On the one hand, it depends on wire drawing die tool own quality, on the other hand, it depends on the drawing conditions.

The impact of reduction rate

During the drawing process, the wire drawing mold exerts a pressure on the wire, and the wire also generates a back pressure against the wire wall when deformed. 

The greater the reduction rate used in drawing, the stronger the pressure exerted on the metal wire by the hole wall, and the reaction force generated by the metal wire

on the hole wall is also enhanced. If the force is greater than the tensile strength of the mold itself, The wire die will crack.

The impact of lubricants

During the drawing process, the quality of the lubricant and the sufficient supply of lubricant affect the service life of the wire drawing die. The lubricant has lubrication, 

cooling, cleaning and rust prevention during the wire drawing process.

Influence of surface quality of metal blanks

If there is an oxide layer, sand or other impurities on the surface of the metal blank, 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 wire die hole to wear and scratch the surface quickly like the 

abrasive. Therefore, it must be acid washed before stretching; when stacking blanks, pay attention to the cleanliness of the stacking site and avoid contact with sand and 

other impurities.