Copper-zinc alloy

An alloy, copper-zinc technology, applied in the field of metal materials, can solve the problems that the hardness and toughness of copper-zinc alloys cannot meet the actual needs, and achieve the effects of high toughness, stable machine tool processing, and increased hardness and toughness

Active Publication Date: 2017-02-22
SHENZHEN CITY DAYS CHAU TIME TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, in the high-end watch industry, the hardness and toughness of the HPb63-3 copper-zinc alloy still cannot meet the actual needs

Method used

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Experimental program
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Embodiment Construction

[0032] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0033] Table 1 Composition of copper-zinc alloy

[0034]

[0035]

[0036] Table 2 Performance Characterization of Copper-Zinc Alloy

[0037]

[0038] The elongation δ10, elongation δ5, and tensile strength of the above alloy materials are obtained by testing according to the method recorded in GBT228-2002.

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Abstract

The invention provides a copper-zinc alloy. The copper-zinc alloy comprises the following components including, by weight, 62.1%-68% of Cu, 1%-5% of Pb, 0.7%-2.5% of Ag and the balance Zn and inevitable impurities. After Ag is added, the chemical materials react with one another, an Ag-Cu alloy can be formed easily, the hardness and tenacity of materials are improved, the hardness is approximately 170 HV, and the material state can be maintained in the machining process of wrist watch parts. Since the hardness and the tenacity are improved, the mass of materials can be better reflected in the machining process, high-quality parts can be machined, and meanwhile, machining by a machine tool is more stable. The machined parts are high in tenacity, high in surface quality and good in durability.

Description

technical field [0001] The present invention relates to metallic materials, in particular to copper-zinc alloys. Background technique [0002] In the past, lead brass materials used for watches only contained Cu, Pb, and Zn, with a hardness of about 163HV and general toughness. It adopts copper-zinc alloy of HPb63-3 type, which has the characteristics and scope of application: lead brass with high lead content, not suitable for hot processing, excellent machinability, high wear reduction performance, other properties and HPb59-1 is similar. [0003] The chemical composition (% by weight) of the copper-zinc alloy of the HPb63-3 model is: [0004] Copper Cu: 62.0~65.0; [0005] Zinc Zn: balance; [0006] Lead Pb: 2.4~3.0; [0007] Impurities ≤ 0.75. [0008] The mechanical properties of copper-zinc alloy of HPb63-3 type are: [0009] Tensile strength σb (MPa): ≥390; [0010] Elongation δ10(%): ≥10; [0011] Elongation δ5(%): ≥12. [0012] Note: Longitudinal room temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C9/04C22C1/02C22C1/06
CPCC22C1/02C22C1/06C22C9/04
Inventor 崔纪伟
Owner SHENZHEN CITY DAYS CHAU TIME TECH CO LTD
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