CVD(Chemical Vapor Deposition)It not only has the smoothness and temperature resistance of single crystal diamond,but also has the advantages of wear resistance and low price of polycrystalline diamond.It has made great achievements in replacing rare natural diamond in the preparation of drawing die tools With good results,its extensive use will bring new vitality to the wire drawing die industry.

If the selected material to be processed is steel,no matter what die steel or cast iron is used,it is generally difficult to solve the problem of strain on the workpiece without any suitable surface treatment.

In the metal product industry,the pre-treatment coating of wire rods has been using an old process that has not changed for decades,and it is still mainly phosphating and boronizing.The coating material of the boronization process is borax,which is a toxic substance.The surface of the steel wire drawn by the boron coating process is easy to absorb moisture and rust,and it is difficult to meet the requirements of high-strength steel wire drawing.Phosphating is better than boron coating in drawing performance,but acid must be used to activate the wire surface in the phosphating process.In addition,there is no effective method for the treatment of residual phosphorus.Both of the above two coating processes will cause greater pollution to the environment.

1.The material of the wire drawing die core:Due to the constraints of the working conditions of wire drawing,the material of the wire drawing die core must not only have high hardness and wear resistance,but also have sufficient strength,toughness and a very smooth working surface.Taking into accoun

The following are commonly used methods to distinguish the quality of wire drawing die steel: 　　1.Fake and inferior steel is easy to fold; 　　2.The surface of fake and inferior steel often appears pitted; 　　3.The surface of fake and inferior steel is prone to cracks; 　　4.Fake and inferior steel is easy to scratch; 　　5.Fake and shoddy steel has no metallic luster;