Feem ntau cov hlaws saws yuav tsum tau ua raws li cov txheej txheem kev kho cua sov uas yog cov khoom siv lub cev ntawm cov hlau hloov ua kom cov khoom siv zog thiab ua kom cov khoom siv tiv thaiv lub zog tsim tawm thaum txiav. Cov khoom yog rhuab mus rau ntawm 860 ° C thiab 1100 ° C, nyob ntawm seb hom khoom, thiab ces txias txias (quenched). Cov txheej txheem no hu ua hardening. Tom qab hardening, cov saws yuav tsum tau tempered nyob rau hauv pob kom txo cov hardness thiab nce lub toughness ntawm cov hniav. Ntawm no cov hniav yog clamped nyob rau hauv pob thiab rhuab maj mam mus rau ntawm 350 ° C thiab 560 ° C, nyob ntawm seb cov khoom, thiab ces txias maj mam mus rau ambient kub.