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High-hardness wear-resistant copper alloy for plastic mould 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, and achieve the effect of improving hardness

Inactive Publication Date: 2015-04-29
XI AN JIAOTONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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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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  • High-hardness wear-resistant copper alloy for plastic mould and preparation method thereof
  • High-hardness wear-resistant copper alloy for plastic mould and preparation method thereof
  • High-hardness wear-resistant copper alloy for plastic mould 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 mould and a preparation method thereof. The copper alloy provided by the invention is composed of the following components in percentage by weight: 8-10% of Mo, 8-10% of Cr, more than or equal to 78% and less than 80% of Cu, and the balance of impurities. According to the invention, mechanical alloying, namely a non-equilibrium alloy preparation process, is mainly utilized, so that the two alloy elements including Mo and Cr difficult to solidly solute in Cu are solidly solute greatly; the solid solubility of Cr and Mo in Cu is beyond 8% in terms of weight percentage; a certain degree of dispersed precipitation of Mo and Cr exists in the subsequent hot-pressing and sintering processes; the hardness of Cu alloy is greatly increased under the combined action of dispersed precipitation and solution strengthening; therefore, the Cu-Cr-Mo alloy, the hardness of which is above 38 HRC and the heat conductivity of which is above 80 W / K.m, is obtained; and the alloy disclosed by the invention is a high-hardness alloy, which can satisfy the material property requirements of the plastic mould and is free from 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 Applications(China)
IPC IPC(8): C22C9/00C22C1/04
Inventor 席生岐郑晓雪周赟孙崇锋党晓凤
Owner XI AN JIAOTONG UNIV
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