A nickel-free and lead-free free-cutting nickel-nickel copper and its preparation method

A free-cutting, cupronickel technology, applied in the preparation of the alloy, in the field of nickel-free lead-free cupronickel alloy, can solve problems such as no reports on lead-free nickel-free cutting free-cutting cupronickel alloy, and achieve good preparation cost advantage, low preparation cost, The effect of grain refinement

Inactive Publication Date: 2016-04-13
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In recent years, a series of nickel-free white copper materials and lead-free free-cutting white copper alloy materials have been researched and developed at home and abroad, such as: Cu-Mn-Zn-Al-Fe, CuMn 15 Zn 15 al 1 , Cu-Mn-Zn and other nickel-free copper alloys, and lead-free free-cutting nickel-copper alloy "a kind of secret-containing lead-free free-cutting zinc-nickel-nickel alloy" (patent number 200710118018.1), "a lead-free free-cutting zinc-nickel-nickel alloy" ( Patent No. CN200510061720.X), etc., but the patent of lead-free and nickel-free free-cutting cupronickel alloy has not been reported

Method used

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  • A nickel-free and lead-free free-cutting nickel-nickel copper and its preparation method
  • A nickel-free and lead-free free-cutting nickel-nickel copper and its preparation method
  • A nickel-free and lead-free free-cutting nickel-nickel copper and its preparation method

Examples

Experimental program
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preparation example Construction

[0039] In the preparation method of nickel-free and lead-free free-cutting cupronickel according to the present invention, the batching calculation needs to select alloy elements and their dosage according to the performance requirements of the cupronickel alloy and the properties of the alloy, carry out alloy composition design and batching calculation, and prepare the alloy charge.

[0040] The nickel-free and lead-free free-cutting cupronickel of the present invention is smelted and cooled to 1100-1200°C for casting. The alloy ingot is as figure 1 As shown, it has a silvery white luster.

[0041] Carry out cutting performance test analysis on alloy ingot, alloy sample analysis such as Figure 2-Figure 6 As shown, the results show that the alloy prepared by the method of the present invention has good cutting performance.

Embodiment 1

[0043]According to the test plan described in Table 1, first bake the added electrolytic copper in the melting furnace for 15-20 minutes; after adding borax as a covering agent, raise the temperature to 1250-1350 ° C; after the electrolytic copper is completely melted, add 10% Mn , 0.5% Si, where Mn and Si are added in the form of master alloys; smelting for 20-30 minutes, cooling down to 1250-1300°C, adding 1% "30%Ca+Mg", 0.03% Ce, where Ce is Cu -Ce is added in the form of master alloy; after stirring, add 0.5% pure aluminum; smelt for 10-15 minutes, add 8% pure zinc, keep warm for 5-10 minutes; cool down to 1100-1200°C for casting, ingot casting; alloy hot-rolling temperature The temperature is 850℃, the processing rate of hot rolling is 75%; the processing rate of cold rolling is 73%; the annealing rate is 750℃×2h.

[0044] Table 1 Example of the test program of the present invention (alloying elements and content %)

[0045]

Embodiment 2

[0047] According to the test plan described in Table 2, first bake the added electrolytic copper in the smelting furnace for 15-20 minutes; after adding borax as a covering agent, raise the temperature to 1250-1350 °C; 0.6% Si, where Mn and Si are added in the form of master alloy; smelt for 20-30 minutes, cool down to 1250-1300°C, add 1.2% "30%Ca+Mg", 0.05% Ce, where Ce is Cu- Ce is added in the form of master alloy; after stirring, add 0.5% pure aluminum; smelt for 10-15 minutes, add 10% pure zinc, keep warm for 5-10 minutes; cool down to 1100-1200°C for casting and ingot casting; alloy hot-rolling temperature is 850℃, hot rolling processing rate is 78%; cold rolling processing rate is 70%; annealing is 750℃×2h.

[0048] Table 2 Example of the test program of the present invention (alloying elements and content %)

[0049]

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Abstract

The invention discloses nickel-free and lead-free free-cutting cupronickel. The cupronickel alloy comprises the following components in percentage by weight: 10-15% of manganese, 8-13% of zinc, 0.5-0.8% of silicon, 0.5-1.5% of aluminium, 0.03-0.08% of rare-earth element cerium, 1-1.5% of calcium and magnesium, and the balance of copper and inevitable impurities. In the cupronickel alloy disclosed by the invention, manganese, zinc and aluminium have the same function with nickel in case of being added to copper, and can be used for improving the strength and elasticity of the alloy and keeping the silvery white colour of the alloy; and via the addition of silicon, calcium, magnesium and trace rare-earth element cerium, the machining property and cutting property of the alloy can be improved.

Description

technical field [0001] The invention relates to a white copper alloy material, in particular to a nickel-free and lead-free white copper alloy which is pollution-free, easy to cut and has good machining performance, and also relates to a preparation method of the alloy. Background technique [0002] Adding nickel element to copper alloy can improve the strength and corrosion resistance of the alloy, and greatly improve the elasticity of the copper alloy, but the nickel content in the alloy is relatively high, usually above 16%. Nickel-nickel is a copper alloy with nickel as the main alloying element, especially zinc-nickel-nickel (Cu-Ni-Zn) alloy, which not only has a silver-white appearance, but also has excellent corrosion resistance, high elasticity and good process performance Therefore, in addition to being used as a structural material, zinc nickel copper is also widely used to make metal products that are in contact with the human body. However, the cutting performan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/05C22C1/03C22F1/08
Inventor 柳瑞清蔡薇邱光斌王刚柳羏廖钰敏钟强强陆萌萌张英
Owner JIANGXI UNIV OF SCI & TECH
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