Dapeng Town Industrial Park, Tongshan District, Xuzhou City, Jiangsu Province, China
The properties of steel for space frame of steel structure depend not only on its chemical composition, but also on the state of its internal structure. The heat treatment of steel is a processing technology that changes its structure through heating, heat preservation and different cooling methods in a solid state to meet performance requirements.
Heat treatment has great significance in the manufacturing process of mechanical parts. It can not only improve the performance of mechanical parts and improve product quality, but also save metal materials and improve the processing technology.
According to different purposes, heating conditions and characteristics, heat treatment can be divided into the following three categories.
The overall heat treatment of steel refers to penetrating heating of the workpiece to improve the overall structure and performance. It is generally divided into annealing, normalizing, quenching and tempering.
Surface heat treatment is a process in which only the surface of workpiece is heat treated. The most common surface heat treatment is surface quenching.
Chemical heat treatment is a process that allows the active atoms in the medium to penetrate the surface of workpiece in order to change the chemical composition, organization and performance. Common chemical heat treatments include carburizing, nitriding, carbonitriding, etc.
