Cov khoom siv ntsia hlau ntau hauv kuv lub tebchaws suav nrog 45 steel, 40Cr, nitrided steel, 38CrMoAl, thiab siab- kub alloys.
1) 45 steel yog pheej yig thiab muaj machinability zoo, tab sis tsis zoo hnav thiab corrosion kuj. Kev kho cua sov: quenching thiab temper HB220-270, high-frequency quenching HRC45-48.
2) 40Cr has better performance than 45 steel, but it often needs to be plated with a layer of chromium to improve its corrosion and wear resistance. However, the chromium plating layer has high requirements; too thin a layer is prone to wear, while too thick a layer is prone to peeling, which accelerates corrosion. Therefore, it is less commonly used. Heat treatment: quench and temper HB220-270, hard chromium plating HRC>55.
3) Nitrided steel thiab 38CrMoAl muaj kev ua tau zoo tag nrho thiab tau siv dav. Cov txheej nitriding feem ntau yog 0.4-0.6 hli tuab. Txawm li cas los xij, cov khoom no muaj qhov tsis zoo rau hydrogen chloride corrosion thiab kuj kim heev.
4) High - cov ntaub ntawv kub ntawm cov ntaub ntawv alloy zoo dua li lwm cov ntaub ntawv. Cov khoom no tsis tas yuav plating thiab feem ntau yog siv los ua halogen-cov ntsia hlau dawb hauv cov tshuab txhaj tshuaj molding. Cov khoom no muaj oxidation siab thiab corrosion kuj thiab tuaj yeem kho cua sov rau 55-60 degrees Celsius.
