Post-Kev Ua Haujlwm Pabcuam Kev Kho Mob thiab Aerospace 3D Printed Parts Tau Li Cas?

Rau engineers thiab procurement managers ua hauj lwm nrog 3D printing titanium alloy qhov chaw nyob rau hauv kev kho mob teb, lub printing kauj ruam nws tus kheej tau ua remarkably txhim khu kev qha. Niaj hnub nimno laser hmoov txaj fusion (LPBF) tshuab niaj hnub tsim Ti6Al4V qhov chaw nrog qhov ntom ntom saum 99.5%, tensile lub zog siab tshaj 1,000 MPa, thiab geometric raug nyob rau hauv 0.1 hli ntawm cov yam ntxwv tseem ceeb. Qhov kev sib tw tau hloov mus rau hauv qab: kom ntseeg tau tias txhua qhov kev tshaj tawm - ua haujlwm ua haujlwm - kev kho cua sov, kev ua tiav saum npoo, kev ua kom tsis muaj menyuam, HIP - tau ua tiav raws li qhov raug, sau tseg rau tus qauv raug, thiab taug qab mus rau txoj cai tswj hwm kom raug.

Tsab ntawv xov xwm no tshuaj xyuas cov ntawv tshaj tawm tshwj xeeb- cov txheej txheem ua tiav uas tswj hwm Ti6Al4V 3D luam ntawv kho mob cog qhov chaw thiab cov khoom siv hauv lub dav hlau, piav qhia tias cov kev xav tau txuas mus rau cov txiaj ntsig tau lees paub, thiab kos rau Sunhingstones 'kev tsim khoom thiab kev tshawb fawb luam tawm los muab cov lus qhia siv tau rau kev ua haujlwm zoo thiab tsim cov engineers navigating qhov chaw no.

Yog vim li cas Post-Kev Ua Haujlwm Yog Daim Ntawv Pov Thawj Bottleneck, Tsis Sau

Kev nkag siab tias kev tsim khoom tsim nyog ntxiv yog qhov kev sib tw luam ntawv tseem nyob hauv kev yuav khoom thiab kev tswj hwm kev tswj hwm, txawm tias cov ntaub ntawv pov thawj ntawm lwm qhov. Kev tshuaj xyuas 2022 tau tshaj tawm nyob rau hauv Phau Ntawv Xov Xwm ntawm Kev Tsim Khoom thiab Cov Khoom Siv Ua Haujlwm tau tshuaj xyuas 87 Ti6Al4V AM cov kev pabcuam tsim nyog thoob plaws cov ntawv thov kev kho mob thiab dav hlau thiab pom tias 68% ntawm lub sijhawm ncua sijhawm thiab tsis yog- cov xwm txheej tsis sib haum xeeb tau tshwm sim los ntawm kev tshaj tawm -kev ua haujlwm - tshwj xeeb ntawm kev ua haujlwm ntawm lub sijhawm - ntawm kev ua haujlwm tsis zoo ntawm lub xeev thiab 9 tus ncej- lub xeev ua haujlwm tau piav qhia hauv cov ntaub ntawv tsim nyog.

Lub hauv paus ua rau yog cov qauv. Additive manufacturing inserts a new class of material states between "raw powder" and "service-ready component" - states that does not exist in the wrought-and-machined supply chain for which most certification frameworks were written. Raws li- ua Ti6Al4V los ntawm LPBF muaj ib qho martensitic microstructure nrog residual tensile stresses uas tuaj yeem ua rau cov khoom siv lub zog tawm los. Lub xeev cov ntaub ntawv no tsis zoo ib yam li annealed Ti6Al4V, uas tsis zoo ib yam li HIP-processed Ti6Al4V, uas tsis yog tib yam li kev daws-kho thiab hnub nyoog Ti6Al4V. Txhua lub xeev muaj cov khoom ntiag tug sib txawv - thiab cov neeg tswj hwm hauv kev kho mob thiab aerospace tau dhau los tshwj xeeb ntxiv txog lub xeev twg lawv xav tau ntawm lub sijhawm twg hauv qhov kev xeem tsim nyog.

Qhov kev cuam tshuam:Yog tias koj qhov kev sim ntsuas tau tsim los ntawm cov khoom siv Ti6Al4V los yog siv rau cov qauv hauv qhov tsis ncaj ncees lawm ncej- ua lub xeev, cov ntaub ntawv nws tsim yuav raug tab sis tsis yog -raws li - ntsuas qhov tsis ncaj ncees lawm.

