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Preparation process of extra-coarse-grain hard-alloy mixing material

A cemented carbide and preparation technology, which is applied in the field of cemented carbide, can solve the problems of hard phase powder and binder phase powder delamination, poor uniformity of binder phase powder pool, etc., and achieve the effect of not being easy to break

Active Publication Date: 2014-08-27
春保森拉天时钨钢(天津)有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a preparation process of ultra-coarse-grained cemented carbide mixture, solve the problem of delamination of hard phase powder and binder phase powder, and the problem of binder phase powder pool and various parts. The problem of poor uniformity

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with example.

[0018] A preparation process for an ultra-coarse-grained cemented carbide mixture, comprising the following steps:

[0019] 1. Alloy balls and alloy ball materials are configured according to a volume ratio of 1:1 or less, and solvents are added for ball milling, and the ball milling time is more than 12 hours;

[0020] In this embodiment, the size of the alloy balls is controlled below 1-3mm, and the small ball weight can reduce the crushing of hard phase powder (WC, TaC, W, TiC) particles, so that the sintered hard phase powder (WC, TaC, W, TiC) particles are closer to the original particles. The alloy ball is made of overestimated coarse-grained hard alloy material, the content of binder phase powder (CO, Fe, Ni) is greater than 15%, and the average grain size is greater than 3 μm, and the raw material configuration is carried out. The time of ball milling is related to the grain s...

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Abstract

The invention relates to a preparation process of an extra-coarse-grain hard-alloy mixing material. The main technical characteristics are as follows: the preparation process comprises the steps of (1) configuring an alloy ball with the diameter being 1-3mm and alloy ball material, adding a solvent, then conducting ball milling with the ball milling time more than 12h; (2) drying discharged ball-contained materials, then drying and sieving to remove the alloy ball to obtain the extra-coarse-grain hard-alloy mixing material. According to the preparation process, the design is reasonable, the layering of hard-phase powders (WC, TaC, W and TiC) and a binder-phase powders (CO, Fe and Ni) can be effectively avoided, the problem that the uniformity of a binder-phase powder tank and all parts is not good is solved, and the quality of a product is improved.

Description

technical field [0001] The invention belongs to the technical field of cemented carbide, and in particular relates to a preparation process of an ultra-coarse-grained cemented carbide mixture. Background technique [0002] In the production of traditional cemented carbide mixtures, no matter whether alcohol, acetone or other ball milling media are used, the stratification of the mixture cannot be prevented, that is, the hard phase powder (WC, TaC, W, TiC) and the binder phase powder ( The specific gravity and particle size of CO, Fe, Ni) are different, resulting in different sedimentation speeds, and it is easy to cause the mixture to not be mixed uniformly. This situation is especially serious in the production of ultra-coarse cemented carbide grades. Hard phase powder And the binder phase powder can have obvious delamination phenomenon within 2 minutes after static or unloading. This phenomenon makes the technical purpose of ball milling and mixing invalid, resulting in a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04C22C1/05
Inventor 张博勋
Owner 春保森拉天时钨钢(天津)有限公司
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