Cov yam ntxwv cuam tshuam rau lub sijhawm tuav ntawm lub workpiece hauv lub sim hluav taws xob rauv

1. Qhov kub thiab txias

Raws li ib txwm muaj, cov ntaub ntawv empirical feem ntau yog siv rau kev suav hauv kev sim hluav taws xob rauv taws. Piv txwv li, carbon hlau feem ntau yog xam ntawm 1min / 1mm, thaum alloy hlau yog 1.3 txog 1.8 npaug ntawm cov hlau. Yog vim li cas yog tias alloy hlau muaj cov ntsiab lus siab ntawm cov ntsiab lus alloying. Tab sis ntawm qhov kub thiab txias (1000 ℃), yog tias qhov ua tau zoo tuab loj, qhov kev txwv qis ntawm cov coefficient no yog siv, thiab qhov txwv sab saud ntawm cov tuab tuab yog me me.

2. Qhov sib txawv ntawm cov qib steel

Rau cov pa roj carbon steel thiab cov hlau tsis tshua muaj hlau, lub sij hawm xav tau rau kev sib cais ntawm cov carbides thiab homogenization ntawm austenite yog luv heev, yog li raws li qhov xwm txheej, “zero” kub preservation quenching yuav siv tau, uas tuaj yeem txo cov txheej txheem voj voog thiab txo quenching tawg. Rau high-alloy steel, lub quenching cua sov thiab tuav lub sij hawm yuav tsum tau tsim nyog txuas ntxiv mus kom lub dissolution thiab austenitization ntawm carbides. Nws tuaj yeem kwv yees li ntawm 0.5 txog 0.8min ib millimeter rau lub sijhawm tuav. Thaum lub siab txwv ntawm quenching kub yog 0.5min, quenching kub nyob ntawm Siv 0.8min ntawm qhov txwv qis.