Ncej -Kev Yuav Tsum Tau Ua rau Ti6Al4V 3D Printing Medical Implant Parts

Kev ntxhov siab thiab kev kho cua sov

Raws li - ua LPBF Ti6Al4V muaj cov kev ntxhov siab seem uas tuaj yeem ncav cuag 600-900 MPa nyob rau hauv lub tensile kev taw qhia - ze rau, thiab nyob rau hauv qee kis tshaj, cov khoom 0.2% pov thawj kev nyuaj siab ntawm kwv yees li 1,000 MPa. Cov kev ntxhov siab no yuav tsum tau hais txog ua ntej txhua yam kev sim tshuab, vim tias cov khoom kuaj tau nyob rau hauv raws li - qhov ua tau zoo tsis sawv cev rau lub xeev cov ntaub ntawv uas yuav muaj nyob rau hauv qhov cog thaum lub sijhawm ua haujlwm.

Tus qauv ncej- ua ntu zus rau Ti6Al4V 3D luam ntawv kho mob cog qhov chaw suav nrog:

Kev ntxhov siab rau kev ntxhov siab: feem ntau 650-800℃hauv argon lossis lub tshuab nqus tsev rau 2-4 teev. Qhov no txo ​​cov kev ntxhov siab nyob hauv qhov tsis muaj qhov hloov pauv ntawm martensitic microstructure, tso cai rau kev soj ntsuam qhov ntev thiab pib cov yam ntxwv ntawm kev siv tshuab.

Kev kho mob thiab kev laus (STA): kev kho mob ntawm 900-950℃tom qab txias txias thiab kev laus ntawm 500-600 degree. STA hloov cov martensitic microstructure mus rau qhov sib npaug alpha-beta qauv, feem ntau txhim kho UTS rau 1,100–1,200 MPa thiab qaug zog los ntawm 20–30% piv rau kev ntxhov siab-cov qauv kho tau.

Kub isostatic nias (HIP): ib txhij kub siab (900-950 degree) thiab isostatic siab (100-200 MPa) kom kaw nrog porosity. Rau kev cai 3D luam tawm cov qauv kho mob thiab kev cog qoob loo, HIP tau nce ntxiv los ntawm FDA cov ntaub ntawv xa mus thiab ceeb toom rau lub cev cov ntaub ntawv, tshwj xeeb tshaj yog rau kev thauj khoom - cov ntawv thov kabmob.

Ib txoj kev tshawb fawb xyoo 2021 hauv International Journal of Fatigue tau pom tias HIP ua raws li STA tau nce qhov qaug zog txwv ntawm LPBF Ti6Al4V los ntawm 45–60% ntawm 10⁷ cycles piv rau kev ntxhov siab-relieved-tsuas yog cov qauv, feem ntau los ntawm kev tshem tawm subfaces pores} qhov pib ua. RauTi6Al4V 3D luam ntawv kho mob cog qhov chawraug rau cyclic loading - orthopedic implants, spinal cages, dental frameworks - qhov sib txawv no tuaj yeem txiav txim siab seb ib feem hla lossis ua tsis tiav ISO 12107 qaug zog tus yam ntxwv.

Nto Finishing thiab Biocompatibility

Raws li - ua LPBF Ti6Al4V qhov chaw nthuav tawm Ra qhov tseem ceeb ntawm 10–25 μm, nyob ntawm kev tsim kho. Rau feem ntau cov ntawv cog lus, qhov no tsis tuaj yeem lees txais rau ob qho laj thawj: qhov roughness saum npoo ntawm qib no txhawb cov kab mob adhesion hauv vivo, thiab cov hmoov sintered ib nrab ntawm cov li - qhov chaw tsim yog cov ntaub ntawv pov thawj ntawm cov hlau ion tso tawm uas tuaj yeem ua rau inflammatory teb.

Cov ntawv tshaj tawm- ua ntu zus rau qhov zoo hauv 3D luam ntawv titanium alloy qhov chaw hauv kev kho mob feem ntau suav nrog:

Abrasive blasting (iav hlaws los yog alumina): txo Ra mus rau 3-8 μm thiab tshem tawm cov hmoov av

Electropolishing lossis tshuaj etching: ua tiav Ra ​​0.5-1.5 μm, tshem tawm cov txheej txheem thermally cuam tshuam, thiab ua kom huv si titanium oxide passive zaj duab xis

Passivation (raws li ASTM F86 los yog ISO 16428): standardized acid kho kom rov qab thiab optimize cov haiv neeg oxide txheej, yuav tsum tau rau ISO 10993 biocompatibility tsim nyog

Anodizing lossis ntshav plasma electrolytic oxidation (PEO): xaiv tau rau cov ntawv thov uas yuav tsum tau ua kom zoo dua osseointegration nto textures

TS EN ISO 10993-1 (Kev Ntsuam Xyuas Kev Siv Tshuaj Kho Mob Biological) xav kom kuaj biocompatibility ntawm cov qauv hauv lawv lub xeev ua tiav thiab ua kom tsis muaj menyuam. Qhov no yog qhov yuav tsum tau nkag siab ntau zaus: kev tshawb fawb biocompatibility ua ntawm polished Ti6Al4V daim coupon tsis tsim nyog raws li - ua los yog hlaws-blasted implant nto. Cov kab lus xeem yuav tsum phim cov ntawv tsim khoom hauv txhua qhov kev hwm uas tuaj yeem cuam tshuam txog cov lus teb lom neeg.

