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Preparation method of molybdenum-cobalt-nickel high-hardness high-strength alloy

A high-strength alloy and high-hardness technology is applied in the field of preparation of molybdenum-cobalt-nickel high-hardness and high-strength alloys, which can solve the problems of reducing wear resistance, cracks, and easy cutting of high-hardness and high-strength alloys.

Inactive Publication Date: 2011-06-01
赵宏伟
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims at the problems existing in the above-mentioned prior art, and provides a method for preparing a molybdenum-drill-nickel high-hardness and high-strength alloy. On the basis of not reducing the wear resistance of the high-hardness and high-strength alloy, its bending strength is improved, and the alloy is solved. The blade is prone to cracks during welding and sharpening, and it is easy to hit the knife during cutting.

Method used

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  • Preparation method of molybdenum-cobalt-nickel high-hardness high-strength alloy

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Embodiment

[0011] The specific embodiment of the preparation method of the molybdenum-cobalt-nickel high-hardness and high-strength alloy of the present invention comprises first compounding compound carbide, cobalt powder and molybdenum carbide powder into a mixture according to certain requirements, and then unloading after wet grinding in a ball mill for 80 to 83 hours, Re-precipitate for 24 hours, dry and 100-mesh vibrating sieve, mix molding agent, press, release molding agent and keep warm at (1480-1500) ° C for 50 minutes for sintering and other processes.

[0012] Table 1 provides specific examples of the aforementioned chemical composition of the mixture and related batching methods. Table 2 provides the Rockwell hardness and flexural strength values ​​of molybdenum-cobalt-nickel high-hardness and high-strength alloys prepared according to the five specific examples in Table 1.

[0013] Table 1

[0014]

[0015] Table 2

[0016] Numbering

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Abstract

The invention relates to a preparation method of a molybdenum-cobalt-nickel high-hardness high-strength alloy, which comprises the following steps: proportioning MoC-NiC compound carbide, MoC powder and Co powder, carrying out ball milling, drying, doping with a forming agent, carrying out pressure forming, sintering and the like. The weight ratio of NiC to MoC in the compound carbide is 30:70-40:60; and in the proportioning process, the content of Co is controlled at (7.2-7.7) wt%, and the MoC powder of (1.2-1.8) um is adopted. The preparation method of the molybdenum-cobalt-nickel high-hardness high-strength alloy can enhance the bending strength, thereby solving the problem of high tendency to cracking of the alloy cutter blade during welding and sharpening, the problem of high tendency to breaking when the alloy cutter blade is used for cutting, and the like.

Description

technical field [0001] The invention relates to a method for preparing a molybdenum-cobalt-nickel high-hardness and high-strength alloy. Background technique [0002] At present, blades made of high-hardness and high-strength alloys are generally used for rough machining or semi-finishing of high-carbon steel or hot-forged steel. The preparation method of this kind of high-hardness and high-strength alloy generally includes the steps of mixing MoC-NiC composite carbide with MoC powder and Co powder, ball milling, drying, mixing with molding agent, compression molding and sintering, among which NiC in the composite carbide The weight ratio with MoC is 25:75-45:55, the weight ratio content of the binder metal Co is controlled at (5.8-6.3)%, and the particle size range of the MoC powder is selected at (2.5-3.5)um. The molybdenum-cobalt-nickel high-hardness and high-strength alloy produced in this way has good wear resistance, and the hardness (HRA) is 91.5. The disadvantage i...

Claims

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Application Information

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IPC IPC(8): C22C29/06
Inventor 赵宏伟
Owner 赵宏伟
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