Dab tsi qib yuav carbon steel kav decarburize tom qab kev kho cua sov?

Thaum cov pa roj carbon steel yog rhuab mus rau qhov kub thiab txias thiab tom qab ib lub sijhawm, ib txheej decarburized yuav tshwm sim ntawm cov hlau. Cov yam ntxwv ntawm cov txheej txheem decarburized: cov pa roj carbon nyob rau hauv cov txheej txheem decarburized yog oxidized, uas qhia txog nws cov tshuaj muaj pes tsawg leeg uas nws cov ntsiab lus carbon qis dua li cov qauv qub; Reflected nyob rau hauv metallographic qauv, tus nqi ntawm cementite (Fe3C) yog tsawg dua li cov ntaub so ntswg ib txwm; reflected nyob rau hauv txhua yam khoom, nws lub zog los yog hardness yog qis dua li cov ntaub so ntswg.
Raws li cov cua kub kub nce, qhov tob ntawm decarburization txheej tseem nce ntxiv. Feem ntau, thaum qhov kub thiab txias qis dua 1000 degree, oxide nplai ntawm cov hlau nto cuam tshuam cov pa roj carbon diffusion, thiab decarburization qeeb dua oxidation. Txawm li cas los xij, raws li qhov kub thiab txias, ntawm ib sab, qhov tsim ntawm oxide nplai nce; Ntawm qhov tod tes, qhov diffusion tus nqi ntawm carbon nyob rau hauv oxide nplai kuj accelerates. Lub sijhawm no, oxide nplai poob nws lub peev xwm tiv thaiv, thiab decarburization sai dua oxidation tom qab ncav cuag qhov kub thiab txias.
Lub sijhawm cua sov ntev dua, lub sijhawm cua sov ntau dua, thiab qhov tob ntawm decarburization txheej, tab sis txheej decarburization tsis nce ntxiv rau lub sijhawm. Piv txwv li, decarburized txheej ntawm high-speed steel ncav cuag qhov tob ntawm 0.4mm thaum rhuab ntawm 1000 degree rau 0.5h; qhov tob ntawm 1.0 hli tom qab 4h; thiab qhov tob ntawm 1.2 hli tom qab 12h.