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A kind of lead-free bismuth brass and its manufacturing process

A technology of lead-free bismuth brass and manufacturing process, which is applied in the field of copper alloys, can solve problems such as not showing dezincification corrosion, failure to meet customer requirements, dezincification corrosion, etc., to solve dezincification corrosion, reduce material costs, and be good The effect of machinability

Active Publication Date: 2017-03-08
江苏靖隆合金钢机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Part of the improved brass is used for valves, water pipes, faucets, etc. in drinking water systems, so the requirements for brass are particularly strict. Dezincification corrosion, and dezincification corrosion will occur under stress conditions, eventually leading to fracture and other consequences
[0005] Chinese Patent No. 201310562188.4 discloses the name "a kind of land money extruded brass rod and its production method". It replaces lead element with bismuth element and improves the cutting performance, but it still has dezincification corrosion and has not been well solved. Solved, unable to meet customer requirements

Method used

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  • A kind of lead-free bismuth brass and its manufacturing process
  • A kind of lead-free bismuth brass and its manufacturing process

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Embodiment Construction

[0026] The technical solution of the present invention is not limited to the specific embodiments listed below, but also includes any combination of the specific embodiments.

[0027] The specific parameters in each embodiment refer to Table 1-Table 3, Table 1 is the relevant data of Embodiment 1 to Embodiment 5 of the present invention, Table 2 is the relevant data of Embodiment 6 of the present invention and Embodiment 10, and Table 3 is the present invention Invention Example 11 Paper Example 15 related data.

[0028] Table 1 is the relevant data of Embodiment 1 to Embodiment 5 of the present invention.

[0029] Composition and parameter names Example 1 Example 2 Example 3 Example 4 Example 5 Cu(wt%) 57.5 57.6 57.7 57.8 57.9 Bi (wt%) 1.70 1.72 1.74 1.76 1.78 Se(wt%) 0.040 0.042 0.044 0.046 0.048 Mn(wt%) 1.00 1.10 1.15 1.20 1.25 Al(wt%) 0.30 0.32 0.34 0.36 0.38 RE (wt%) 0.050 0.052 0.054 0.056 0.0...

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Abstract

The invention discloses lead-free bismuth brass, including the following components by weight: 57.5-59.0wt% of copper, 1.7-2.0wt% of bismuth, 0.05-0.09wt% of rare earth element RE, 0.04-0.07wt% of selenium, 1.0-2.0wt% of manganese, 0.3-0.8wt% of aluminum, inevitable impurities with the total weight of not more than 0.05wt%, and balance of zinc. The use rate of the copper in a prepared copper rod can be reduced by adding of the manganese, the cost of the raw materials is greatly saved; through a variety of metal elements, dezincification corrosion problem of the copper rod can be well solved, when in use, the copper rod has good machinability.

Description

technical field [0001] The invention relates to a copper alloy, in particular to a lead-free bismuth brass. Background technique [0002] Lead brass has excellent mechanical and physical properties, good casting performance and cutting performance, and low price, so it is widely used in instruments and meters, electronics, electrical appliances, daily hardware, drinking water systems, etc. [0003] However, lead and its compounds are one of the 17 chemical substances that seriously endanger human life and the natural environment. The lead in the alloy is easily invaded or detached from the matrix during use, and the lead in industrial waste gas seeps into the groundwater system. Various forms of lead enter the animal or human food chain through various channels, endangering human health and affecting the environment. Therefore, replacing lead with lead-free and low-harm substances is the main way to reduce lead pollution. That is, by improving the composition of brass and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/02
CPCC22C1/02C22C9/04
Inventor 史立明
Owner 江苏靖隆合金钢机械制造有限公司