Pogosto uporabljeni materiali za navojne palice

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) Nitrirano jeklo in 38crmoal imata sorazmerno odlične celovite zmogljivosti in se široko uporabljata. Na splošno nitrirani sloj doseže 0. 4-0. 6 mm. Vendar ima ta material nizko odpornost proti koroziji vodikovega klorida in je relativno drag. 4) Material z zlitinami visoke temperature je boljši od drugih materialov. Ta material ne potrebuje premaza in se uporablja predvsem za vijake brez halogenskih strojev za brizganje. Ta material ima visoko oksidacijsko odpornost in korozijsko odpornost. Toplotno obdelavo HRA55`60.