Zinc alloy for pressure casting and preparing method and application of zinc alloy

Abstract

The invention discloses a zinc alloy for pressure casting and a preparing method and application of the zinc alloy. The zinc alloy is prepared from, by mass, 4.15%-4.35% of iron, 11.1%-11.5% of zinc, 9.23%-9.45% of copper, 1.05%-1.20% of molybdenum, 0.36%-0.42% of selenium, 0.36%-0.39% of indium, 1.23%-1.28% of gallium and the balance aluminum. The zinc alloy for pressure casting is prepared through vacuum melting, refining, pressure casting, heat treatment, aging and the like. As all the ingredients and all the contents are reasonably set, it is guaranteed that the zinc alloy has the enough mechanical performance, and particularly has the mechanical performance suitable for the heavy-load and high-temperature use environment; and meanwhile the technological parameters of pressure casting and the pressure parameters of inert gas during refining are optimally selected, and the mechanical performance of the alloy is improved. The zinc alloy has the excellent normal-temperature mechanical performance, use requirements can be still met even under the condition that the temperature is higher than150 DEG C, and the zinc alloy is suitable for manufacturing pressure castings under the high-temperature and heavy-load working condition.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a zinc alloy for die-casting and its preparation method and application. Background technique [0002] Die-casting is a kind of pressure-casting part. It uses a pressure-casting mechanical die-casting machine with a casting mold installed, and pours metals such as copper, zinc, aluminum or zinc alloy heated into a liquid state into the feed port of the die-casting machine, and passes through the die-casting machine. Die casting, casting copper, zinc, aluminum parts or zinc alloy parts of the shape and size limited by the mold, such parts are usually called die castings. Die-casting parts have different names in different places, such as die-casting parts, pressure castings, die-casting parts, die-casting aluminum, die-casting zinc parts, die-casting copper parts, copper die-casting parts, zinc die-casting parts, aluminum die-casting parts aluminum die-casting parts, aluminum die-ca...

AI Technical Summary

Problems solved by technology

[0003] Existing zinc alloy materials for die casting usually include aluminum, iron, copper, zinc and other components. Due to the different content of each element in the alloy, the spatial distribution of each element in the alloy is quite different, resulting in different comprehensive properties of each alloy, especially the mechanical properties. Big difference in performance

The casting process is prone to defects such as porosity and segregation, and its service temperature is also low. Often due to the large amount of heat generated by friction and wear under heavy load conditions, the temperature of the parts is overheated and it is difficult to use