Materjali użati komunement għal vireg bil-kamin

Commonly used screw rod materials in my country include 45# steel, 40Cr, amine steel, 38CrMOAl, high temperature alloys, etc. 1) 45# steel is cheap and has good processing performance, but poor wear and corrosion resistance. Heat treatment: quenching and tempering HB220-270, high frequency quenching HRC45--48. 2) The performance of 40Cr is better than that of 45# steel, but it is often plated with a layer of chromium to improve its corrosion resistance and wear resistance. However, the requirements for the chrome plating layer are high. If the plating layer is too thin, it is easy to wear, and if it is too thick, it is easy to peel off. After peeling off, it accelerates corrosion and has been less used. Heat treatment: quenching and tempering HB220-270, hard chrome plating HRC>553) L-azzar nitrided u 38Crmoal għandhom prestazzjoni komprensiva relattivament eċċellenti u jintużaw ħafna. Ġeneralment, is-saff nitrided jilħaq 0. 4-0. 6 mm. Madankollu, dan il-materjal għandu reżistenza baxxa għall-korrużjoni tal-klorur tal-idroġenu u huwa relattivament għali. 4) Materjal ta 'liga ta' temperatura għolja huwa superjuri għal materjali oħra. Dan il-materjal m'għandux bżonn kisi u huwa prinċipalment użat għal viti bla aloġenu ta 'magni tal-iffurmar tal-injezzjoni. Dan il-materjal għandu reżistenza għolja ta 'ossidazzjoni u reżistenza għall-korrużjoni. Trattament tas-sħana HRA55`60.