Sterilization Validation thiab Material State Interaction

Kev xaiv txoj kev ua kom tsis muaj menyuam muaj qhov cuam tshuam ncaj qha rau kev tshaj tawm - ua ntu zus. Autoclave sterilization (steam ntawm 121-134 degree) tsis muaj txiaj ntsig zoo rau Ti6Al4V cov khoom siv kho tshuab thiab sib haum nrog feem ntau cov kev kho mob saum npoo. Ethylene oxide (EtO) thiab gamma irradiation kuj tau siv dav rau kev cog hniav kom tsis muaj menyuam thiab feem ntau sib xws nrog cov txheej txheem titanium.

Txawm li cas los xij, cov txheej txheem tseem ceeb: passivation yuav tsum tau ua tom qab tag nrho cov kev ua haujlwm thermal (xws li HIP thiab STA) vim tias qhov kub ntawm - ua haujlwm kub cuam tshuam cov txheej txheem oxide passive. Ib qho passivation ua ntej qhov kawg kev kho cua sov yog invalidated los ntawm lub tom ntej thermal voj voog. Qhov kev ua tsis tiav no yog ib qho uas tsis yog - nrhiav pom nyob rau hauv FDA 510 (k) xa rau 3D luam ntawv titanium alloy qhov chaw hauv kev kho mob.

Tshaj tawm -Kev Yuav Tsum Ua Haujlwm rau Aerospace Ti6Al4V Cheebtsam

AS9100 thiab NADCAP: Cov Txheej Txheem Tsim Nyog

Aerospace certification rau additive manufactured Ti6Al4V Cheebtsam ua hauj lwm nyob rau hauv ib tug txheej txheej txheej. AS9100 (Quality Management Systems - Requirements for Aviation, Space, and Defense) tswj hwm tag nrho cov kev tswj xyuas zoo. NADCAP (National Aerospace and Defense Contractors Accreditation Program) muab cov txheej txheem kev lees paub tshwj xeeb rau cov txheej txheem tshwj xeeb suav nrog kev kho cua sov, ua kom tiav, NDT, thiab kev ua tshuaj lom neeg.

Rau Ti6Al4V Cheebtsam, NADCAP kev lees paub hauv kev kho cua sov feem ntau yuav tsum tau ua ua ntej cov thermal post- cov kauj ruam ua tiav tuaj yeem ua tiav ntawm lub davhlau- cov ntawv pov thawj. Qhov no yuav tsum muaj qhov chaw kho cua sov kom pom tau tias:

Calibrated thiab soj ntsuam cov furnaces ntsib AMS 2750 (yuav tsum tau pyrometry)

Cov txheej txheem sau tseg rau txhua lub voj voog hlau thiab thermal, tshuaj xyuas thiab pom zoo los ntawm NADCAP auditors

Batch cov ntaub ntawv nrog kev ntsuas kub tsis tu ncua rau txhua lub voj voog ntau lawm

Cov ntaub ntawv tsim nyog ntawm cov neeg ua haujlwm

AMS 4928 (Titanium Alloy Bars, Billets, thiab Forgings, 6Al-4V) yog lub hauv paus wrought khoom specification rau aerospace Ti6Al4V. Nws cov kev xav tau kev siv tshuab tau hais dav dav hauv cov txheej txheem tsim khoom ntxiv, txawm hais tias ASTM F3001 (Standard Specification for Additive Manufacturing Titanium-6 Aluminium-4 Vanadium ELI with Powder Bed Fusion) yog cov ntaub ntawv siv tau ncaj qha rau LPBF qhov chaw thiab tau nce ntxiv hauv aerospace cov tswv yim zoo.

NDT Requirements thiab Lawv Kev Sib Raug Zoo rau Kev Tshaj Tawm -Lub Xeev Ua Haujlwm

Tsis yog-kev kuaj kev puas tsuaj rau aerospace Ti6Al4V Cheebtsam yog ua nyob rau hauv kev tshaj tawm- lub xeev ua tiav, thiab kev xaiv ntawm NDT txoj kev yog txwv los ntawm qhov chaw ntawm lub sijhawm tshuaj ntsuam:

Kev tshuaj ntsuam fluorescent penetrant (FPI, ASTM E1417):yuav tsum tau ib tug du, huv si nto - feem ntau post-machined los yog electropolished. Raws li - ua AM qhov chaw tsim cov fluorescence ntau dhau los uas npog cov cim tiag tiag. FPI tau siv los ua -tsim los yog hlaws- blasted nto tsim cov txiaj ntsig uas tsis txhais tau rau cov qauv dav hlau.

