Hardness test method of protective cover of linear sliding unit
How to detect the hardness of the protective cover of the linear sliding unit
The properties of the protective cover of the linear sliding unit directly affect the quality of the processing, and the hardness value is an important index that determines the processing of the casting.
1. Brinell hardness: Mainly used to determine the hardness of castings, forgings, non-ferrous metal parts, hot-rolled blanks and annealed parts, and the measurement range is ≯ HB450.
2. Rockwell hardness: HRA is mainly used for high-hardness specimens to determine the hardness of materials and surface hardness above HRC67, such as cemented carbide, nitrided steel, etc., and the measurement range is HRA>70. HRC is mainly used to determine the hardness of steel parts (such as carbon steel, tool steel, alloy steel, etc.) after quenching or tempering, and the measurement range is HRC20~67.
3. Vickers hardness: used to determine the hardness of thin parts and guide rail guards, and can also be used to determine the hardness of surface hardening machine tool castings such as carburizing, cyanidation, and nitriding.
