Lead-free easy-cutting high-strength corrosion-resistant silicon-brass alloy and the preparation method and use thereof

Patent metadata

Field	Value
Publication number	US-10697045-B2
Application number	US-201615573774-A
Country	US
Kind code	B2
Filing date	Dec 15, 2016
Priority date	Oct 27, 2015
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

The present invention relates to a lead-free easy-cutting high-strength corrosion-resistant silicon-brass alloy and the preparation method and use thereof. The mass percent composition of the alloy is: 56˜60% Cu, 38˜42% Zn, 0.003˜0.01% B, 0.03˜0.06% Ti, and 1.0˜1.5% Si and 0.5˜0.9% Al or 0.5˜0.8% Si and 1˜1.5% Al, and the zinc equivalent of all components is between 48% and 50%. In the present invention, the phase composition and the distribution state of the alloy can be regulated by controlling the contents of Si and Al elements, as well as by adding a B and Ti composite grain refiner, in order to obtain a copper alloy with the advantages of excellent comprehensive performance of strength, process ability and dezincification resistance, a high production yield, and low costs, which can replace lead brass and bismuth brass for plumbing, bathroom and a variety of corrosion-resistant parts, and has a bright prospect of popularization and application.

First claim

What is claimed is:

1. A lead-free easy-cutting high-strength corrosion-resistant silicon-brass alloy, the silicon-brass alloy consisting of components in following percentages:
56˜60 wt % Cu, 1.0˜1.5% wt % Si, 0.5˜0.9% wt % Al, 38%-42% wt % Zn, 0.003˜0.01% wt % B, 0.03˜0.06% wt % Ti, and unavoidable trace impurities;
wherein a zinc equivalent of the silicon-brass alloy for all the components is between 48% and 50%; and
wherein a structure of the silicon-brass alloy comprises component phase β and component phase γ, where the component phase β is a matrix of grains with a grain size of 200 μm-400 μm and the component phase γ phase is fine spherical gains uniformly and dispersedly distributed in the grains of the component phase β.

2. A lead-free easy-cutting high-strength corrosion-resistant silicon-brass alloy, the silicon-brass alloy consisting of components in following percentages:
56˜60 wt % Cu, 0.5˜0.8% wt % Si, 1˜1.5%% wt % Al, 38%-42% wt % Zn, 0.003˜0.01% wt % B, 0.03˜0.06% wt % Ti, and unavoidable trace impurities;
wherein a zinc equivalent of the silicon-brass alloy for all the components is between 48% and 50%; and
wherein a structure of the silicon-brass alloy comprises component phase β and component phase γ, where the component phase β is a matrix of grains with a grain size of 200 μm-400 μm and the component phase γ phase is fine spherical gains uniformly and dispersedly distributed in the grains of the component phase β.

Assignees

• Univ South China Tech
• Kaiping Freendo Sanitary Ware Co Ltd

Inventors

• Yang Chao
• Ding Zhi
• Ding Yanfei
• Feng Songzhan

Classifications

• C22C1/02

  by melting {(C22C1/1036 takes precedence)} · CPC title

• C22C1/03

  using master alloys · CPC title

• C22C9/04 Primary

  with zinc as the next major constituent · CPC title