Computed tomography (CT):txoj kev nyiam rau raws li - ua los yog ze -net-zoo li AM qhov chaw. CT tsis yog qhov chaw- xeev- rhiab heev thiab tuaj yeem ntes cov porosity sab hauv, tsis muaj - ntawm - fusion defects, thiab tawg ua ntej ua tiav qhov chaw tiav. Raukev cai 3D luam ntawv kho mob qauvsiv los ua cov cuab yeej npaj phais mob, CT kuj tseem ua haujlwm rau kev txheeb xyuas qhov ntev.

Kev kuaj ultrasonic (UT):muaj feem xyuam rau machined sections thiab thicker cross-sections. Yuav tsum muaj qhov zoo sib xws ntawm qhov chaw tiav thiab coupling tej yam kev mob; Cov txiaj ntsig tsis tuaj yeem rov ua dua ntawm qhov ntxhib li - cov chaw tsim.

Lub koom haum European Space Agency (ESA), dhau los ntawm nws cov Additive Manufacturing Roadmap thiab cov ntaub ntawv qhia txog kev sib raug zoo, tau ua tus tawm tswv yim zoo rau cov txheej txheem - xeev - tshwj xeeb NDT cov txheej txheem hauv aerospace AM kev tsim nyog. ESA cov lus qhia tau tshaj tawm qhia meej hais tias NDT txoj kev, txheej txheem, thiab cov txheej txheem lees paub yog tag nrho cov ntsiab lus tau hais tseg nrog rau kev xa mus rau qhov tshwj xeeb tshaj tawm - ua haujlwm lub xeev ntawm ntu thaum lub sijhawm tshuaj xyuas - qhov yuav tsum tau tsom iav FDA kev coj ua rau cov khoom siv kho mob thiab qhia txog tib yam teeb meem hauv qab no: NDT cov txiaj ntsig tsuas yog muaj txiaj ntsig thaum txoj kev tshuaj ntsuam xyuas thiab kev sib raug zoo ntawm lub xeev.

Case Study: Ti6Al4V Implant and Aerospace Bracket Qualification ntawm Sunhingstones

Daim Ntawv Thov Kev Kho Mob: Spinal Cage Implant hauv Ti6Al4V

Xyoo 2023, Sunhingstones koom tes nrog lub tuam txhab European orthopedic cov cuab yeej los tsim thiab tsim nyog tus neeg mob- tshwj xeeb qaum interbody fusion tawb hauv Ti6Al4V, npaj rau CE kos npe raws li EU Kev Tswj Xyuas Khoom Siv Kho Mob (MDR 2017/745). Kev cog qoob loo yog tsim los ntawm LPBF thiab yuav tsum tau ua tiav kev tshaj tawm - kev ua haujlwm thiab kev tsim nyog ua ntej xa cov ntaub ntawv.

Cov ntawv tshaj tawm - txheej txheem ua tiav yog:

Kev ntxhov siab ntawm 730℃/ 2 teev / lub tshuab nqus tsev

HIP ntawm 920℃/ 100 MPa / 2 teev

CNC machining ntawm pob txha qhov chaw rau Ra 1.6 μm

Abrasive blasting ntawm seem seem rau Ra 3.2-6.3 μm (los txhawb osseointegration)

Passivation rau ASTM F 86

CT scanning (100% ntawm ntau lawm batch) rau porosity thiab seem pov thawj

TS EN ISO 12107 Kev sim qaug zog ntawm kev tshaj tawm -HIP, post- cov qauv siv tshuab

ISO 10993-1 Kev ntsuam xyuas biocompatibility ntawm cov qauv kawg hauv xeev

Kev ntsuas qaug zog rau ISO 12107 ua rau qaug zog txwv ntawm 620 MPa ntawm 10⁷ cycles - tshaj li lub hom phiaj ntawm 550 MPa tau los ntawm kev txheeb xyuas cov qauv. CT scanning ntawm tag nrho cov khoom tsim tawm tau lees paub qhov siab tshaj qhov pore txoj kab uas hla ntawm 42 microns thoob plaws txhua qhov chaw, yooj yim hauv 100-micron qhov kev lees paub tau teev tseg hauv cov ntaub ntawv keeb kwm tsim. Cov ntaub ntawv thev naus laus zis tau lees paub los ntawm lub cev ceeb toom thaum xub thawj xa tawm, tsis muaj kev thov rau cov ntaub ntawv kho tshuab ntxiv.

