Free-cutting anticorrosive brass alloy and its prepn process

A brass alloy, easy-cutting technology, applied in the fields of electronic and telecommunication connectors, switch connectors, valve parts, civil water supply system pipe castings, lead-free low-boron bismuth brass alloys, can solve the problem of high market prices, and achieve Effect of improving dezincification corrosion resistance, low manufacturing cost, and good welding performance

Active Publication Date: 2007-08-22
NINGBO POWERWAY ALLOY MATERIAL
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  • Summary
  • Abstract
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Problems solved by technology

Its cutting performance is only 75-

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  • Free-cutting anticorrosive brass alloy and its prepn process
  • Free-cutting anticorrosive brass alloy and its prepn process

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Example Embodiment

[0021] The invention will be further described in detail below in conjunction with specific embodiments:

[0022] The production process of the brass alloy in the embodiment of the present invention is as follows:

[0023] Raw material preparation and batching-alloying treatment smelting-continuous ingot casting-ingot heating-extrusion-stretching-heat treatment-pickling-stretching-straightening and polishing-stress relief annealing- —Inspect the packaging of finished products.

[0024] The details can be expressed as follows: the low-boron bismuth brass alloy is smelted by alloying treatment and covering protection method, so that the metal bismuth and boron are quickly solid-dissolved in the brass melt into intermetallic compounds, and continuously cast into brass at 1020℃ For ingot casting, high extrusion ratio extrusion is performed at a temperature of 680-770°C, the intermediate heat treatment is annealed at a temperature of 430-700°C according to cold working conditions, and ...

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Abstract

The present invention discloses one kind of free-cutting anticorrosive brass alloy and its preparation process. Chemically, the brass alloy consists of Cu 57-64 wt%, Bi 0.6-2.5 wt%, B 0.0003-0.025 wt%, Mn 0.01-0.2 wt%, Sb 0.002-0.02 wt% and Zn and inevitable impurities for the rest. The inevitable impurities has content within 0.3 wt%, and includes Pb within 0.1 wt% and Cd within 0.001 wt%; and the alloy contains Cu+Zn over 97 wt%. The brass alloy has high anticorrosive performance, excellent cutting performance and good welding performance.

Description

technical field [0001] The invention relates to a lead-free brass alloy, in particular to a lead-free low-boron-bismuth brass alloy which is easier to cut and has excellent resistance to dezincification corrosion. It is especially suitable for electronic and telecommunications connectors, civil water supply system pipe castings, valves, switch connectors; household appliances; optoelectronic components for lamps and photographic equipment; children's toys and parts manufacturing in machinery and automobile manufacturing industries. It is a metal material that is beneficial to human health and environmentally friendly, and it is also a substitute for lead brass, which is widely used at present and can cause adverse effects on the human body and the environment. Background technique [0002] Leaded brass has excellent cold and hot processing performance, excellent cutting performance and self-lubricating characteristics, which can meet the machining of various shapes of parts,...

Claims

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Application Information

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IPC IPC(8): C22C9/04
Inventor 张明蔡洎华谢潇裴勇军
Owner NINGBO POWERWAY ALLOY MATERIAL
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