Long-durability die casting machine punch

Abstract

The invention relates to a long-durability die casting machine punch. The punch comprises the following components in part by weight: 100 parts of copper, 4.0 to 6.0 parts of chromium, 0.1 to 1.5 parts of manganese, 1.0 to 2.5 parts of molybdenum, 0.3 to 0.5 part of carbon, and 0.5 to 2.0 parts of silicon. Compared with the prior art, the long-durability die casting machine punch has the advantages of high wear resistance, long service life and the like.

Description

technical field [0001] The invention relates to a die-casting machine, in particular to a die-casting machine punch with long durability. Background technique [0002] During the die-casting process, the punch pressurizes the molten aluminum alloy in the barrel and sends it into the mold to form the shape of the finished product, and then the punch removes the barrel, so that the reciprocating stamping slides out, due to thousands of times or even several Ten thousand times of sliding and pressure will cause the punch to be easily worn and have poor durability. [0003] The most important factor that determines the service life of the punch is the wear resistance of the punch. The punch pushes the aluminum liquid forward in the barrel at high speed, and the punch produces severe friction with the barrel under the high speed and high pressure of the oil cylinder. In addition, the high-temperature aluminum liquid bites with it, resulting in axial strain and failure. In addit...

AI Technical Summary

Problems solved by technology

The punch is subjected to repeated impact pressure, high temperature and periodic rapid cooling and rapid heating, and the thermal fatigue crack expands to the inside, resulting in final failure