Sunhingstones 'cov pab pawg zoo tau sau tag nrho cov ntawv tshaj tawm - ua cov pob tsim nyog raws li qhov kev pab cuam rau Ti6Al4V 3D luam ntawv kho mob cog qhov chaw nyob rau hauv MDR, thiab raws tu qauv tau raug hloov kho rau ob qho kev cog lus ntxiv.

Aerospace Daim Ntawv Thov: Cov Qauv Bracket hauv Ti6Al4V

Nyob rau tib lub xyoo, Sunhingstones ua tiav kev tsim nyog ntawm lub davhlau -Ti6Al4V cov qauv tseem ceeb rau cov chaw tsim khoom nyob sab Europe aerospace, tsim los ntawm LPBF thiab tsim nyog raws li AS9100 nrog NADCAP- tau lees paub kev ua haujlwm thermal.

Cov ntawv tshaj tawm - ua ntu zus suav nrog:

Kev ntxhov siab ntawm 700℃/ 2 teev hauv NADCAP- tau lees paub lub tshuab nqus tsev

STA: daws kev kho mob ntawm 940℃/ 1 teev, dej quench, laus ntawm 530℃/ 4 teev

CNC machining ntawm tag nrho cov interface nto

FPI (fluorescent penetrant tshuaj xyuas) rau ASTM E1417, Chav Kawm 1, ua haujlwm tom qab-machining

CT scanning ntawm thawj -cov qauv qauv (peb kab lus) rau kev ua tus yam ntxwv tsis xws luag

Kev ntsuas tensile ntawm STA cov qauv yielded UTS ntawm 1,165 MPa thiab yield zog ntawm 1,080 MPa - ob qho tib si dhau AMS 4928 yam tsawg kawg nkaus. FPI pom xoom qhov qhia txog qhov cuam tshuam thoob plaws tag nrho cov khoom tsim tawm. CT scanning thawj zaug -cov qauv qauv tau lees paub qhov siab tshaj plaws pore txoj kab uas hla ntawm 55 microns, qis dua 80-micron qhov kev lees paub txwv. Cov pob ntawv tsim nyog tau xa nrog tag nrho NADCAP cov ntaub ntawv pov thawj lub tshuab hluav taws xob thiab tau txais kev pom zoo los ntawm tus neeg siv khoom tus neeg sawv cev zoo yam tsis muaj kev kho dua tshiab.

Tsim Ib Daim Ntawv Pom Zoo Ua Raws Li -Kev Npaj Ua Haujlwm: Ib Lub Tswv Yim Ua Haujlwm

Cov qauv hauv qab no qhia txog txoj hauv kev Sunhingstones siv rau txhua qhov tshiab Ti6Al4V additive manufacturing programs hauv kev kho mob thiab aerospace sectors. Nws muaj feem cuam tshuam seb qhov kev zov me nyuam yog thawj zaug -hauv-chav cog cog, ib qho kev cai 3D luam tawm qauv kho mob rau kev npaj phais, lossis ib qho kev rov ua haujlwm hauv lub dav hlau.

Kauj Ruam 1: Txheeb xyuas Txoj Cai Tswjfwm Ua Ntej Ua Ntej Tsim Cov Ntawv Tshaj Tawm -Ua ntu ntu

Cov cuab yeej kho mob thiab cov ntaub ntawv pov thawj aerospace qhia txog cov khoom siv sib txawv, cov qauv kev sim, thiab cov qauv ntaub ntawv. Ib qho kev cog qoob loo tsim nyog raws li FDA 510(k) lossis EU MDR yuav muaj cov ntawv tshaj tawm sib txawv - cov kev xav tau ua ntau dua li cov khoom siv dav hlau tsim nyog raws li AS9100/NADCAP. Txhais txoj kev tswj hwm ua ntej; muab tus ncej- ua ntu zus los ntawm nws, tsis yog lwm txoj hauv kev.

Kauj Ruam 2: Daim Ntawv Qhia Txhua Daim Ntawv Tshaj Tawm -Ua cov kauj ruam mus rau qhov yuav tsum tau muaj ntawv pov thawj tshwj xeeb

Txhua qhov kev ua haujlwm hauv kev tshaj tawm - ua ntu zus yuav tsum muaj kev sib txuas ncaj qha rau yam tsawg kawg ib daim ntawv pov thawj yuav tsum tau ua. HIP muaj nyob rau kom ua tau raws li qhov xav tau ntawm lub neej qaug zog ntawm ISO 12107. Passivation muaj los ua kom tau raws li qhov xav tau ntawm biocompatibility ntawm ISO 10993-1. STA muaj los ua kom tau raws li qhov xav tau ntawm lub zog tensile ntawm AMS 4928 lossis ASTM F3001. Yog tias ib kauj ruam tsis tuaj yeem txuas nrog ib qho kev xav tau tshwj xeeb, nws qhov tsim nyog thiab kev ua raws txoj haujlwm yuav tsum raug nug.

