Zinc alloy for die

Abstract

The invention provides a zinc alloy for a die. The zinc alloy for the die comprises the following components in percentage by mass: 5 percent to 22 percent of aluminium, 0.01 percent to 0.03 percent of magnesium, 1 percent to 10 percent of copper, 0.05 percent to 0.5 percent of rare earth, 0.01 percent to 0.05 percent of boron, 0.05 percent to 0.1 percent of zirconium, 0.03 percent to 0.1 percent of bismuth and the balance of zinc. According to the zinc alloy for the die, which is provided by the invention, not only can the hardness and the wear resistance be further improved, but also the phenomena of composition segregation and bottom shrinkage are obviously reduced; and on the premise of ensuring the tensile strength basically constant, the size stability and the die making accuracy of the zinc alloy are obviously improved.

Description

technical field [0001] The invention belongs to the field of mold manufacturing, in particular to a zinc alloy for molds. Background technique [0002] With the development of science and technology, the scope of mold application is becoming more and more extensive. For the manufacture of product molds with multiple varieties, small batches or frequent updates and modifications, such as injection molds, blow molds, and compression molds, it is required to have manufacturing It has the characteristics of short cycle, low production difficulty and low cost, while the steel mold usually used in the prior art has high manufacturing cost and long cycle, and the cost of zinc-based alloy material is relatively low, so it is widely used in the field of manufacturing such molds . However, pure metal zinc cannot meet the requirements such as plasticity, hardness, strength, etc., so alloying elements are usually added to improve its physical and mechanical properties. For example, Zo...

AI Technical Summary

Problems solved by technology

[0007] The invention solves the technical problems in the prior art that zinc alloys for molds have poor hardness and wear resistance, the Brinell hardness is less than 110, and the size of the alloy is unstable, resulting in low mold making precision.