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Lead-free silicon brass alloy and preparation method

A silicon brass and alloy technology, which is applied in the fields of environment-friendly green metal materials, lead-free silicon brass alloys and preparation, can solve the problems of difficulty in obtaining widespread promotion and application, high cost, and achieve excellent cold and hot processing performance, Effects of improved cold and hot workability and improved corrosion resistance

Inactive Publication Date: 2014-04-16
沈阳亚欧星海铜业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw material cost of lead-free bismuth brass is much higher than that of lead brass, so it can only be demanded in the lead brass market with high environmental protection requirements, making it difficult to obtain wide promotion and application

Method used

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  • Lead-free silicon brass alloy and preparation method
  • Lead-free silicon brass alloy and preparation method
  • Lead-free silicon brass alloy and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] According to the alloy composition mentioned in Table 1, the copper-silicon-zinc alloy is smelted first, and the smelting temperature is 1150°C. After it is completely melted, the intermediate alloy of iron and aluminum is added and stirred evenly. Add manganese, boron, tin, phosphorus, and rare earth elements to the master alloy, wherein: tin, phosphorus, and rare earth elements are added in the form of zinc master alloys, and aluminum, iron, boron, and manganese are added in copper master alloys. , the mass fraction of copper or zinc is 80-90%. Stirring and slag removal, after spraying fire, gravity casting is adopted, the casting temperature is 1100°C, and the casting speed is 1mm / s to prepare alloy ingots.

[0037] When smelting, charcoal acts as a covering agent.

[0038] Table 1 The composition of lead-free silicon brass alloy of the present invention (wt%)

[0039]

[0040] In this embodiment, the rare earth element RE is lanthanum element.

[0041] The lea...

Embodiment 2

[0043] According to the alloy composition mentioned in Table 2, the copper-silicon-zinc alloy is smelted first, and the smelting temperature is 1200°C. After it is completely melted, the intermediate alloy of iron and aluminum is added and stirred evenly. The master alloy of manganese, boron, tin, phosphorus and rare earth elements is added, wherein: tin, phosphorus and rare earth elements are added in the form of zinc master alloy, and iron, aluminum, boron and manganese are added in the form of copper master alloy. , the mass fraction of copper or zinc is 80-90%. Stirring and slag removal, after spraying fire, gravity casting is adopted, the casting temperature is 1080°C, and the casting speed is 1.2mm / s to prepare alloy ingots.

[0044] When smelting, charcoal acts as a covering agent.

[0045] Table 2 The composition of the lead-free silicon brass alloy of the present invention (wt%)

[0046]

[0047] In this embodiment, the rare earth elements RE are lanthanum 0.02 a...

Embodiment 3

[0050] According to the alloy composition mentioned in Table 3, the copper-silicon-zinc alloy is smelted first, and the smelting temperature is 1250°C. After it is completely melted, the intermediate alloy of iron and aluminum is added and stirred evenly, and after standing for 13 minutes, then sequentially The master alloy of manganese, boron, tin, phosphorus and rare earth elements is added, wherein: tin, phosphorus and rare earth elements are added in the form of zinc master alloy, and iron, aluminum, boron and manganese are added in the form of copper master alloy. , the mass fraction of copper or zinc is 80-90%. The slag was removed by stirring, and gravity casting was adopted after spraying fire. The casting temperature was 1060° C. and the casting speed was 1.3 mm / s to prepare alloy ingots.

[0051] When smelting, charcoal acts as a covering agent.

[0052] Table 3 Composition (wt%) of the lead-free silicon brass alloy of the present invention

[0053]

[0054] In ...

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Abstract

The invention belongs to the technical field of lead-free silicon brass alloy, especially relates to a free-cutting and corrosion-resistant lead-free silicon brass alloy and a preparation method thereof. The alloy is suitable for replacing the lead brass alloy for machining and is a good environment-friendly green metal material. The lead-free silicon brass alloy comprises the following components in percentage by weight: 59-63% of copper, 1-1.5% of silicon, 0.001-0.05% of aluminum, 0.001-0.01% of boron, 0.1-0.5% of iron, 0.1-0.2% of manganese, 0.1-0.15% of tin, 0.05-0.5% of phosphorus, 0.01-0.07% of rare earth element RE, and the balance of zinc and inevitable impurity. During the preparation, the copper-silicon-zinc alloy is firstly melted, the intermediate alloy of iron and aluminum is added into the completely melted copper-silicon-zinc alloy and the mixture alloy is uniformly stirred, the intermediate alloys of the manganese, the boron, the tin, the phosphorus and the rare earth element are sequentially added into the mixture alloy, the mixture alloy is stirred and slagged off, and finally the alloy ingot is formed after the flaming and gravity casting steps. The silicon is added into the lead-free silicon brass alloy to replace the lead, so that on the premise of not reducing the production cost, the lead-free silicon brass alloy has good cutting performance and excellent cold workability and hot workability.

Description

technical field [0001] The invention relates to the field of lead-free brass alloys, in particular to an easy-to-cut, corrosion-resistant lead-free silicon brass alloy and a preparation method thereof. The alloy is suitable for replacing mechanically processed lead-brass alloys, and is an excellent environmental protection type green metallic material. Background technique [0002] As the ace free-cutting material in metal materials, lead brass is widely used in instrumentation, electronic appliances, hardware, automobiles, etc. It is widely used in parts, refrigeration equipment and civil water supply systems. [0003] However, when leaded brass is used as taps, pipe joints and other drinking water pipes in civil water supply systems, under the action of impurities and organic acids in drinking water, lead in lead-containing copper alloys will slowly precipitate and dissolve in Water will cause irreversible damage to the blood and nervous system of the human body, such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04
Inventor 李文君刘刚王瑛
Owner 沈阳亚欧星海铜业有限公司
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