Kauj Ruam 3: Ua Txhua Qhov Kev Xeem Txuj Ci ntawm Kev Xeem Kawg - Lub Xeev Cov Qauv

Txhua qhov kev ntsuam xyuas tshuab, lom neeg, thiab NDT yuav tsum tau ua ntawm cov qauv hauv lawv qhov kawg ncej - ua tiav thiab nto - lub xeev tiav - lub xeev uas phim cov khoom tsim tawm thaum lub sijhawm xa khoom. Kev ntsuam xyuas raws li - ua, ua tiav ib nrab, lossis cov qauv sib txawv sib txawv tsim cov ntaub ntawv uas siv tau tab sis tsis yog- ua raws, thiab tsis tuaj yeem siv los txhawb kev xa tawm.

Kauj Ruam 4: Sau cov ntaub ntawv lub xeev ntawm txhua qhov chaw soj ntsuam tuav

Txhua daim ntawv tshuaj xyuas yuav tsum qhia meej meej txog kev ua haujlwm ntawm qhov chaw thaum lub sijhawm ntsuas. "Tensile zog 1,165 MPa - ncej-STA, ncej-machining, ua ntej- txheej" yog unambiguous. "Tensile lub zog 1,165 MPa" yam tsis muaj lub xeev siv tsis tuaj yeem siv los ua kom pom kev ua raws li lub xeev- qhov yuav tsum tau muaj tshwj xeeb.

Kauj Ruam 5: Txheeb xyuas cov txheej txheem tshwj xeeb nrog txheej txheem -Kev lees paub tshwj xeeb

Rau aerospace, NADCAP kev lees paub rau kev kho cua sov, FPI, thiab kev ua tshuaj lom neeg feem ntau yuav tsum tau ua. Rau kev kho mob, ISO 13485 daim ntawv pov thawj ntawm cov ntawv tshaj tawm - cov chaw ua haujlwm thiab kev taug qab ntawm txhua yam khoom siv (etching reagents, passivation solutions, HIP gas purity) yuav tsum tau ua kom pom. Outsourcing ib qho txheej txheem tshwj xeeb rau tus tsis yog- tus neeg muag khoom tau lees paub yog ib qho tsis zoo - nrhiav pom hauv FDA thiab ceeb toom rau kev tshuaj xyuas lub cev.

Cov lus nug nquag nug (FAQ)

Cov lus nug no hais txog cov ntsiab lus feem ntau ntawm kev tsis meej pem uas tshwm sim thaum tshaj tawm - cov txheej txheem kev ua haujlwm cuam tshuam nrog cov ntawv pov thawj rau Ti6Al4V 3D luam tawm qhov chaw hauv kev kho mob thiab kev siv dav hlau.

Q1: Puas yog txhua qhov Ti6Al4V 3D luam ntawv kho mob cog ib feem yuav tsum tau HIP?

Tsis yog universally, tab sis nce. HIP yog qhov yuav tsum tau ua thaum cov ntaub ntawv keeb kwm tsim tau qhia txog qhov yuav tsum tau ua rau lub neej qaug zog uas raws li - tsim los yog kev ntxhov siab - cov ntaub ntawv kho tsis tuaj yeem ua tiav, lossis thaum cov ntaub ntawv tswj hwm xa mus rau ISO 12107 cov ntaub ntawv qaug zog tsim los ntawm HIP cov qauv. Rau kev thauj khoom-cov kabmob implants - orthopaedic, txha nraub qaum, thiab kho hniav - HIP tam sim no suav tias yog kev coj ua qauv los ntawm feem ntau lub cev ceeb toom thiab FDA tshuaj xyuas. Rau qhov tsis yog-load- cov ntawv thov cov kabmob xws li kev cai 3D luam tawm cov qauv kho mob siv rau kev npaj phais, HIP yuav tsis tas yuav tsum tau.

Q2: Puas yog tib txoj kev tshaj tawm - ua ntu zus tuaj yeem siv rau ob qho tib si kho mob thiab aerospace Ti6Al4V qhov chaw?

Lub voj voog thermal feem ntau zoo sib xws (HIP tsis thiab STA cycles rau Ti6Al4V sib tshooj loj ntawm kev lag luam), tab sis cov ntaub ntawv pov thawj, kev lees paub, thiab kev xeem yuav tsum sib txawv heev. Kev kho mob yuav tsum tau ISO 13485, ISO 10993 biocompatibility cov ntaub ntawv, thiab passivation ib ASTM F86. Aerospace xav tau AS9100, NADCAP-kev lees paub kev ua haujlwm thermal, thiab FPI lossis CT rau aerospace NDT cov qauv. Ib qho kev sib koom ua ke tuaj yeem ua tau tab sis yuav tsum txaus siab rau ob qho tib si ntawm nws tus kheej.

