Tom qab quenching thiab tempering kev kho mob ntawm seamless kav, cov khoom tsim muaj cov khoom zoo txhua yam thiab tau dav siv nyob rau hauv ntau yam tseem ceeb yam ntxwv, tshwj xeeb tshaj yog cov txuas rods, bolts, zog thiab shafts uas ua hauj lwm nyob rau hauv alternating loads. Tab sis lub hardness saum npoo yog tsawg thiab tsis hnav-resistant. Tempering + nto quenching tuaj yeem siv los txhim kho qhov nyuaj ntawm qhov chaw.

Nws cov tshuaj muaj pes tsawg leeg muaj carbon (C) cov ntsiab lus ntawm 0.42 ~ 0.50%, Si cov ntsiab lus ntawm 0.17 ~ 0.37%, Mn ntsiab lus ntawm 0.50 ~ 0.80%, thiab Cr cov ntsiab lus <= 0.25%.
Pom zoo kho cua sov kub: normalizing 850 ° C, quenching 840 ° C, tempering 600 ° C.

Cov kav dej seamless steel feem ntau yog ua los ntawm cov khoom siv zoo carbon steel, uas tsis nyuaj heev thiab yooj yim rau txiav. Nws yog feem ntau siv hauv pwm los ua cov qauv, cov lus qhia, cov lus qhia, thiab lwm yam, tab sis yuav tsum tau kho cua sov.

1. Tom qab quenching thiab ua ntej tempering, lub hardness ntawm cov hlau yog ntau tshaj HRC55, uas yog tsim nyog.
Qhov siab tshaj plaws hardness rau kev siv tswv yim yog HRC55 (high zaus quenching HRC58).

2. Tsis txhob siv cov txheej txheem kev kho cua sov ntawm carburizing thiab quenching rau hlau.
Tom qab quenching thiab tempering, cov khoom muaj cov cuab yeej zoo txhua yam thiab tau siv dav hauv ntau yam qauv tseem ceeb, tshwj xeeb tshaj yog cov txuas txuas, bolts, lub zog thiab cov ncej uas ua haujlwm nyob rau hauv cov khoom sib hloov. Tab sis lub hardness saum npoo yog tsawg thiab tsis hnav-resistant. Tempering + nto quenching tuaj yeem siv los txhim kho qhov nyuaj ntawm qhov chaw.

Carburizing kev kho mob feem ntau yog siv rau cov khoom hnyav uas muaj qhov hnav-tiv taus thiab cuam tshuam-resistant tub ntxhais, thiab nws hnav tsis kam yog siab dua quenching thiab tempering + nto quenching. Cov ntsiab lus carbon nyob rau saum npoo yog 0.8-1.2%, thiab cov tub ntxhais feem ntau yog 0.1-0.25% (0.35% yog siv tshwj xeeb). Tom qab kev kho cua sov, qhov saum npoo tuaj yeem tau txais cov tawv tawv heev (HRC58-62), thiab cov tub ntxhais muaj qhov nyuaj thiab qhov cuam tshuam tsis zoo.