(1) Yuav ua kom cov hlau muaj cov yas siab, muaj zog thiab tsim nyog lub zog, cov hlau yog kub ntawm qhov siab txog li 400-500 ° C, thiab cov hlau uas muaj qhov sov npau taws yuav tsum ceev nrooj tom qab npau taws suppress tempering. Brittleness tshwm sim.
(2) Yog tias qhov yuav tsum tau muaj lub zog tshwj xeeb tshaj plaws, nws muaj kev kub ntxhov li ntawm 200 ° C kom tau txais cov qauv nruab nrab ntawm cov tshuaj carbonated tempered martensite.
(2) Caij nplooj ntoos hlav hlau:
1. Ntxawm: quenching ntawm 830-870 ° C.
2. Kub cev: kub txog ntawm 420-520 ° C kom tau txais cov qauv ua kom muaj tus kab mob troostite.