A kind of high-hardness wear-resistant copper alloy for plastic mold and preparation method thereof

A plastic mold, high hardness technology, applied in the field of alloy materials, can solve problems such as high and no more than 160HV

Inactive Publication Date: 2017-10-20
XI AN JIAOTONG UNIV
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  • Abstract
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Problems solved by technology

There are also SiC particles reinforced Cu(Cr) matrix composite materials prepared by research, when the SiC content reaches 20Vol%, the hardness is the highest and does not exceed 160HV

Method used

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  • A kind of high-hardness wear-resistant copper alloy for plastic mold and preparation method thereof
  • A kind of high-hardness wear-resistant copper alloy for plastic mold and preparation method thereof
  • A kind of high-hardness wear-resistant copper alloy for plastic mold and preparation method thereof

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Embodiment

[0034] A kind of preparation method of high-hardness wear-resistant copper alloy for plastic mould, raw material Mo powder, Cr powder, copper powder particle size all are 200 orders, and purity is 99%, and concrete technological process is as follows:

[0035] 1. Evenly mix the raw material Mo powder and Cr powder according to the mass ratio of 1:1, and mechanically grind on a vibrating rod mill for 16 hours to obtain high-energy Cr(Mo) pre-alloyed solid solution powder. During the grinding process, the grinding tank is vacuumed Protected by an argon atmosphere, dry grinding and wet extraction are adopted after grinding to ensure that the powder is not oxidized during the whole process, and then dried in a vacuum drying oven (70-80°C) for use; by figure 1 It can be seen that the Mo peak and the Cr peak no longer exist in the XRD results, and only the Cr(Mo) solid solution peak is displayed, indicating that the solid solution process of Mo and Cr has been realized, and a high-en...

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Abstract

The invention provides a high-hardness wear-resistant copper alloy for a plastic mold and a preparation method thereof. The copper alloy is composed of the following components in terms of mass fraction: Mo: 8-10%, Cr: 8-10%, Cu: ≥ 78% And <80%, the remainder is impurities. The invention mainly utilizes the non-equilibrium alloy preparation process of mechanical alloying, so as to realize a large amount of solid solution of Mo and Cr, two alloy elements that are difficult to be dissolved in Cu, and the solid solubility of Cr and Mo in Cu is calculated by mass fraction. More than 8%, in the subsequent hot pressing sintering process, Mo and Cr have a certain degree of dispersion and precipitation. Through the combined action of dispersion and solid solution strengthening, the hardness of the Cu alloy is greatly improved, and the hardness reaches more than 38HRC, and the thermal conductivity reaches The Cu-Cr-Mo alloy above 80W / K·m is a high-hardness copper alloy that can meet the performance requirements of plastic mold materials and does not contain beryllium.

Description

technical field [0001] The invention relates to alloy materials, in particular to a high-hardness wear-resistant copper alloy for plastic molds and a preparation method thereof. Background technique [0002] At present, tool steel and beryllium copper alloy are mainly used to meet the performance requirements of plastic mold materials. Compared with the widely used tool and die steel, copper alloy mold has good thermal fatigue resistance, not only high thermal conductivity, but also good corrosion resistance, so it can shorten the injection molding cycle, reduce the warping deformation of injection molded products, and effectively improve the The quality and production efficiency of plastic parts are the main materials commonly used for key parts of plastic molds. Except for beryllium bronze, copper alloys used in industrial processing, casting and powder metallurgy generally have low hardness and are not suitable as plastic mold materials. The copper alloy used as plastic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/04
Inventor 席生岐孙崇锋周赟郑晓雪党晓凤
Owner XI AN JIAOTONG UNIV
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