The role of the Leeb hardness tester

Material 5CrMnMo hot forging largely dies fail due to early wear and collapse of the hardness tester.

When it is testing the hardness of the wear zone with a Leeb hardness tester, it was found that the hardness value of the grinding was lower than the hardness (38-42HRC) tested before unused in the range of 32-34HRC. This shows the second stage of the heating of the ultrasonic pencil hardness tester in the red hot blank (>10000C) .the heating of the blank in the cavity can be roughly divided into four stages, when the heat is about 80% to 85%, due to the cavity wall thick heat dissipation is slow, and the temperature of shore hardness tester is as high as 6500C or more. When the mold cavity is heated due to conduction, the temperature exceeds the mold temperature, the mold is in the process of continuous tempering in the working process, and changes in the structure and properties will continue to occur, resulting in a decrease in the hardness value of the wear area and the occurrence of heat abrasion indicates that 5CrMnMo, a hot work die steel is not suitable for large molds. It is more suitable to use shore hardness gauge tester die steels such as 3Cr2W8V, 3Cr3Mo3VNb, such as thermal stability, thermal strength, and yield strength when using 600~6500C hot working molds in the temperature zone than 5CrMnMo.

As China's industrialization process is still far from being completed, there is an urgent need to strive to shorten the gap with the international advanced manufacturing level. As companies must understand the heat treatment industry from a strategic perspective, foam hardness tester is not only equipment, processes, and especially testing equipment are in urgent need of constant drawing on new technologies at home and abroad depends on actual production and application in heat treatment companies. This is a very sensible measure, because there are five-year transitional periods for the WTO rules after China’s accession to the WTO. This is a crucial period for China's manufacturing industry. The key reason is that it is manufactured after China’s transition period. digital hardness tester will basically be in the same competitive position as foreign large companies, and during this transitional period, we can still fully prepare to enhance our competitiveness, so this is a very urgent requirement for companies.