国产精品国产三级国产aⅴ无密码Iwww.日日日.comI91亚洲影院I99福利片I国产三级午夜理伦三级I91漂亮少妇露脸在线播放Iwww.色午夜,comI九九热久久久

The product has the tensile strength and toughness of steel, the conductivity and high frequency characteristics of copper, and has the advantages of saving copper material and reducing cost. The copper-clad steel wire with diameter of 0.09-1.60mm and conductivity of 15% - 40% produced by our factory can also be produced according to the requirements of customers, with complete testing equipment to ensure the quality

The yield strength σ s and the deformation resistance scale may be small, so that the unit deformation force can be reduced correspondingly, so as to prolong the die life. The cold deformation property of steel is better, that is to say, the material should have better plasticity and lower hardness, which can prevent the product from cracking in a larger deformation degree. The work hardening sensitivity of steel should be as low as possible, so as not to cause too much deformation force in the process of cold heading deformation.

Drawing die series include "natural diamond drawing die", "imported polycrystalline drawing die", "domestic high crystal drawing die", "domestic polycrystalline drawing die" and "hard alloy drawing die". Our company's mould material selection is excellent, the drawing die core adopts the products of famous manufacturers; the process is exquisite, and the products have the characteristics of strong wear resistance and high finish. It is mainly used for drawing copper wire, copper clad steel wire, iron wire, stainless steel wire, aluminum magnesium alloy wire, etc.