1. Cov teebmeem ntawm cua sov
(a) Optimal (850-1050 degree)
Kev tsim: Uniform Austenite (mos, ductile, zoo tagnrho rau deformation).
Cov Khoom Siv: Yooj yim rau worge / yob; Tshaj tawm - cua txias ferrite - hlaws micrubtructure ua kom muaj zog sib npaug (ntau dua los yog sib npaug ntawm 345 mpa) thiab tawv. CR / CU Dissolves tusyees, khaws cia huab cua tsis kam.
(b) communkively (<850°C)
Kev tsim: Tsis tiav Austenitization (residual nyuaj ferrite / Pumblite).
Cov Khoom Siv: Tsis muaj zog ua haujlwm (nquag mus tawg); tsis ncaj lub zog / toughness.
(c) Overheating (>1050 Qib)
Kev tsim: Coarse Austenite; Cr / Cu Segregates ntawm cov ciaj ciam nplej.
Cov Khoom Siv: Txo cov tawv tawv (cov nplej co coarse); tsis ncaj patina tsim (muaj zog tiv thaiv huab cua tsis kam); Nplai nplai / decarburization.
2. Qhov mob ntawm cov neeg txias
(a) qeeb (cua / rauv taws txias - txheem)
Kev tsim: Zoo ferrite - pumlite.
Cov Khoom Siv: Ntsuas kom muaj zog / ductility (elongation ntau dua lossis sib npaug rau 20%); siab tawv; Txawm tias CR / CU faib khoom (huab cua tsis kam).
(b) nruab nrab (ua kom cua)
Kev tsim: Ferrite - bainite (finer nplej).
Cov Khoom Siv: Lub zog siab (400-450 mpa); kev sib deev me ntsis; kev tuav rawv.
(c) sai sai (dej quenching - tsis tshua muaj siv)
Kev tsim: Brittle martensite.
Cov Khoom Siv: Kev tawv tawv heev tab sis ze - xoom ductility (nquag mus tawg); Neeg tsis muaj hwj chim weldability; Kev ntxhov siab corrosion kev pheej hmoo.
