Cov txheej txheem kho cua sov puas txawv ntawm cov khoom?

Kev kho cua sov yog dab tsi thiab vim li cas nws tseem ceeb hauv SLM 3D Printing?

Dab tsi tshwm sim hauv ib qho hlau thaum lub sij hawm SLM luam ntawv?

SLM (Selective Laser Melting) cuam tshuam nrog kev tawg sai thiab kev ua kom muaj zog. Cov cua txias tuaj yeem tshaj 10 ^ 6℃/ s, tsim:

High residual tensile stresses uas ua rau warping los yog tawg thaum tshem tawm ntawm lub tsev phaj.

Internal porosity (tsis muaj - ntawm - fusion lossis keyhole pores).

Anisotropic microstructure - feem ntau zoo acicular martensite los yog cellular dendrites nrog columnar nplej ua raws li kev coj ua.

Yog tsis muaj kev tshaj tawm - ua tiav, cov khoom yuav pom cov khoom tsis sib xws, txo lub neej qaug zog, thiab qhov tsis txaus ntseeg thaum lub sijhawm ua haujlwm lossis siv.

Cov hom kev kho cua sov tseem ceeb siv tom qab SLM luam ntawv

Cov txheej txheem muaj xws li:

Kev ntxhov siab rau kev ntxhov siab: Tsawg- mus rau- qhov kub thiab txias kom txo qis kev ntxhov siab uas tsis muaj kev hloov pauv loj.

Kev kho cua sov + kev laus: Dissolves theem thiab tso cai los nag kom muaj zog / ductility tshuav.

Kub Isostatic Pressing (HIP): Kub kub + siab siab (feem ntau argon) tshem tawm cov porosity thiab txhim kho qaug zog. Feem ntau ua ke nrog lwm yam kev kho mob.

Annealing vs. Normalizing (Quick Comparison):

Annealing: qeeb txias rau softness / ductility thiab kev ntxhov siab nyem.

Normalizing: Cua txias kom zoo ib yam, cov qauv ua kom zoo zoo thiab muaj zog me ntsis.

Cov txheej txheem kho cua sov puas hloov pauv raws li cov khoom siv?

Yog - tseem ceeb heev. Qhov sib txawv ntawm cov ntsiab lus melting, thermal conductivity, theem kev hloov pauv tus cwj pwm, thiab cov ntsiab lus alloying. Ib qho -loj- haum- txhua txoj hauv kev ua tsis tiav; cov ntaub ntawv - cov txheej txheem tshwj xeeb yuav tsum tau ua.

Titanium Alloys (piv txwv li, Ti-6Al-4V)

Ti-6Al-4V yog nrov rau aerospace thiab kev kho mob qauv vim nws lub zog-rau-qhov hnyav piv thiab biocompatibility.

Cov txheej txheem ib txwm: Kev ntxhov siab (600–750 degree) → yeem HIP (900–950℃, ~ 100 MPa) → tshuaj kho + kev laus (STA). Siv lub tshuab nqus tsev lossis argon cua los tiv thaiv oxidation. Beta transus kub yog ~ 995 degree.

Kev txhim kho tseem ceeb:

Raws li - ua: Lub zog siab tab sis tsis tshua muaj ductility (~ 6-8% elongation), residual stresses.

Post-treatment: Better balance (e.g., UTS ~950–1080 MPa, elongation >10-14%). HIP kaw qhov pores rau lub neej qaug zog zoo dua.

Teb rau cov lus nug ntau: Yog, titanium feem ntau xav tau kev kho cua sov tom qab 3D luam ntawv rau feem ntau ua haujlwm.

Stainless hlau (piv txwv li, 316L, 17-4PH)

316l :ua. Feem ntau siv kev ntxhov siab los yog tag nrho anneal (900-1050 degree) kom homogenize microstructure, txo anisotropy, thiab txhim kho ductility / corrosion kuj. Raws li - cov khoom tsim tau zoo heev tab sis tau txais txiaj ntsig los ntawm kev sib tsoo kom sib xws.

