色永久第一色_精品日韩人妻一区二区_国产同性恋精品无码视频_亚洲av日韩av偷拍偷拍_亚洲嫩草AV永久无码_性爱视频一区二区免费看_91啪啪精品_黄色视频A片区_国产91啪视频好日子_一区二区三区大香蕉_亚洲无线观码_人操欧美视频_诱人熟女亚洲_久久久久,黄色一级片_av嫩草

NEWS

Overview of heat treatment methods for precision piston rod materials

As we all know, precision piston rods are a widely used connecting component that can be applied to almost all mechanical products. Its commonly used materials mainly include steel grades 45, 40Cr, 2Cr13, and other steels, which require specific treatment processes such as electroplating and heat treatment to obtain specific properties and meet certain needs. Therefore, it must undergo heat treatment to obtain good strength, surface hardness, corrosion resistance, friction resistance, and bite resistance. The material heat treatment methods for precision piston rods include:
1. 45 # steel
Heat treatment process: preparation heat treatment - low-temperature spheroidizing annealing - quenching - critical temperature quenching - high-frequency quenching
2. 40Cr
Heat treatment process: preparation heat treatment - elimination of internal stress in the workpiece - quenching and tempering operations - workpiece quality inspection
3. 2Cr13
Heat treatment process: preparation heat treatment process - quenching and tempering treatment - stress relief treatment - high-frequency quenching, low-temperature tempering