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Chromium-containing hard alloy material and preparation process thereof

A cemented carbide and preparation technology, which is applied in the field of cemented carbide, can solve the problems of reducing the surface properties of products, and achieve the effects of improving electrical corrosion resistance, good comprehensive performance, and refining grains

Inactive Publication Date: 2021-07-09
上海钨睿新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing cemented carbide materials, in the process of electrical machining, will form a rather serious electrical corrosion layer within a certain size range from the surface, thereby significantly reducing the surface properties of the product

Method used

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  • Chromium-containing hard alloy material and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A chromium-containing hard alloy material and a preparation process thereof, comprising:

[0026] Tungsten carbide powder, cobalt powder, nickel powder, chromium powder and molybdenum powder;

[0027] The nickel powder content is 3.0wt%, the chromium powder content is 2.0wt%, the molybdenum powder content is 0.5wt%, the cobalt powder content is 10.5wt%, and the tungsten carbide powder content is 84wt%.

[0028] In this embodiment, preferably, the tungsten carbide powder, cobalt powder, nickel powder, chromium powder and molybdenum powder are mixed and ground according to the above proportions in a mixer, the speed of the mixer is 450r / min, and the grinding time is 35min.

[0029] In this embodiment, preferably, nickel powder, chromium powder, cobalt powder and molybdenum powder form a solid-solution bonding phase during sintering, and tungsten carbide powder is used to increase the hardness of the alloy material.

[0030] In this embodiment, preferably, the FSSS partic...

Embodiment 2

[0042] A chromium-containing hard alloy material and a preparation process thereof, comprising:

[0043] Tungsten carbide powder, cobalt powder, nickel powder, chromium powder and molybdenum powder;

[0044] The nickel powder content is 1.5wt%, the chromium powder content is 1.5wt%, the molybdenum powder content is 0.3wt%, the cobalt powder content is 10wt%, and the tungsten carbide powder content is 86.7wt%.

[0045] In this embodiment, preferably, the tungsten carbide powder, cobalt powder, nickel powder, chromium powder and molybdenum powder are put into the mixer according to the above proportions for mixing and grinding, the speed of the mixer is 450r / min, and the grinding time is 55min.

[0046] In this embodiment, preferably, the nickel powder, the chromium powder, the cobalt powder and the molybdenum powder form a solid solution bonding phase during sintering, and the tungsten carbide powder is used to increase the hardness of the alloy material.

[0047] In this embo...

Embodiment 3

[0056] A chromium-containing hard alloy material and a preparation process thereof, comprising:

[0057] Tungsten carbide powder, cobalt powder, nickel powder, chromium powder and molybdenum powder;

[0058] The nickel powder content is 2.0 wt%, the chromium powder content is 1.5 wt%, the molybdenum powder content is 0.2 wt%, the cobalt powder content is 11 wt%, and the tungsten carbide powder content is 85.3 wt%.

[0059] In this embodiment, preferably, the tungsten carbide powder, cobalt powder, nickel powder, chromium powder and molybdenum powder are mixed and ground according to the above proportions in a mixer, the speed of the mixer is 450r / min, and the grinding time is 45min.

[0060] In this embodiment, preferably, the nickel powder, the chromium powder, the cobalt powder and the molybdenum powder form a solid solution bonding phase during sintering, and the tungsten carbide powder is used to increase the hardness of the alloy material.

[0061] In this embodiment, pr...

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Abstract

The invention discloses a chromium-containing hard alloy material and a preparation process thereof. According to the technical scheme, the chromium-containing hard alloy material is characterized by comprising tungsten carbide powder, cobalt powder, nickel powder, chromium powder and molybdenum powder; and the content of the nickel powder is 1.0 wt%-3.0 wt%, the content of the chromium powder is 0.5 wt%-2.0 wt%, the content of the molybdenum powder is 0.1 wt%-0.5 wt%, the content of the cobalt powder is 10 wt%-12 wt%, and the content of the tungsten carbide powder is 80 wt%-90 wt%; According to the chromium-containing hard alloy material and the preparation process thereof, chromium powder instead of conventional chromium carbide powder is added, and part of chromium carbide is generated through the reaction, so that the dissolution, re-precipitation and growth of tungsten carbide grains in an alloy can be inhibited, and the tungsten carbide grains are refined; and in addition, a solid solution alloy phase is formed by bonding metal cobalt, nickel and molybdenum, and the electrocorrosion resistance of the alloy material can be improved.

Description

technical field [0001] The invention belongs to the technical field of hard alloys, and in particular relates to a chromium-containing hard alloy material and a preparation process thereof. Background technique [0002] Cemented carbide is a kind of cermet material made by powder metallurgy process of hard compound of refractory metal and bonding metal. Cemented carbide has a series of excellent properties such as high hardness, good wear resistance, high strength, heat resistance and corrosion resistance, especially its high hardness and wear resistance, which basically remain unchanged even at a temperature of 500 °C. It still has high hardness at 1000°C. Cemented carbide is widely used as tool material, such as turning tools, milling cutters, reamers, drills, boring tools, etc., for cutting cast iron, non-ferrous metals, plastics, chemical fibers, graphite, glass, stone and ordinary steel, and can also be used for Cutting heat-resistant steel, stainless steel, high mang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05C22C1/10B22F9/04B22F3/16
CPCC22C29/08C22C1/051C22C1/1084B22F9/04B22F3/16B22F2009/041B22F2302/10
Inventor 白佳声孙卫权
Owner 上海钨睿新材料科技有限公司
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