17-4PH: nag lossis daus. Tshuaj anneal + laus (xws li, H900 mob) rau siab zog thiab hardness. Kev hla ua rau cov khoom tsis sib xws.

Aluminium Alloys (xws li AlSi10Mg, Al6061)

Tsawg melting point (~ 600℃range) xav tau kev tswj nruj dua kom tsis txhob muaj kev cuam tshuam lossis dhau - laus.

Feem ntau: T6 kev kho mob - daws kev kho mob (~ 535℃) + quenching + dag aging (~ 158-180℃). Txhim kho tensile lub zog loj thaum tswj Si eutectic network.

Risk: Kev nrawm nrawm tuaj yeem ua rau muaj kev cuam tshuam. Ncej -T6 qhov chaw qhia tau hais tias muaj txiaj ntsig zoo hauv lub zog tab sis tuaj yeem pauv qee qhov ductility nyob ntawm qhov tsis muaj.

Nickel Superalloys (piv txwv li, IN625, IN718)

Qhov tseem ceeb rau siab -kub aerospace thiab turbine applications.

Cov txheej txheem: Feem ntau ntau-theem - homogenization/solution (980–1080℃+) kom yaj Laves theem → ob zaug kev laus (xws li, 720℃/ 8h + 620℃/ 8h rau IN718). Complex thiab sij hawm-intensive vim kev cais nyob rau hauv raws li{14}}ua microstructure.

Cov yields zoo heev creep thiab qaug zog tiv thaiv tab sis yuav tsum tau tswj meej thiab ntev lub sij hawm voj voog.

Cov cuab yeej hlau & Maraging hlau (piv txwv li, H13, MS1/18Ni300)

Maraging Steel (18Ni300): Kev laus yooj yim (480–520 degree, ob peb teev) ua tiav qhov siab tshaj plaws hardness (~ 50–54 HRC) thiab ultra- lub zog siab (UTS txog ~ 1900–2100 MPa) ntawm intermetallic precipitates. Kev daws annealing yeem ua ntej kev laus.

H13 Tool Steel: Austenitizing + quenching / tempering (los yog tempering ncaj qha). Lub hom phiaj 45–52 HRC rau pwm thiab ntxig. Thaum tshav kub kub kho relieves kev nyuaj siab thiab optimizes kub hardness.

Sab-los ntawm-Side Comparison: Kev Kho Mob Kub Kub los ntawm Cov Khoom

Yuav ua li cas yog tias koj hla kev kho cua sov?

Qhov tshwm sim tiag tiag hauv Prototyping Projects

Dimensional hloov los yog warping thaum CNC machining.

Thaum ntxov qaug zog los yog brittle tsis ua hauj lwm nyob rau hauv kev ua hauj lwm / load testing.

Piv txwv li: Lub aerospace bracket yam tsis muaj kev ntxhov siab tau tawg thaum lub sij hawm kuaj kev vibration vim tsis tau txheeb xyuas cov kev ntxhov siab uas seem.

HIP tshwj xeeb tshaj yog muaj txiaj ntsig rau qhov tseem ceeb vim nws txo qhov porosity.

Thaum twg koj tuaj yeem hla lossis yooj yim?

Tsis yog- cov qauv tsim lossis pom kev pom.

Cov ntaub ntawv zoo li 316L nrog cov teeb meem kev ntxhov siab hauv lub hauv paus.

Thaum ceev yog qhov tseem ceeb thiab qhov kev ua tau zoo tso cai (sib tham nrog koj tus neeg muag khoom).

Kev lag luam Standards thiab Certifications

Cov ntaub ntawv tseem ceeb suav nrog ASTM F3301 (cov ntawv ntsuas cua sov{1}} ua rau PBF hlau), AMS cov qauv (xws li, AMS 2801 rau titanium, AMS 2759 series rau steels), thiab ISO / ASTM specs rau aerospace / kev kho mob.

Ua haujlwm nrog cov ntawv pov thawj SLM 3D luam ntawv qauv tsim kom muaj kev ua raws li kev tswj hwm kev lag luam (aerospace, kho mob, tsheb).