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Tools, dies, tool of the need for surface coating

Danyang Daming tools S.L. | Updated: Jul 16, 2015

1. coating properties

(1) the hardness

High surface hardness coating is one of the best ways to increase the life of the tool. In General, the greater the hardness of the material or the surface tool life of and more. TiCN coating (TiCN) of (TiN) Titanium Nitride coating has high hardness. Due to increasing carbon content, hardness makes TiCN coating 33% above hardness range Hv3000 ~ 4000 (depending on manufacturer). Surface hardness up to CVD diamond film coated tool application Hv9000 has become more mature, compare with PVD coated tools, 10 ~ 20 times more life of the CVD diamond film coated tools. Hardness of the coating of diamond and cutting speed can be 2 ~ 3 times more that the capabilities of the tool makes a good choice for machining non-ferrous materials.

(2) wear resistance

Wear resistance refers to the ability of the coating abrasion resistance. Although some piece of material hardness itself may not be too high, but add in the process of production of elements and processes can lead to cracks of edge from cutting or wear.

(3) surface lubricity

High friction coefficient increases the heat cutting and lack even the life of the coating. Reduced coefficient of friction can greatly extend the life of the tool. Standards of fine and smooth surface texture helps reduce heat, jumps quickly because you can slide the smooth surface of the surface of rake and reduced heat generation. Compared with uncoated tools, better surface lubricity coating tools also allow machining with high cutting speeds, to prevent high temperature welding material and workpiece.