Bismuth brass alloy material and preparation process and hot stamping process thereof

A technology of alloy material and preparation process, which is applied in the field of bismuth brass alloy material and its preparation process and hot stamping process, can solve the problems of endangering human health, organ damage, environmental pollution, etc., and achieve reduced production costs, qualified quality, and preparation The effect of simple method

Inactive Publication Date: 2013-03-06
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Leaded brass, which is widely used in the market at present, will cause environmental pollution during production and use, endanger human health, and cause great damage to human hematopoiesis, nervous system, especially children's kidneys and other organs. The sale of brass drinking water valves or fittings containing lead is strictly prohibited by law

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Composition of bismuth brass alloy material

[0029] The composition of the bismuth brass alloy material is: in terms of mass percentage, zinc accounts for 39.0%, bismuth accounts for 0.7%, titanium accounts for 0.45%, selenium accounts for 0.06%, and the balance is Cu.

[0030] (2) Preparation and mechanical property test of bismuth brass alloy material

[0031] Batching is carried out according to the bismuth brass alloy material components. After the batching is completed, it is smelted in an intermediate frequency induction furnace. Before smelting, copper and zinc are added. After the zinc is melted, graphite covering agent is added. After the copper is melted, bismuth, titanium and selenium are added in sequence; Raise the temperature to 1020°C and cast into cast rods.

[0032] Test the mechanical properties of cast rods: tensile strength Rm=285MPa, elongation A=17.0%, reduction of area Z=20.0%, Brinell hardness HBW=98.5, and its mechanical properties are sim...

Embodiment 2

[0036] (1) Composition of bismuth brass alloy material

[0037] The composition of the bismuth brass alloy material is as follows: by mass percentage, zinc accounts for 41.0%, bismuth accounts for 1.0%, titanium accounts for 0.70%, selenium accounts for 0.05%, and the balance is Cu.

[0038] (2) Preparation and mechanical property test of bismuth brass alloy material

[0039] The batching was carried out according to the components of the bismuth brass alloy material. After the batching was completed, an intermediate frequency induction furnace was used for melting. The melting process was the same as in Example 1, and the casting temperature was 1000°C.

[0040] Test the mechanical properties of cast rods: tensile strength Rm=305MPa, elongation A=15.5%, reduction of area Z=15.0%, Brinell hardness HBW=100.3, and its mechanical properties are similar to those of lead brass ZCuZn40Pb2 (tensile strength Rm=295MPa, elongation A=11.5%, reduction of area Z=16.1%) have similar mecha...

Embodiment 3

[0044] (1) Composition of bismuth brass alloy material

[0045] The composition of the bismuth brass alloy material is as follows: by mass percentage, zinc accounts for 35.0%, bismuth accounts for 0.4%, titanium accounts for 0.3%, selenium accounts for 0.05%, and the balance is Cu.

[0046] (2) Preparation and mechanical property test of bismuth brass alloy material

[0047] The batching was carried out according to the components of the bismuth brass alloy material. After the batching was completed, an intermediate frequency induction furnace was used for melting. The melting process was the same as in Example 1, and the casting temperature was 980°C.

[0048] Test the mechanical properties of cast rods: tensile strength Rm=270MPa, elongation A=19.5%, reduction of area Z=22.5%, Brinell hardness HBW=95.5, and its mechanical properties are similar to those of lead brass ZCuZn40Pb2 (tensile strength Rm=295MPa, elongation A=11.5%, reduction of area Z=16.1%) have similar mechanic...

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Abstract

The invention discloses a bismuth brass alloy material, which comprises the following components by mass percent: 35.0-45.0% of zinc, 0.4-1.5% of bismuth, 0.3-0.9% of titanium, 0.05-0.5% of selenium and the balance of copper. The invention also discloses a preparation process and a hot stamping process of the bismuth brass alloy material. According to the invention, the bismuth brass alloy material contains fewer metal elements, and the preparation method is simple; the prepared bismuth brass alloy has good mechanical property, cutting property and hot processing property; and the hot stamping process is adopted to directly stamp castings into pipe joints in various models, so that the compactness of the pipe joints can be improved, the process can be simplified, the production efficiency is improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to a bismuth brass alloy material and its preparation process and hot stamping process. Background technique [0002] Leaded brass, which is widely used in the market at present, will cause environmental pollution during production and use, endanger human health, and cause great damage to human hematopoiesis, nervous system, especially children's kidneys and other organs. The sale of lead-containing drinking water brass valves or fittings is strictly prohibited by law. Based on this, it is necessary to carry out research on lead-free brass, and develop a kind of free-cutting brass with moderate mechanical properties, excellent cutting performance and thermal processing performance, and low cost, which uses bismuth instead of lead, which will have broad market application prospects. Contents of the invention [0003] The purpose of the present invention is to provide a free-cutting bismuth brass alloy material with moderate mech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22C1/02B21J1/06B21J5/02C22F1/08
Inventor 周军陈勇蒋明忠王贵利张忠伦
Owner NUCLEAR POWER INSTITUTE OF CHINA
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