Vim li cas Inconel 718 hu ua super alloy?
Lub hauv paus ntawm peb kev lag luam aerospace, kev tiv thaiv thiab lub zog yog tsim cov khoom uas tuaj yeem tiv taus cua sov thiab siab. Cov khoom no feem ntau yog tsim los ntawm cov hlau hu ua Inconel 718, uas muaj zog heev, corrosion-resistant, high-temperature nickel-chromium alloy.
Cov hlau no feem ntau yog machined, tua peened, kos, dov, thiab welded los tsim cov duab thiab microstructure yuav tsum muaj cov khoom uas xav tau kev ua haujlwm siab. Cov hlau feem ntau yog siv nyob rau hauv lub foob pob hluav taws cav, dav hlau cav, lub nkoj siab, roj turbines thiab lwm yam khoom. Tab sis kev ua hlau yog kim. Rau qhov chaw nrog cov geometry nyuaj thiab cov yam ntxwv sab hauv, kev tsim khoom ncaj qha (tsim cov khoom hauv nws daim ntawv kawg) yuav yog kev lag luam dawb huv.
Txhawm rau ua tiav qhov no, cov kws tshawb fawb tau tig mus rau kev tsim khoom ntxiv (AM), tshwj xeeb yog laser hmoov txaj fusion (LPBF) thev naus laus zis, kom ua tiav "ze net shape," ze-kawg tsim khoom ntawm aerospace Cheebtsam. Vim tias cov khoom 3D yog tsim los ntawm txheej txheej los ntawm kev tsim cov khoom siv ntxiv, thiab cov khoom sib txawv ntawm cov khoom muaj qhov sib txawv ntawm cov cua txias, ntau qhov sib txawv thiab cov qauv tsim. Qhov kev sib tw yog tias cov thermal tej yam kev mob ntawm LPBF ua rau microstructure thiab mechanical zog uas tsis yog nyob rau theem uas yuav tsum tau rau cov khoom kawg.
Kev kho cua sov tom qab tuaj yeem pab kho cov khoom uas xav tau, tab sis kev tsim kho txoj kev kho kom zoo tshaj plaws thaum tswj hwm lub hom phiaj microstructure yuav tsum muaj lub zog tseem ceeb.
United Technologies Research Center (UTRC), koom tes nrog Pratt & Whitney thiab UTC Aerospace Systems, tab tom tsim cov qauv txheej txheem physics los kwv yees lub microstructure ntawm additively manufactured aerospace structural qhov chaw ua los ntawm nickel superalloys.
