Low-lead free-cutting anti-corrosion tin-brass alloy material

A brass alloy, free-cutting technology, applied in the field of tin-brass alloy materials, can solve the problems of high copper content in silicon brass, poor acceptance, high cost, and achieve the effect of good cutting performance

Inactive Publication Date: 2015-03-11
HENGJI GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silicon brass with high copper content (greater than >70%) can meet the requirements of materials against dezincification, but silicon brass has high copper content, high cost and poor economy
The dezincification resistance and cutting performance of H62 and H59

Method used

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  • Low-lead free-cutting anti-corrosion tin-brass alloy material
  • Low-lead free-cutting anti-corrosion tin-brass alloy material

Examples

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Example Embodiment

[0026] The following describes the present invention in further detail with reference to the embodiments, but the present invention is not limited to the embodiments:

[0027] The alloy sample preparation scheme of the embodiment of the present invention is:

[0028] Ingredients → industrial frequency induction electric furnace smelting → full continuous casting 21.7~21.8mm round bar → drawing φ20.6mm → peeling → φ20.0mm

[0029] Among them, the silicon, arsenic, boron, and phosphorus used in the batching process are Cu-Si, Cu-As, Cu-B, and Cu-P. Master alloy. Cu-Si alloy, Si content is 20%, Cu-As arsenic content is 30%, Cu-P phosphorus content is 15%, and Cu-B boron content is 5%.

[0030] The comparative sample was also processed under the same process conditions.

[0031] The specific component content list of each embodiment and comparative example of the low-lead free-cutting corrosion-resistant brass alloy of the present invention 1:

[0032] Table 1 Copper alloy composition (WT%...

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Abstract

The invention discloses a low-lead free-cutting anti-corrosion tin-brass alloy material. The material includes the following components: 60.0 to 65.0 percent of Cu (copper), 0.5 to 1.5 percent of Sn (tin), 0.1 to 0.7 percent of Si (silicon), 0.02 to 0.12 percent of As (arsenic), 0.002 to 0.015 percent of B (boron), 0.01 to 0.25 percent of Pb (plumbum), 0.03 to 0.3 percent of Bi (bismuth), Sb (antimony) and P (phosphorus), as well as zinc and no more than 0.25 percent of impurities, wherein the Bi content is less than 0.10 percent, the Sb content is less than 0.10 percent, the P content ranges from 0.01 percent to 0.1 percent, the Fe (ferrum) content is less than 0.1 percent, the Ni (nickel) content is less than 0.1 percent, the Al (aluminum) content is less than 0.1 percent, the weight ratio of Si and Sn is 0.1-0.5 to 1, and the weight ratio of As and B is 5-60 to 1. The low-lead free-cutting anti-corrosion tin-brass alloy material has the advantages of high machinability, good cold/hot working property, mechanical property and welding property, as well as high dezincification resistance and stress corrosion resistance.

Description

Technical field: [0001] The present invention relates to a low-lead (Pb 0.01-0.25%) tin yellow which is easy to cut and has excellent corrosion resistance (the maximum resistance to dezincification is below 100um (micron)), good cutting performance, cold and hot processing performance, mechanical performance and welding performance. Copper alloy material. Background technique: [0002] Since 2014 in the United States, pipe fittings, valves and other objects in contact with drinking water need to implement the laws of California. That is, the lead content of metal materials in contact with drinking water shall not be higher than 0.25%. Developed countries such as Japan, Europe, and Canada have followed suit one after another. my country has also promulgated the standards for lead precipitation in water immersion tests for metal materials that are in contact with drinking water. Strict restrictions are imposed on the lead content in metal materials. At present, the lead-fre...

Claims

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Application Information

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IPC IPC(8): C22C9/04
CPCC22C9/04
Inventor 彭锋夏宝平段志华张忠建
Owner HENGJI GRP
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