Kev kub ceev steel (HSS) yog cov cuab yeej hlau uas muaj qhov tawv tawv, hnav tsis kam thiab kub kub ua haujlwm, tseem hu ua cov cuab yeej kub ceev steel lossis pem hauv ntej steel, feem ntau hu ua hlau dawb.
Kev kub ceev steel muaj kev ua tau zoo thev naus laus zis thiab kev sib xyaw ua ke zoo ntawm lub zog thiab lub zog, yog li nws tsuas yog siv los tsim cov txheej nyias nyias thiab cov cuab yeej tiv thaiv hlau txiav, nrog rau cov kabmob kub thiab txias extrusion tuag. Ntxiv nrog rau kev kub ceev hlau ua los ntawm smelting, cov hmoov metallurgy kev kub ceev steel tau tshwm sim tom qab xyoo 1960. Nws qhov zoo dua yog kom tsis txhob txo cov khoom siv hluav taws xob thiab kev kho cua sov deformation los ntawm carbide segregation los ntawm smelting.
Kev kho cua sov txheej txheem ntawm kev kub ceev steel yog qhov nyuaj, uas yuav tsum tau mus los ntawm cov txheej txheem xws li quenching thiab tempering. Quenching feem ntau yog ua nyob rau hauv ob theem vim nws tsis zoo thermal conductivity. Ua ntej, preheat ntawm 800 ~ 850 degree (kom tsis txhob ua rau muaj kev ntxhov siab loj), tom qab ntawd sai sai rau lub quenching kub ntawm 1190 ~ 1290 degree (ntau hom muaj qhov sib txawv ntawm qhov kub ntawm qhov siv tiag), thiab tom qab ntawd roj txias, cua txias lossis roj puv. cua txias. Lub qhov cub ntsev yog siv rau cua sov hauv lub hoobkas, thiab lub tshuab nqus tsev vacuum kuj tau siv dav. Tom qab quenching, ib feem ntawm khaws cia austenite (kwv yees li 30 feem pua) tsis tau hloov mus rau hauv martensite, uas cuam tshuam rau cov khoom ntawm high-speed steel. Txhawm rau hloov cov austenite residual thiab ntxiv txhim kho qhov tawv thiab hnav tsis kam, feem ntau yuav tsum tau ua 2 ~ 3 zaug ntawm tempering ntawm 560 degree, thiab txhua zaus tuav 1 teev.
