Polycrystalline module and 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. This makes 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 drawing power. Thus the current of polycrystalline diamond die in metal wire drawing in the beginning gradually focused on occupation.
Compared with the hard alloy die, die using polycrystalline diamond drawing die has the following significant strengths:
1 good wear resistance, long life.
Polycrystalline diamond drawing die life is about of hard alloy die 30 ~ 50 times, so in the drawing process is not demand often stop replacement of the mould. Polycrystal drawing die aperture in the unit time change is very small, small change of the pull-out wire scale, which for the reel wire is very favorable. Generally drawn out of the wire coil number is fixed, if the size of the wire products will soon become larger, the number of winding circles relatively agile cut, which needs to constantly change the drum scale, is not conducive to the progress of production power.
2 high drawing power.
Drawing die in the use of in the process of the need to protect the drawing die with thelife and wire surface quality is very important to advocate general customers of polycrystalline diamond drawing die every 24 hours of protection. In 24 hours the aperture polycrystalline diamond drawing die with 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.
3 to reduce labor intensity.
Because of polycrystalline diamond drawing die number of long life, expanding, slow, don't need often replacement of the mould, unlike the cemented carbide drawing die must hour on wire scale changes, greatly reducing the labor intensity of workers, a worker in the production process to co-ordinate 4-5 drawing machine.
4 raw materials saving.
If drawing surface is plated with a metal wire, suspension of drawing process in electroplating process has not suspended, which resulted in is electroplating wire appearance of plating layer thickness overruns, re start drawing required thickness of overruns of wire cut, forming great spoiled and shutdown times more waste more. The polycrystalline diamond mode can greatly reduce the waste.
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