Low-nickel leadless free-cutting cupronickel and preparation method thereof

A technology of easy-cutting and white copper, which is applied in the preparation of the alloy, in the field of low-nickel lead-free white copper alloy, can solve the problems that the research of low-nickel lead-free free-cutting white copper alloy material has not yet been seen, and achieve good cutting performance and low production cost. Low, the effect of avoiding pollution

Inactive Publication Date: 2013-05-01
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there are many researches on lead-free free-cutting copper alloy materials at home and abroad, and some progress has been made, such as patents: "A bismuth-containing lead-free free-cutting zinc white cop

Method used

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  • Low-nickel leadless free-cutting cupronickel and preparation method thereof
  • Low-nickel leadless free-cutting cupronickel and preparation method thereof
  • Low-nickel leadless free-cutting cupronickel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] In the preparation method of low-nickel lead-free free-cutting cupronickel of the present invention, the batching calculation needs to select alloy elements and their dosages according to the performance requirements and alloy properties of the cupronickel alloy, carry out alloy composition design and batching calculation, and prepare alloy charge.

[0035] The low-nickel lead-free free-cutting cupronickel of the present invention is smelted and cooled to 1100-1200 DEG C for casting. The alloy ingot is as follows: figure 1 As shown, it has a silvery white luster.

[0036] Test and analyze the cutting performance of alloy ingots, and analyze alloy samples such as Figure 2-Figure 6 As shown, the results show that the alloy prepared by the method of the present invention has good machinability.

Example Embodiment

[0037] Example 1

[0038] According to the test plan described in Table 1, 77.35% of electrolytic copper, 12% of Mn, and 1% of Ni were added to the crucible and placed in the melting furnace; after adding borax as a covering agent, the temperature was raised to 1250-1350 °C; electrolytic copper , after the manganese and nickel are completely melted, add 0.65% "Mg+30%Ca" master alloy, and smelt for 15 to 20 minutes; cool down to 1200℃, add 1% pure aluminum and 8% pure zinc after stirring, and smelt 5 ~10 minutes, heat preservation for 5 ~ 10 minutes; cooling to 1100 ~ 1200 ℃ for casting and ingot casting.

[0039] Table 1 Example of the test scheme of the present invention (alloying elements and content %)

[0040] alloy element

Example Embodiment

[0041] Example 2

[0042] According to the test plan described in Table 2, 76% of electrolytic copper, 12% of Mn and 2% of Ni were added to the crucible and placed in the melting furnace; after adding borax as a covering agent, the temperature was raised to 1250-1350 °C; After the manganese and nickel are completely melted, add 1.0% "Mg+30%Ca" master alloy and smelt for 15-20 minutes; cool down to 1200℃, add 1% pure aluminum and 8% pure zinc after stirring, and smelt 5 ~10 minutes, heat preservation for 5 ~ 10 minutes; cooling to 1100 ~ 1200 ℃ for casting and ingot casting.

[0043] Table 2 Example of the test scheme of the present invention (alloying elements and content %)

[0044] alloy element

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PUM

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Abstract

The invention discloses low-nickel leadless free-cutting cupronickel which comprises the following components by weight percentage: 72.0-77.35% of cuprum, 1-5% of nickel, 12% of manganese, 8% of zinc, 1% of aluminum, 0.65-2.0% of magnesium and calcium, and the balance of unavoidable impurities. According to the cupronickel, alloy elements such as the calcium and magnesium substitute lead, so that the cutting properties of the cupronickel can be improved, a content of the nickel in the cupronickel is reduced, the production cost of the cupronickel is lowered, and requirements on the mechanical cutting properties of the cupronickel, safety and environmental protection are met.

Description

technical field [0001] The invention relates to a white copper alloy material, in particular to a low-nickel lead-free white copper alloy with no pollution, easy cutting and good machinability, and also relates to a preparation method of the alloy. Background technique [0002] Nickel (Ni), manganese (Mn), zinc (Zn), aluminum (Al) and other elements are added to copper to make alloys such as nickel cupronickel, manganese cupronickel, zinc cupronickel, etc. Physical, chemical, mechanical properties, and widely used in instrumentation, electronic appliances, clocks, glasses, spare parts and other manufacturing industries. [0003] Nickel white copper and zinc white copper produced at home and abroad have the characteristics of good performance and processing performance, and are widely used in the market, but the nickel content in the alloy is relatively high, usually above 16%, due to limited nickel resources, high prices and Nickel element causes allergies to human skin and...

Claims

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Application Information

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IPC IPC(8): C22C9/05C22C1/02
Inventor 蔡薇柳瑞清邱光斌王刚柳羏樊小伟
Owner JIANGXI UNIV OF SCI & TECH
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