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Quenching, tempering, normalizing, annealing, silly unclear
Release time:
2020-01-02
Precision Mould and High-end Equipment Manufacturing Industry Dominates the Future Precision Mould and High-end Equipment Manufacturing Industry Dominates the Future Precision Mould and High-end Equipment Manufacturing Industry Dominates the Future Precision Mould and High-end Equipment Manufacturing Industry Dominates the Future Precision Mould and High-end Equipment Manufacturing Industry Dominates the Future!!
What is quenching?
steel quenching is to heat the steel to the critical temperature Ac3 (hypoeutectoid steel) or Ac1 (hypereutectoid steel) above the temperature, holding for a period of time, so that all or part of the austenitization, and then at a cooling rate greater than the critical cooling rate to Ms below (or Ms near isothermal) martensitic (or bainite) transformation heat treatment process. Usually, the solution treatment of aluminum alloy, copper alloy, titanium alloy, tempered glass and other materials or the heat treatment process with rapid cooling process is called quenching
The purpose of quenching:
1) Improve the mechanical properties of metal products or parts. For example: improve the hardness and wear resistance of tools, bearings, etc., improve the elastic limit of springs, improve the comprehensive mechanical properties of shaft parts, etc.
2) improve the material properties or chemical properties of some special steels. Such as improving the corrosion resistance of stainless steel, increasing the permanent magnetism of magnetic steel, etc.
quenching cooling, in addition to the need for reasonable selection of quenching medium, but also the correct quenching method, commonly used quenching methods, mainly single liquid quenching, double liquid quenching, grading quenching, isothermal quenching, local quenching and other
steel workpieces after quenching has the following characteristics:
① obtained unbalanced (I .e. unstable) structures such as martensite, bainite and residual austenite.
② has large internal stress.
③ mechanical properties cannot meet the requirements. Therefore, steel workpieces are generally tempered after quenching.
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2020-12-10
Kunshan Jiafengsheng Precision Electronics Co., Ltd.
Contact: Hu Guang
Tel: 0512-50132658
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