Q3: Yuav ua li cas yog ib theem zuj zus rau passivation txheeb ze rau lwm tus ncej- ua cov kauj ruam?

Passivation yuav tsum yog qhov kawg thermal / tshuaj ua haujlwm ua ntej ntim thiab kom tsis muaj menyuam. Cov cua kub tom ntej saum toj no kwv yees li 300℃yuav cuam tshuam cov txheej txheem oxide passive, invalidating passivation. Qhov no txhais tau tias passivation yuav tsum ua raws HIP, STA, thiab tag nrho cov kev ua haujlwm machining. Passivation ua ntej qhov kawg kev kho cua sov los yog machining tsis yog -raws li ISO 10993 biocompatibility tsim nyog thiab yuav tsum tau rov ua dua.

Q4: Vim li cas qhov chaw tiav qhov tseem ceeb rau biocompatibility tsim nyog?

ISO 10993-1 xav kom kuaj biocompatibility yog ua los ntawm cov qauv hauv lawv lub xeev ua tiav thiab ua kom tsis muaj menyuam. Qhov chaw chemistry, roughness, thiab oxide txheej muaj pes tsawg leeg ntawm ib tug li - ua LPBF Ti6Al4V nto yog materially txawv los ntawm cov electropolished thiab passivated nto. Hlau ion tso tawm tus nqi, protein adsorption, thiab cellular teb yog tag nrho saum npoo - xeev-dependent. Ib txoj kev tshawb nrhiav biocompatibility ua nyob rau ntawm qhov chaw sib txawv ntawm qhov chaw tsim khoom siv tsis tuaj yeem siv los ua pov thawj tsim nyog.

Q5: Sunhingstones ua li cas thiaj li ua tau zoo tom qab- ua raws li kev ua raws li Ti6Al4V 3D luam ntawv kho mob cog qhov chaw?

Sunhingstones muab ib tus kws tshaj lij ua haujlwm zoo rau txhua qhov kev kho mob thiab chaw dav hlau uas yog lub luag haujlwm rau kev ua daim ntawv tshaj tawm - ua ntu zus rau cov ntawv pov thawj tshwj xeeb ua ntej kev tsim khoom pib. Tag nrho cov kev ua haujlwm thermal yog ua nyob rau hauv ISO 13485- ntawv pov thawj (kev kho mob) lossis NADCAP-accredited (aerospace) cov chaw nrog cov ntaub ntawv tag nrho. Kev soj ntsuam tuav cov ntsiab lus yog txhais nyob rau hauv txhua lub xeev txoj kev hloov, nrog rau cov ntaub ntawv qhia meej lub xeev cov ntaub ntawv nyob rau hauv txhua txhua cov ntaub ntawv soj ntsuam. Tsis muaj kev soj ntsuam zaum kawg lossis kev xeem ntawv tshaj tawm yam tsis muaj lub xeev cov ntaub ntawv qhia txog kev ua haujlwm ntawm qhov chaw thaum lub sijhawm ntsuas.

Q6: Dab tsi yog qhov tshaj tawm tshaj tawm - ua cov ntaub ntawv tsis ua haujlwm hauv FDA 510(k) xa rau 3D luam ntawv titanium cog?

Qhov feem ntau hais txog qhov tsis txaus - raws li FDA tau tshaj tawm cov lus qhia txog kev tsim khoom ntxiv (Technical Considerations for Additive Manufactured Medical Devices, 2017) - yog qhov tsis sib haum xeeb ntawm lub xeev kev ua haujlwm ntawm cov qauv kuaj thiab lub xeev ua haujlwm tau piav qhia hauv cov khoom tsim tshwj xeeb. Qhov no suav nrog cov qauv kev sim tshuab uas tsis raug rau tib qho kev tshaj tawm - ua ntu zus raws li cov khoom cog, cov ntaub ntawv biocompatibility tsim los ntawm qhov sib txawv tiav lawm, thiab kev ua kom tsis muaj menyuam ua ntej qhov kawg passivation. Tag nrho cov no tuaj yeem tiv thaiv tau los ntawm kev sib sau ua ke ua ntej.

Xaus: Daim Ntawv Luam yog qhov pib, tsis yog kab tiav

Qhov xwm txheej tau piav qhia ntawm qhov qhib ntawm tsab xov xwm no - ib qho kev cog lus suab nrov qeeb los ntawm kev tshaj tawm - ua cov ntaub ntawv sib txawv - yog ib qho teeb meem daws tau. Nws tsis yog daws los ntawm kev luam ntawv zoo dua. Nws raug daws los ntawm kev kho tus ncej- ua ntu ntu raws li cov ntawv pov thawj kev ua haujlwm engineering: tsim los rau cov txheej txheem tswj hwm, ua tiav raws li qhov tseeb, sim ntawm qhov kawg- lub xeev cov qauv, thiab sau tseg nrog cov ntaub ntawv qhia meej txog lub xeev cov khoom ntawm txhua qhov tuav.

