Cerium-containing leadless free-cutting zinc-copper-nickel alloy material and preparation method thereof

Abstract

A cerium-containing leadless free-cutting zinc-copper-nickel alloy material comprises the chemical elements in percent by mass: 40-42% of Zn, 9-11% of Ni, 0.5-0.8% of Co, 0.15-0.18% of B, 0.05-0.08% of Mn, 0.03-0.05% of Ce, 0.05-0.08% of As, 0.08-0.1% of Hf, and the balance Cu. The zinc-copper-nickel alloy possesses the characteristics of excellent corrosion resistance and cold / hot processing formability originally owned by zinc-copper-nickel alloy; by adding B, Ce, Hf and other elements, the copper alloy is improved in cutting performance and electric conductivity, and the lead pollution problem is solved; and by reasonably controlling the processing temperature after casting and taking waste copper as a raw material, the hardness of the core part and the hardness of the surface are basically consistent, and the alloy quality is uniform. An employed refining agent is used for casting production, is capable of reducing the porosity degree of a casting by 1-2 degree and enabling the oxide inclusions to be around second grade, and helps to obviously improve the yield.

Description

technical field [0001] The invention relates to the field of manufacturing metal alloy materials, in particular to a cerium-containing lead-free free-cutting zinc white copper alloy material and a preparation method thereof. Background technique [0002] Copper is widely used because of its good electrical conductivity, plasticity and corrosion resistance. Adding elements such as aluminum, nickel, manganese, tin, silicon, and lead to copper alloy can improve the performance of copper and be used in different places. At present, there are still some problems in the existing copper alloys in my country, such as the alloy contains a large number of impurity elements, poor high temperature fatigue, low high temperature strength; low hardness, poor wear resistance, large friction coefficient, short service life; poor conductivity, waste of electric energy; bending The processing performance is poor and it is easy to break; the quality is heavy and the construction is difficult; i...

AI Technical Summary

Problems solved by technology

At present, there are still some problems in the existing copper alloys in my country, such as the alloy contains a large number of impurity elements, poor high temperature fatigue, low high temperature strength; low hardness, poor wear resistance, large friction coefficient, short service life; poor conductivity, waste of electric energy; bending Poor processing performance, easy to break; heavy quality, difficult construction; can not meet market requirements