Compared with the hard alloy, the tensile strength of polycrystalline diamond is only 70% of the common hard alloy, but the hardness is 2.5 times of that of the hard alloy. In this way, the polycrystalline diamond model has more advantages than the hard alloy die. Wear resistance of drawing die made of polycrystalline diamond, bore wear uniform, strong impact resistance, high efficiency of drawing. The polycrystalline diamond die in metal wire drawing industry began to gradually pay attention to.

Compared with the hard alloy mould, has the obvious advantages of using polycrystalline diamond drawing die die:

1 high efficiency of drawing. Drawing die in the use process the necessary maintenance of the drawing die service life and wire surface quality is very important, it is generally recommended to customers of polycrystalline diamond drawing die every 24 hours for maintenance. In 24 hours the aperture of polycrystalline diamond drawing die of small changes, drawn wire diameter change rate is very small. For the whole production process, the wire diameter of each drawing die is more stable, the ratio of input and output is large.

2 good wear resistance, long life. Polycrystalline diamond drawing die life is about of hard alloy die 30 ~ 50 times, so in the process of drawing need not often shut down and the replacement of the mold. Polycrystal drawing die aperture changes little in the unit time, drawn wire size change is small, which reel wire is very favorable. Generally, the number of wire coil is fixed, if the size of the wire is very large, the number of winding is relatively rapid, which needs to change the size of the drum, which is not conducive to the improvement of production efficiency.

3 raw materials saving. If the drawing surface is plated with a metal wire, stop drawing process in electroplating process did not stop. This leads to is electroplating wire surface plating thickness exceeded, to start drawing the excessive thickness of wire cut, causing great waste and downtime more waste will be. The use of polycrystalline diamond die can greatly reduce this waste.

4 reduce labor intensity. Polycrystalline diamond drawing die life due to the long, slow expansion, do not need regular replacement of mold, unlike the cemented carbide drawing die must always pay attention to the change of wire size, greatly reducing the labor intensity of workers, a worker in the production process can both 4-5 drawing machine.