Yuav ua li cas soj ntsuam metallographic tom qab quenching nyob rau hauv induction cua sov rauv?

Metallographic kuaj ntawm pearlite ductile hlau qhov chaw tom qab induction cua sov cua sov quenching yuav tsum tau ua raws li JB / T 9205-2008 “Induction cua sov rauv quenching metallographic soj ntsuam ntawm pearlite ductile hlau qhov chaw”

1) Tom qab pearlitic ductile hlau castings yog quenched nyob rau hauv high- thiab intermediate-frequency induction cua sov rauv thiab low-temperature tempering (W200T), metallographic qauv yuav tsum tau muab coj mus rau hauv nruab nrab ntawm lub induction quenching cheeb tsam los yog ntawm qhov chaw teev los ntawm cov kev tej yam kev mob.

2) Tom qab sib tsoo, cov qauv metallographic yog etched nrog cov kua dej cawv uas muaj 2% mus rau 5% nitric acid los ntawm ntim kom txog rau thaum cov txheej txheem tawv tawv pom.

3) Raws li cov lus qhia kev faib tawm microstructure qhia hauv Table 6.2 thiab daim ntawv qhia kev faib tawm microstructure hauv JB / T 9205-2008, ua qhov kev ntsuam xyuas metallographic. Ntawm lawv, qib 3 txog 6 yog tsim nyog; thaum muaj cov kev cai tshwj xeeb, lawv yuav tsum tau ua raws li cov ntaub ntawv tseem ceeb.

Table 6-2 Kev piav qhia ntawm microstructure kev faib tawm ntawm pearlite ductile hlau castings tom qab quenching nyob rau hauv induction cua sov rauv