Chemical wear: At some temperatures, the tool material acts chemically with some surrounding media, forming a layer of compounds with lower hardness on the surface of the tool, which is wiped off by chips or workpieces to form wear, becoming chemical wear, phase change wear: when When the cutting temperature reaches or exceeds the phase transition temperature of the tool material, the metallographic structure in the tool material will change, and the hardness will decrease significantly, and the resulting tool wear is called phase transition wear.

Special attention should also be paid to tool geometry and coating.

Adhesive wear: When cutting, there is a lot of pressure and strong friction between the chips, the workpiece and the front and flank surfaces, forming fresh surface contact and cold welding bonding. Since the chips generate shear damage during the sliding process, the tool material is taken away, resulting in adhesive wear.

Diffusion wear: At high cutting temperatures, the tool wear caused by the mutual diffusion and replacement of alloy elements in the workpiece and the tool material in the solid state is called diffusion wear.

Hard spot wear: When cutting, the chips and workpiece materials contain some hard spots such as carbides, nitrides and oxides, as well as built-up edge fragments, etc., which can carve grooves on the surface of the tool, which is abrasive wear.

Ningbo Tiangong Great Star Tools Co.,Ltd since 1971,enjoys great prestige in the professional manufacture hand tools company of the circle and now is the important production foundation for hand tools.Ningbo Tiangong Great Star Tools Co.,Ltd has developed from steel file and hundred RMB net capital into a corporation with 280 employees and more than 0.1 billion RMB net assets.Ningbo Tiangong Great Star Tools Co.,Ltd since 1958. The registering capital is about 4.15 million RMB.