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High-performance elastic copper alloy and preparation and processing method thereof

A technology of elastic copper alloy and processing method, which is applied in the field of high-performance elastic copper alloy and its preparation and processing, can solve problems such as easy cracking of ingots and unfavorable processing, and achieve simple preparation process, excellent machinability, and technological process short effect

Inactive Publication Date: 2012-07-11
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention also solves casting defects such as ingot suction and shrinkage cavity during the smelting process, and the problems that the ingot is easy to crack in the process of pressure processing, which is not conducive to subsequent processing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Carry out batching according to the mass percentage of each element listed in Table 1. Put the weighed electrolytic nickel and electrolytic copper into the crucible, cover it with a 5mm charcoal layer, and then spread evenly on the charcoal layer with fine graphite flakes, the purpose is to cover the gap left by the charcoal layer, and then seal it with a graphite plate The mouth of the crucible; put the crucible into the intermediate frequency furnace, heat rapidly, and melt according to the melting process; when the raw materials in the crucible are completely melted, add silicon, cover the melt and the crucible with charcoal, graphite flakes, and graphite plates; after the silicon is completely melted, add Cobalt powder, magnesium, and then charcoal, graphite flakes, and graphite plates cover the melt and crucible; the melting temperature is 1250 ° C, stirred, and kept for 5 minutes; out of the furnace, slag removal, iron mold casting, and the casting temperature is c...

Embodiment 2

[0035] Carry out batching by each element mass percentage listed in Table 2. Put the weighed electrolytic nickel and electrolytic copper into the crucible, cover it with a 5mm charcoal layer, and then spread evenly on the charcoal layer with fine graphite flakes, the purpose is to cover the gap left by the charcoal layer, and then seal it with a graphite plate The mouth of the crucible; put the crucible into the intermediate frequency furnace, heat rapidly, and melt according to the melting process; when the raw materials in the crucible are completely melted, add silicon, cover the melt and the crucible with charcoal, graphite flakes, and graphite plates; after the silicon is completely melted, add Copper-tin master alloy and cobalt powder, then charcoal, graphite flakes, and graphite plates cover the melt and crucible; the melting temperature is 1200 ° C, stirred, and kept for 5 minutes; out of the furnace, slag removal, iron mold casting, the casting temperature is controlle...

Embodiment 3

[0040] Carry out batching according to the mass percentage of each element listed in Table 3. Put the weighed electrolytic nickel and electrolytic copper into the crucible, cover it with a 5mm charcoal layer, and then spread evenly on the charcoal layer with fine graphite flakes, the purpose is to cover the gap left by the charcoal layer, and then seal it with a graphite plate Crucible mouth; put the crucible into the intermediate frequency furnace, heat rapidly, and melt according to the melting process; when all the raw materials in the crucible are melted, add silicon, cover the melt and the crucible with charcoal, graphite flakes, and graphite plates; the melting temperature is 1300 ° C, Stirring and heat preservation for 5 minutes; taking out of the furnace, removing slag, and casting in iron molds, the casting temperature is controlled at 1200°C to obtain the alloy.

[0041] Table 3 Mass percentage of each element in the alloy

[0042] alloy element

[0043] ...

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Abstract

The invention relates to high-performance elastic copper alloy and a preparation and processing method thereof. According to the weight percentage, the high-performance elastic copper alloy comprises the basic components as follows: 1 to 4 percent of Ni, 0.4 to 1 percent of Si, 0.5 to 1.5 percent of Co, and the rest percent of Cu, wherein the components in a copper alloy product need to satisfy the conditions as follows: (a) the content of Ni or Si is larger than or equal to 2.5 percent and smaller than or equal to 5 percent; (b) the content of Ni plus Si is larger than or equal to 1.4 percent and smaller than or equal to 4.0 percent; (c) the content of Ni plus Co is larger than or equal to 1.5 percent and smaller than or equal to 4 percent; and (d) the content of Ni plus Si or the content of C is larger than or equal to 1 percent and smaller than or equal to 5.0 percent. The preparation and processing method of the high-performance elastic copper alloy comprises the step: a, material burdening, material feeding, melting and casting which are conducted according to the weight percent; b, surface milling; c, hot rolling; d, solid solution treatment; e, cold processing; f, primary aging; g, cold processing; h, secondary ageing; i, pickling; and j, finished product annealing. The tensile strength Sigma b of the copper alloy is 780 to 950MPa, the plastic elongation rate Delta of the copper alloy is 4 to 10 percent, and the electric conductivity of the copper alloy is 35 to 55 percent according to an international annealed copper standard (IACS). The copper alloy has the advantages of high elasticity, high strength, high fatigability, good heat resistance and high electric conductivity.

Description

technical field [0001] The invention relates to a high-performance elastic copper alloy and its preparation and processing method, specifically a copper-nickel-silicon-cobalt alloy. The copper alloy has the characteristics of high strength, high elasticity, high fatigue resistance, and good heat resistance, and has both With the advantages of high conductivity and stress relaxation resistance, it is mainly used in various electronic components such as electrical connectors, springs, connectors, switches, contacts, etc. It can replace high-elastic beryllium copper in many occasions that require high conductivity. Background technique [0002] High-performance elastic copper alloy refers to an alloy that not only has excellent elasticity but also has high strength, electrical and thermal conductivity, and excellent high-temperature performance. The alloy material is mainly used as connectors, sensors, lead frames, conductive bridges and other materials in industries such as au...

Claims

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Application Information

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IPC IPC(8): C22C9/06C22C1/03C22F1/08
Inventor 黄国杰谢水生程磊熊柏青付垚米绪军肖翔鹏
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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