The 16th China International Machine Tool Exhibition will be held in Beijing Shunyi International Exhibition Center on 17-21, and Johoyd Instrument will hold a 5-day exhibition. New and old friends are welcome.
The 61st China Higher Education Expo will be held in Fuzhou Strait International Convention and Exhibition Center on April 15-17, 2024. Booth No. of Johoyd Instrument: 2A91 brings many metallographic sample preparation equipment and various hardness testers to the exhibition, providing various unive...
1. Quenched and tempered steel
The hardness test of quenched and tempered steel mainly uses Rockwell hardness tester HRC scale. If the material is thin and HRC scale is not suitable, HRA scale can be used instead. If the material is thinner, surface Rockwell hardness scales HR15N, HR30N, or HR45N ca...
1. Use Vickers hardness tester of welded parts (Weld Vickers hardness test) method:
Since the microstructure of the joint part of the weldment (weld seam) during welding will change during the formation process, it may form a weak link in the welded structure. The hardness of the welding can...
Leeb Hardness TesterAt present, the Leeb hardness tester is widely used in the hardness testing of castings. The Leeb hardness tester adopts the principle of dynamic hardness testing and uses computer technology to realize the miniaturization and electronicization of the hardness tester. It is simpl...
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