Mg-containing high-strength deforming zinc-copper alloy and preparation method thereof

Abstract

The invention relates to an Mg-containing high-strength deforming zinc-copper alloy. The alloy consists of the following components in percentage by mass: 0.1 to 5.0 percent of copper, 0.05 to 3.0 percent of magnesium and the balance of zinc and less than or equal to 0.05 percent of impurities. The alloy can also comprise the following components in percentage by mass: at least one of aluminum and titanium, wherein the aluminum accounts for 0.1 to 2.5 percent and the titanium accounts for 0.02 to 0.3 percent. The method for preparing the Mg-containing high-strength deforming zinc-copper alloy comprises the following steps of: smelting by adopting covering protection method, and adding alloy elements in forms of pure zinc, pure aluminum and intermediate alloys of Zn-Cu, Cu-Mg and Zn-Ti, wherein the smelting temperature is between 620 and 710 DEG C; casting at the temperature of between 450 and 500 DEG C, homogenizing ingots at the temperature of between 360 and 380 DEG C for 6 to 10 hours, and performing extrusion molding at the temperature of between 240 and 310 DEG C, wherein the extrusion ratio is between 10 and 20; and annealing at the temperature of between 170 and 210 DEG C for 2 to 4 hours. The Mg-containing high-strength deforming zinc-copper alloy has the advantages of high strength and comprehensive performance, good flowing property of alloy liquid and good casting performance, and can be used as a structural material.

Description

technical field

[0001] The invention relates to a zinc-copper alloy and a preparation method thereof, in particular to a Mg-containing high-strength deformed zinc-copper alloy and a preparation method thereof, belonging to the technical field of manufacturing metal alloy materials. Background technique

[0002] Low strength is one of the main bottlenecks that limit the popularization and application of wrought zinc alloys as structural components. In order to improve the strength of zinc alloy, some foreign researchers have carried out some research on the deformation mechanism, alloying and process conditions of zinc alloy. Deformed zinc alloy until the 1960s, due to the progress of smelting and processing technology, the research work on improving the physical and mechanical properties of zinc alloy has been accelerated, especially the mastery of high-strength variable zinc alloy smelting technology and processing technology has broken the Zinc alloys cannot be used as st...