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Nonmagnetic hard alloy and preparing method thereof

A technique of cemented carbide and a production method, which is applied in the field of material science, can solve problems such as poor corrosion resistance, poor wear resistance, uneven distribution of WC grain size, and reduced overall performance, so as to achieve good wear resistance and ensure Smoothness, quality-enhancing effects

Inactive Publication Date: 2004-01-28
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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Problems solved by technology

When these two materials are used to produce magnetic tile molds, the sticky material is serious, it is not easy to demould, the pressing yield is low, and the production efficiency is also low; in addition, because the magnetic hard alloy material is easy to oxidize, corrosion resistance and wear resistance Poor, not only reduces the overall performance, but also greatly limits the scope of use
However, the existing magnetic cemented carbide is usually processed by wire cutting, and the WC grain size distribution is uneven, resulting in poor consistency of internal stress.
Therefore, the magnetic tile mold produced by this material is prone to cracking and deformation problems during use due to the inconsistency of internal stress.

Method used

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Embodiment

[0034] 1. Ingredients:

[0035] Carry out batching according to following ratio (by weight):

[0036] Tungsten carbide (WC): 84.4%;

[0037] Nickel (Ni): 14%;

[0038] Chromium (Cr): 0.5%;

[0039] Molybdenum (Mo): 1.1%;

[0040] Among them: the technical requirements of tungsten carbide (WC): WC≥99.5%, total carbon: 5.85%-5.97%; Fe≤0.03%; Fibonacci particle size: 18μm-23μm;

[0041] Technical requirements for nickel (Ni) powder: Ni≥99.5%, O≤0.5%, Fe≤0.03%;

[0042] Technical requirements for chromium (Cr) powder: Cr≥99.0%, Fe≤0.02%;

[0043] Technical requirements for molybdenum (Mo) powder: Mo≥99.0%, O≤0.5%, Fe≤0.03%;

[0044] Second, the production method and process:

[0045] 1. Ball milling:

[0046] Put the mixed material according to the above formula into the ball mill, and add industrial alcohol and non-magnetic alloy steel balls into the ball mill for grinding; the content of industrial alcohol is ≥95%, and the specific gravity is ≤0.82g / cm 3 ; The hardness ...

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Abstract

The present invention discloses a non-magnetic hard alloy and its preparation method. Said non-magnetic hard-alloy used wolfram carbide (WC) as main component, and is formed by adding Ni, Cr and Mo and its prparation method includes: bending material, wet grinding, filtering mixed slurry, drying and seiving, forming, vacuum sintering and checking. As compared with existent technology said invented product has the advantages of high hardness, good abrasive resistance, small friction coefficience, good polishing property, high compression strength and good rigidity, etc.

Description

1. Technical field [0001] The invention relates to a cemented carbide material and a manufacturing method thereof, belonging to the technical field of material science. 2. Background technology [0002] At present, the materials used for magnetic tile molds in the magnetic material production industry are generally non-magnetic steel and magnetic hard alloy materials. When these two materials are used to produce magnetic tile molds, the sticky material is serious, it is not easy to demould, the pressing yield is low, and the production efficiency is also low; in addition, because the magnetic hard alloy material is easy to oxidize, corrosion resistance and wear resistance Poor, not only reduces the overall performance, but also greatly limited the scope of use. However, the existing magnetic hard alloys are usually processed by wire cutting, and the WC grain size distribution is uneven, resulting in poor consistency of internal stress. Therefore, the ma...

Claims

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Application Information

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IPC IPC(8): C22C29/08
Inventor 何时金吴志荣金玲红
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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