Kev sib tsoo cov pas nrig yog raug rau kev kho cua sov tshwj xeeb, uas ua kom qis qis thiab tsim kua muag, siab hardness (45-55 HRC), zoo heev thiab hnav tsis kam uas yog 1.5-2 npaug ntawm cov khoom siv zoo tib yam.
Cov txheej txheem ntau lawm yog siv, thiab qhov loj thiab specification ntawm cov khoom yuav muab raws nraim raws li tus neeg yuav tsum tau muaj.Tom qab quenching thiab tempering, qhov kev ntxhov siab sab hauv yog relieved;Tom qab ntawd tus pas nrig nthuav tawm cov yam ntxwv zoo ntawm kev tsis tawg thiab ncaj tsis muaj dabtsi yog khoov, nrog rau, tsis muaj kev sib tw ntawm ob qhov kawg.Zoo hnav tsis kam txo tus nqi zoo heev rau cov neeg siv khoom.Flexibility yog txhim kho zoo heev thiab zam pov tseg tsis tsim nyog.