Kawm Txog Cov Txheej Txheem Nqus Tsev Rau Gr5 Alloy Phaj

Gr5 titanium domestic tseem hu ua TC4, TC4 titanium alloy muaj 6% ntawm -stabilizing keeb Al thiab 4% ntawm -stabilizing element V, belongs rau Ti-Al-V system raug +- titanium alloy. Titanium alloy series ntawm alloys suav txog li 40% ntawm kev ua lag luam siv, kev ua haujlwm txias yog qhov nyuaj heev, lub ntsiab yog vim li cas alloy lub plasticity, flexural zog piv, thiab nws cov khoom siv thiab kev ua tau zoo nyob ntawm ntau lub koom haum metallurgical, lub koom haum metallurgical nyob ntawm Feem ntau ntawm cov txheej txheem kho cua sov, lub tshuab nqus tsev annealing txheej txheem ntawm qhov sib txawv ntawm qhov kev ua tau zoo ntawm kev ua haujlwm tom ntej yuav ua lub luag haujlwm txiav txim siab.

Tsis tas li ntawd, nws tseem yuav tsum tau kawm txog cov nyhuv dehydrogenation ntawm qhov sib txawv ntawm lub tshuab nqus tsev kom txo tau cov ntsiab lus hydrogen ntawm txheej txheej ntawm titanium alloys kom muaj kev nyab xeeb, tshem tawm qhov muaj peev xwm ntawm hydrogen embrittlement thiab tsis txhob ua cov kab nrib pleb.
Titanium daim txhuam cev, siab purity aluminium (99.99%) thiab aluminium-vanadium alloys yog melted nyob rau hauv lub tshuab nqus tsev melting rauv nyob rau hauv ib tug tej yam piv. 3.7mm semi-tiav daim ntawv yog tsim los ntawm forging thiab dov.

Cov cua kub kub yog 980 degree txog 1020 degree thaum ua haujlwm kub. Nws tau pom tias cov microstructure tau txais los ntawm thermal deformation nrog tus nqi deformation ntawm 95% muaj qhov pom tseeb ntawm cov kab lis kev cai qub, cov theem pom tseeb hauv cov ciam teb, thiab cov theem coarser hauv cov muaju, uas yog koob zoo li. thiab periodic. Lub ntsiab yog vim li cas rau lub koom haum no yog hais tias tus thawj billet yog rhuab los yog deformed nyob rau hauv lub cheeb tsam -phase, los yog cov thawj billet yog nqa tawm nyob rau hauv lub -phase cheeb tsam, thaum lub deformation tshwm sim nyob rau hauv lub cheeb tsam + -theem. Me me.

Cov ciam teb tsis tau recrystallized vim tsis muaj deformation. Lub microstructure muaj tsis zoo plasticity thiab siab zog. Intermediate recrystallization annealing yuav tsum tau txhim kho nws cov yas thiab lub zog thiab tsim kom muaj kev sib haum xeeb deformation rau kev ua haujlwm txias. Nws tseem pom tau tias cov nplej nyob rau hauv qhov chaw deformed tag nrho yog qhov zoo thiab pom tseeb elongated.

Thawj cov qauv 3.7 hli tau muab tso rau hauv lub tshuab nqus tsev vacuum annealing, thiab plaub qhov qauv uas tsis zoo tshaj plaws tau raug xaiv. Cov kev kho annealing yog 78 0 degree ± 2 degree, 800 degree ± 2 degree, 820 degree ± 2 degree, 830 degree ± 2 degree, nqus tsawg dua lossis sib npaug li 0.02 Pa rau 2 teev, thiab 200 degree tawm ntawm lub cub tawg. Cov khoom tensile thiab hydrogen cov ntsiab lus ntawm chav tsev kub tau ntsuas. Cov txiaj ntsig kev xeem tau pom tias:

(1) Annealing tswj ntawm 800 degree ± 2 degree thiab tuav lub sij hawm ntawm 2 teev ua rau qis yield zog thiab cov khoom yas siab tshaj plaws.

(2) Kev tswj hwm ntawm 800 degree ± 2 degree thiab 2 h ntawm kev tuav lub sijhawm ua rau muaj kev ruaj khov + theem network.

(3) Raws li lub tshuab nqus tsev vacuum uas twb muaj lawm Less than los yog sib npaug rau 0.02Pa, ntawm 800 degree ± 2 degree, tuav lub sij hawm ntawm 2 teev, qhov nruab nrab hydrogen ntsiab lus ntawm 0.009% qis dua tus qauv qub kom ua tiav cov txiaj ntsig ntawm dehydrogenation, kom ua tiav cov haujlwm ua haujlwm txias hauv qab no yuav tsis tsim cov hydrogen embrittlement (hloov tawg) ntawm qib kev nyab xeeb.