Cov ntsiab lus tseem ceeb & Cov Ntsiab Cai
1.1 Annealed State (O State, raws li ASTM Standards)
Txheej txheem txheej txheem:
Cua sov: Kub lub tooj liab alloy mus rau qhov kub thiab txias300-950 ° F (572-1742 ° F)(Nws txawv ntawm hom alloy: piv txwv li, tooj liab ntshiab ≈ 450-650 degree; tooj dag ≈ 400-700 degree; bronze ≈ 500-850℃). Qhov kub yog feem ntau 50-100℃saum toj no lub alloy lub recrystallization kub kom paub meej recrystallization tiav.
Soaking: Tuav cov khoom ntawm lub hom phiaj kub rau30 feeb mus rau 4 teev(nyob ntawm thickness thiab alloy) tso cai rau diffusion ntawm atoms thiab tshem tawm ntawm residual stresses.
Txias: Txias maj mam (piv txwv li, qhov cub txias, cua txias rau qis- carbon tooj liab alloys) ntawm tus nqi ntawm50-200℃/ teevkom tsis txhob rov ua kom muaj kev ntxhov siab lossis tsim cov theem tsis ruaj khov.
Microstructural Hloov:
Tshem tawm kev ua haujlwm nyuaj (los ntawm kev sib tw txias, forging, lossis kos duab) los ntawm kev tsim tshiab, lim- cov nplej dawb equiaxed.
Txo cov kev ntxhov siab sab hauv (xws li, los ntawm vuam lossis machining) uas tuaj yeem ua rau deformation lossis tawg hauv kev pabcuam.
Homogenizes tshuaj muaj pes tsawg leeg (tseem ceeb rau cam khwb cia alloys nrog segregation) thiab dissolves nkig precipitates (xws li, Cu₂O nyob rau hauv oxygen- bearing tooj liab).
1.2 Quenched State (H Xeev nrog Quenching, lossis Q State)
Txheej txheem txheej txheem:
Cua sov: Kub lub alloy rau700-980 ° F (1292-1796 ° F)(sab saum toj no lub solidus kub rau cov khoom-solution alloys, piv txwv li, Cu-Cr-Zr, Cu-Ni-Si) kom yaj alloying ntsiab rau hauv cov tooj liab matrix.
Soaking: Tuav ntawm qhov kub thiab txias rau15-60 feeblos xyuas kom meej cov khoom sib xws - kev daws teeb meem.
Kev txias txias: Txias cov khoom siv sai sai siv cov xov xwm xws li dej, roj, lossis cua txias (txias tus nqi siab dua lossis sib npaug li 100℃/ thib ob) los tiv thaiv nag lossis daus ntawm alloying ntsiab lossis theem hloov pauv.
Microstructural Hloov:
Khaws ib qho kev daws teeb meem supersaturated (alloying ntsiab zoo li Cr, Zr, los yog Ni nyob twj ywm nyob rau hauv lub tooj liab matrix es tsis txhob ua precipitates).
Cov ntaub ntawv zoo-grained los yog txawm nanocrystalline cov qauv vim yog inhibited grain loj hlob thaum lub sij hawm txias ceev.
Qhia txog kev ntxhov siab hauv nruab nrab (tsawg dua ua haujlwm txias) thiab tuaj yeem tsim cov theem martensitic lossis bainitic hauv qee cov tooj liab alloys (xws li Cu-Be alloys).
