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Superfine tungsten carbide coated high-speed steel composite powder and preparation method thereof

A composite powder, high-speed steel technology, applied in gaseous chemical plating, transportation and packaging, metal processing equipment, etc., can solve problems affecting processing performance, mechanical properties and service life, local stress concentration, coarse particles The effect of easy mass production, improved service life and excellent mechanical properties

Active Publication Date: 2022-07-08
HENAN YINGCHUAN NEW MATERIAL INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the composition segregation in the milling process, W is combined with the C element added inside the melt, and M is formed during the preparation process. 2 C and M 6 Coarse network carbides of C lead to the problem of coarse WC particles, which cause local stress concentration in the material and lead to cracks, which seriously affect the processing performance, mechanical properties and service life

Method used

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  • Superfine tungsten carbide coated high-speed steel composite powder and preparation method thereof

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Effect test

Embodiment 1

[0036] This embodiment provides a preparation method of tungsten carbide-coated high-speed steel composite powder, and the preparation method includes the following steps:

[0037] (1) The high-speed steel powder with a particle size of 1 μm-30 μm is placed in a fluidized state in the protective atmosphere of the fluidized bed reactor.

[0038] (2) On the basis that step (1) is continuously carried out, the tungsten source and the reaction gas are synchronously introduced into the fluidized bed reactor, mixed with the high-speed steel powder, the mixing temperature is 700 ° C, and the mixing time is 60 min. The temperature is 300°C, the gas flow rate is 70ml, and the reaction gas gas flow rate is 60ml.

[0039] (3) gas-solid separation after the reaction is completed to obtain tungsten carbide-coated high-speed steel composite powder.

[0040] figure 1 The SEM image of the tungsten carbide-coated high-speed steel composite powder obtained by the preparation method provided i...

Embodiment 2

[0043] This embodiment provides a preparation method of tungsten carbide-coated high-speed steel composite powder, and the preparation method includes the following steps:

[0044] (1) The high-speed steel powder with a particle size of 1 μm-30 μm is placed in a fluidized state in the protective atmosphere of the fluidized bed reactor.

[0045] (2) On the basis that step (1) continues to be carried out, the tungsten source and the reaction gas are synchronously introduced into the fluidized bed reactor, mixed with the high-speed steel powder, the mixing temperature is 850 ° C, and the mixing time is 90 min. The temperature is 200°C, the gas flow rate is 80ml, and the reaction gas gas flow rate is 150ml.

[0046] (3) gas-solid separation after the reaction is completed to obtain tungsten carbide-coated high-speed steel composite powder.

[0047] The tungsten carbide-coated high-speed steel composite powder obtained by the preparation method provided in this embodiment has a tu...

Embodiment 3

[0049] This embodiment provides a preparation method of tungsten carbide-coated high-speed steel composite powder, and the preparation method includes the following steps:

[0050] (1) The high-speed steel powder with a particle size of 1 μm-30 μm is placed in a fluidized state in the protective atmosphere of the fluidized bed reactor.

[0051] (2) On the basis that step (1) continues to be carried out, the tungsten source and the reaction gas are simultaneously introduced into the fluidized bed reactor, mixed with the high-speed steel powder, the mixing temperature is 900 ° C, and the mixing time is 120 min. The temperature is 330°C, the gas flow rate is 90ml, and the reaction gas gas flow rate is 100ml.

[0052] (3) gas-solid separation after the reaction is completed to obtain tungsten carbide-coated high-speed steel composite powder.

[0053] The tungsten carbide-coated high-speed steel composite powder obtained by the preparation method provided in this embodiment has a ...

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Abstract

The invention relates to superfine tungsten carbide coated high-speed steel composite powder and a preparation method thereof. The preparation method comprises the following steps: enabling high-speed steel powder to be in a fluidized state in a protective atmosphere; high-speed steel particles, a tungsten source and reaction gas are mixed for vapor deposition; and carrying out gas-solid separation to obtain the superfine tungsten carbide coated high-speed steel composite powder. According to the superfine tungsten carbide coated high-speed steel composite powder prepared through the method, uniform distribution of tungsten carbide on the microscopic scale is achieved, the size of tungsten carbide is refined, and the performance of powder metallurgy high-speed steel can be remarkably improved.

Description

technical field [0001] The invention belongs to the field of powder metallurgy of steel alloys, and relates to a preparation method of a coated high-speed steel composite powder, in particular to an ultrafine tungsten carbide coated high-speed steel composite powder and a preparation method thereof. Background technique [0002] High-speed steel has the characteristics of high hardness, high wear resistance, high heat resistance and excellent strength and toughness matching. It is mainly used to manufacture metal cutting tools and extrusion dies. Tungsten series high-speed steel is the main high-speed steel material. Commonly used tungsten series high-speed steel such as W18Cr4V, W6Mo5Cr4V2, etc., its excellent wear resistance is related to the large amount of high-hardness carbides in its structure. In order to avoid carbide segregation and refine carbides caused by smelting production, powder metallurgy high-speed steel appeared after the 1960s. Because the powder metallu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/16B22F3/02B22F3/10C22C38/04C22C38/22C22C38/24C22C38/44C22C38/46C23C16/32C23C16/44
CPCC22C38/04C22C38/24C22C38/22C22C38/46C22C38/44B22F3/02B22F3/1017C23C16/32C23C16/4417B22F2009/041
Inventor 芦亚楠杨亚锋崔景毅安文文
Owner HENAN YINGCHUAN NEW MATERIAL INC
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