Annealing treatment
Annealing is a metal heat treatment process that refers to heating the metal slowly to a certain temperature, keeping for sufficient time, and then cooling at a suitable speed.The purpose is to reduce hardness, improve the cutting and processing performance; reduce residual stress, stabilize size, reduce deformation and crack tendency; adjust Microtissue, and eliminate Microtissue defects.
Solution treatment
Solution treatment refers to the heat treatment process of heating the alloy to the high temperature single-phase area at constant temperature, so that the excess phase is fully dissolved into the solute after rapid cooling, so as to obtain the oversaturated solute.
Normalizing treatment
Normalizing treatment is a heat treatment that improves the steel toughness. After heating the steel upto 30-50℃ above ac3 temperature, keeping for a period of time, then cooling in the air..The main characteristic is that the cooling speed is faster than annealing and lower than quenching, refining the crystal grain of steel in slightly faster cooling speed, which can not only get satisfactory strength, but also can significantly improve the toughness (akv value) and reduce the cracking tendency of components.
Tempering treatment
Tempering treatment is a treatment method that cooling steel after hardened or normalized treatment that below a critical temperature for a certain time to increase the toughness of the material.
Quenching treatment
Quenching is a heat treatment process that heating the steel to the austenite temperature, the critical temperature ac3(sub-coanalysis steel) or ac1(over-coanalysis steel), to obtain all or part of the austenite, then cooling fast to transition of martensite
Induction hardening
Induction hardening is the quenching method that uses electromagnetic induction to heat the part surface quickly and then cold it fast
