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An environmentally friendly, easy-cutting, thermal-cracking, selenium-bismuth brass material and its preparation process

A preparation process and easy-cutting technology, which is applied in the field of metal alloy materials, can solve the problems of material overall performance decline, low melting point of Sn, and easy segregation, etc., and achieve the effects of reducing raw material costs, improving cutting performance, and avoiding burnout

Active Publication Date: 2017-08-25
四川中蓝基业新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low melting point of Sn, when its content is too high, it is easy to segregate and reduce the overall performance of the material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The chemical composition of an environment-friendly, easy-cutting and thermal-cracking-resistant selenium-bismuth brass alloy material is Cu: 59.39, Bi: 2.0, Sn: 0.110, Se: 0.20, and the balance is zinc.

[0035] Its preparation process is as follows:

[0036] (1) Put 116.6kg of cathode copper into the melting furnace, under the protection of flake graphite powder as a covering agent, heat up to 1200°C, after the electrolytic copper is completely melted, add 1kg of selenium-copper intermediate alloy, keep it warm for 10min, and then add 0.25kg of high-purity tin And 4kg of high-purity bismuth, after the tin and bismuth are completely melted, use electromagnetic stirring to stir the molten pool.

[0037] At the same time, adjust the temperature to 1060-1080°C, add 76kg of electrolytic zinc, heat up and remove slag, add 0.4kg of phosphor-bronze master alloy after 10 minutes, adjust the temperature to 1050°C, and carry out water-cooled continuous casting.

[0038] The che...

Embodiment 2

[0045] The chemical composition of an environment-friendly, easy-cutting and thermal-cracking-resistant selenium-bismuth brass alloy material is Cu: 59.58, Bi: 1.95, Sn: 0.114, Se: 0.34, and the balance is zinc.

[0046] Its preparation process is as follows:

[0047] (1) Add 116.5 kg of cathode copper into the melting furnace, and under the protection of flake graphite powder as a covering agent, heat up to 1150 °C. After the electrolytic copper is completely melted, add 1.7 kg of selenium-copper intermediate alloy, keep it for 13 minutes, and then add high-purity tin 0.25 kg and 4kg of high-purity bismuth. After the tin and bismuth are completely melted, electromagnetic stirring is used to stir the molten pool.

[0048] At the same time, adjust the temperature to 1070°C, add 77kg of electrolytic zinc, heat up and remove slag, add 0.4kg of phosphor-bronze master alloy after 12 minutes, adjust the temperature to 1030°C, and carry out water-cooled continuous casting.

[0049] ...

Embodiment 3

[0056] The chemical composition of an environment-friendly, easy-cutting and thermal-cracking-resistant selenium-bismuth brass alloy material is Cu: 60.18, Bi: 1.93, Sn: 0.117, Se: 0.59, and the balance is zinc.

[0057] Its preparation process is as follows:

[0058] (1) Add 117.3kg of cathode copper into the melting furnace, under the protection of flake graphite powder as a covering agent, heat up to 1150°C, after the electrolytic copper is completely melted, add 3kg of selenium-copper intermediate alloy, keep it warm for 15min, and then add 0.25kg of high-purity tin And 4kg of high-purity bismuth, after the tin and bismuth are completely melted, use electromagnetic stirring to stir the molten pool.

[0059] At the same time, adjust the temperature to 1070°C, add 76kg of electrolytic zinc, heat up and remove slag, add 0.4kg of phosphor-bronze master alloy after 15 minutes, adjust the temperature to 1040°C, and carry out water-cooled continuous casting.

[0060] The chemica...

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Abstract

The invention discloses an environment-friendly, easy-to-cut, heat-cracking-resistant selenium-bismuth brass material and a preparation process thereof, which are characterized in that the chemical composition of the selenium-bismuth brass alloy material is Cu 58-61, Bi 1.6-2.2, and Bi 1.6-2.2 in weight percentage. Sn 0.1 ~ 0.15, Se 0.1 ~ 0.65, the balance is zinc and unavoidable impurities. Alloy materials of required specifications are prepared by material preparation, batching, smelting, ingot casting and hot and cold processing. Its tensile strength is σb 360-550MPa, hardness HRB 65-75, elongation δ13-30%, excellent high-temperature thermal cracking performance, and can replace lead brass for hot stamping and cutting to make various structural parts.

Description

technical field [0001] The invention relates to an environment-friendly, easy-to-cut, heat-cracking-resistant selenium-bismuth brass material and a preparation process thereof, belonging to the technical field of metal alloy materials. Background technique [0002] Lead brass has good cutting performance and good cold and hot processing performance, and is widely used in the fields of plumbing and sanitary ware, electronic appliances, clocks and instruments. However, lead in brass is easy to dissolve, which is harmful to human body and environment. [0003] At present, there is no brass in China that can fully replace lead brass, and the field of replacing lead brass is very limited. Bismuth and lead are adjacent in the periodic table of elements, and their physical and chemical properties have many similarities. At present, the research on lead-free brass with bismuth instead of lead is the most. Throughout the various studies on bismuth brass by experts and scholars at h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/04C22C1/03
Inventor 侯龙超侯仁义吕忠华
Owner 四川中蓝基业新材料科技有限公司
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