Explanation

structural steel suitable for quenching and tempering treatment (quenching to martensite and then high temperature tempering at 500-650 ° C). After quenching and tempering treatment, the strength, plasticity and toughness of steel are well matched. The chemical composition of quenched and tempered steel is 0? 25%? For 0.5% medium carbon non-alloy steel or low alloy steel and medium alloy steel, the microstructure after quenching and tempering heat treatment is tempering sorbite. quenched and tempered steel is the most widely used steel in mechanical structural steel. There are many steel designation. Typical steel designation include 45, 40Cr, 40C'rMo, 40CrNiMo, 40MnB, etc. quenched and tempered steel is widely used for structural parts of various mechanical equipment, such as shafts, sleeves, small and medium modulus gears, connecting rods, pins, etc. Local induction heating quenching is often carried out for parts that need to bear greater stress.

Classification