Rau 3D luam ntawv titanium alloy qhov chaw hauv kev kho mob, txoj hauv kev los ntawm LPBF tsim rau kev tswj hwm kev xa tawm los ntawm kev ntxhov siab, HIP, nto tiav, passivation, kev ntsuam xyuas biocompatibility, thiab qaug zog tus cwj pwm - txhua kauj ruam tsim cov ntaub ntawv uas tsuas yog muaj txiaj ntsig yog tias nws tau tsim nyob rau hauv qhov kev txiav txim ntawm cov ntaub ntawv raug cai. Rau aerospace structural Cheebtsam, txoj kev khiav los ntawm NADCAP-tso cai thermal ua, STA, machining, thiab FPI - nrog tib yam yuav tsum tau rau lub xeev- cov ntaub ntawv tshwj xeeb ntawm txhua theem.

Sunhingstones tau tsim nws Ti6Al4V additive manufacturing system nyob ib ncig ntawm lub hauv paus ntsiab lus no. Yog tias koj lub koom haum tab tom txhim kho qhov kev tsim nyog rau Ti6Al4V 3D luam ntawv kho mob cog qhov chaw lossis cov khoom siv hauv aerospace thiab xav tau kev taw qhia ntawm kev tshaj tawm -kev tsim ua ntu zus, cov ntaub ntawv pov thawj, lossis cov phiaj xwm kev sim, Sunhingstones engineering pab neeg muaj los txhawb cov txheej txheem los ntawm kev tsim lub hom phiaj rau kev tswj xyuas.

Cov ntawv nyeem thiab nyeem ntxiv

Cov ntaub ntawv hauv qab no tau tshaj tawm cov ntaub ntawv, cov qauv kev qhia, thiab cov ntsiab lus kev qhia hauv kab lus no:

FDA (2017). Kev txiav txim siab rau cov khoom siv kho mob Additive Manufactured: Kev taw qhia rau kev lag luam thiab FDA cov neeg ua haujlwm. US Food and Drug Administration. www.fda.gov/media/97633/download

ASTM International - ASTM F3001-14: Standard Specification rau Additive Manufacturing Titanium-6 Aluminium-4 Vanadium ELI (Ntxiv Tsawg Interstitial) nrog Powder Bed Fusion. www.astm.org/f3001-14.html

ASTM International - ASTM F86-21: Standard Practice for Surface Preparation and Marking of Metallic Surgical Implants. www.astm.org/f0086-21.html

ISO 10993{2}}1: 2018. Kev Ntsuam Xyuas Cov Khoom Siv Khomob Biological - Ntu 1: Kev Ntsuam Xyuas thiab Kev Ntsuas hauv Cov Txheej Txheem Tswj Kev pheej hmoo. International Organization for Standardization. www.iso.org/standard/68936.html

ISO 12107: 2012 Cov Khoom Siv Hlau - Kev Ntsuas Kev Nyuaj Siab - Kev Npaj thiab Kev Ntsuam Xyuas Cov Ntaub Ntawv. International Organization for Standardization. www.iso.org/standard/50242.html

Gong, H. et al. (2021). "Qhov cuam tshuam ntawm HIP thiab STA ntawm kev qaug zog ntawm LPBF Ti-6Al-4V." International Journal of Fatigue, 143, 106007. doi.org/10.1016/j.ijfatigue.2020.106007.

Zhang, X., et al. (2022). "Tshaj tawm- kev ua tiav kev tsim nyog ua tsis tiav hauv cov khoom ntxiv tsim Ti6Al4V: kev tshuaj xyuas zoo." Phau ntawv Journal of Manufacturing and Materials Processing, 6(4), 78. doi.org/10.3390/jmmp6040078

SAE International - AMS 4928V: Titanium Alloy Bars, Billets, thiab Forgings 6Al-4V. www.sae.org/standards/content/ams4928v/

ESA (2021). Additive Manufacturing Roadmap - Technical Memoranda on NDT thiab Post-Kev Tsim Nyog Ua Haujlwm rau AM Metallic Cheebtsam. European Space Agency. www.esa.int/Enabling_Support/Space_Engineering_Technology/Additive_Manufacturing

NADCAP - Cov Txheej Txheem Kev Ntsuas Kub Kub. Performance Review Institute. www.pri-nadcap.org/commodity/heat-kev kho mob/

Txoj Cai (EU) 2017/745 ntawm Cov Khoom Siv Kho Mob (EU MDR). Phau ntawv Journal ntawm European Union. eur-lex.europa.eu/eli/reg/2017/745/oj