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What is the effect of stretching speed on tungsten-molybdenum wire drawing dies? Under certain other conditions, the average deformation speed increases with the increase of the stretching speed, the deformation heat effect increases, and the deformation temperature of the metal increases remarkably. More wire drawing dies in wococarbide. This phenomenon is particularly noticeable when using large deformation levels and high speed stretching. If the temperature is too high, the lubricant will easily fail and the lubrication conditions will deteriorate. At low speed stretching, the effect of reducing the deformation resistance of the metal is not obvious due to the small deformation heat effect, so the friction is large and the mold wear is severe.

What is the effect when applying back-pull on wire drawing die? During the stretching process, a certain back tension is applied to the wire, which reduces the radial compressive stress at the entrance of the mold, reduces the frictional stress, eliminates the annular groove at the entrance of the mold, and reduces the average wear of the mold. More information in wococarbide. At the same time, the reasonable reverse tension makes the stretching axis coincide with the center line of the die hole, eliminating the vibration and runout of the wire, and causing the asymmetric uneven wear of the mold. cut back. However, the excessive pulling force will reduce the tensile strength of the wire after stretching, causing shrinkage or broken wire.