Usually the heat treatment of claw hammer includes three processes of heating, holding and cooling, but sometimes only two processes of heating and cooling are required. Under normal circumstances, these three processes are interconnected without interruption. It can be roughly divided into direct heating and indirect heating. Charcoal, coal, liquid and gas fuels and electric heating are direct heating; molten salt or metal, even floating particles can be used for indirect heating.
When heated, claw hammers are exposed to air, and oxidation and decarburization often occurs. This has a very detrimental effect on the surface properties of the parts after heat treatment. You have to pay attention to methods and methods to better enhance product performance.