Low-lead brass alloy and preparation method thereof

A lead brass and alloy technology, applied in the field of chemical materials, can solve the problems of affecting product red punching performance and welding performance, poor comprehensive performance and universal applicability, and difficulty in large-scale production and use, and achieve excellent anti-dezincification corrosion performance and Effects of stress corrosion resistance, improved dezincification resistance, and good forging performance

Inactive Publication Date: 2014-10-08
NINGBO IDC INT TRADE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the early research and development work of the applicant of the present invention, a low-lead brass alloy material with excellent performance was invented, which improved the performance of the low-lead brass alloy in many ways, but components such as Bi and Se were used, and the manufacturing cost was relatively high. High, not easy to be used in large-scale production; at the same time, due to the use of Bi and other materials, the red punching performance and welding performance of the product are affected, and the comprehensive performance and universal applicability of the product are poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The present invention will be further described below in conjunction with specific examples.

[0026] The preparation process of the low-lead brass alloy of the present invention is: raw material preparation-alloying treatment and covering protection smelting-continuous ingot casting-extrusion-heat treatment-stretching-annealing for stress relief-subsequent deep processing.

[0027] Concrete preparation method is as follows:

[0028] In the medium-frequency cored induction furnace, copper ingots and covering agent cryolite are added first, and lead-free arsenic-containing copper-zinc alloy brass is melted by alloying treatment and covering protection method. In the copper melt, the materials are fed according to a certain composition ratio. Make As, Ni and other components quickly solid-solve in the brass melt to form intermediate compounds, and make them evenly distributed in the grain and grain boundary, and continuously cast into ingots at 1040 ° C, at 680 ~ 760 ° C ...

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Abstract

The invention discloses a low-lead brass alloy. The low-lead brass alloy comprises 61.5-63.5% of copper and 0.02-0.15% of arsenic and also comprises less than or equal to 0.3% of nickel, less than or equal to 0.1% of aluminum, less than or equal to 0.2% of lead, less than or equal to 0.1% of manganese, iron and tin and the balance Fe and unavoidable impurities, wherein the content of the unavoidable impurities is less than or equal to 0.2%. The low-lead brass alloy reduces an alloy manufacturing cost, improves cutting ability and improves dezincification resistance.

Description

technical field [0001] The invention relates to an alloy, in particular to a low-lead brass alloy, and belongs to the field of chemical materials. Background technique [0002] Brass has good mechanical properties, good corrosion resistance and low application cost, and has a wide range of applications. In order to improve the machinability and forging performance of brass, lead has been added to brass for a long time to form leaded brass. Common lead brass, such as the current copper alloy pipe fittings for water supply, is generally cast or forged with C84400 and C83600 copper alloys. However, the lead content of C84400 copper alloy is 7%, and the lead content of C83600 is also up to 5%. When the pipe fittings made of lead brass are used in the water supply system, the lead in the pipe fittings will dissolve in the water. According to scientific determination, the lead content in the water can reach more than 50PPM. As a harmful element, lead has caused great pollution t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04
Inventor 潘勇
Owner NINGBO IDC INT TRADE
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