Natural diamond wire drawing die
The diamond die blank has the characteristics of natural diamond, and the diamond surface is perfectly regular, in good working condition, and has strong wear resistance. Its scope of application is equivalent to natural diamonds with a diameter of less than 0.5mm, and the price of raw materials is much higher than that of natural diamonds.
Effect of Conditions on polycrystalline wire drawing die life   
on the one hand depends on the quality itself, on the other hand also depends on stretching conditions
(a) Effect of reduction rate  
in the drawing process, wire drawing die pressure on the metal wire, And the metal wire also produces a back pressure on the wire drawing die wall when it is deformed. The greater the reduction rate used in stretching, the stronger the pressure of the hole wall on the metal wire, and the reaction force generated by the metal wire to the hole wall is also increased. If this force is greater than the tensile capacity of the mold itself, then The wire die will crack.
(2) Influence of lubricant  
During the drawing process, the quality of lubricant and whether the supply of lubricant is sufficient will affect the service life of the wire drawing die. Lubricant has lubricating, cooling, cleaning and anti-rust functions in the process of wire drawing.
(3) Influence of the surface quality of the   
metal billet If there is oxide layer, sand or other impurities on the surface of the metal billet, it will adversely affect the service life of the wire drawing die. Because the oxide layer on the metal surface is hard and brittle, when the metal blank passes through the die hole, it will cause the die hole of the wire drawing die to wear quickly and scratch the surface like abrasives. Therefore, before stretching, it must be thoroughly acid washed; when the billets are stacked, pay attention to the cleanliness of the stacking site and avoid contact with sand and other impurities.