Preparation method of graphene composite high speed tool steel

A high-speed tool steel and graphene composite technology, applied in the field of high-speed tool steel materials, can solve the problems of inability to meet the processing requirements of high-performance parts, low toughness, insufficient strength and hardness, achieve long service life, avoid oxidation, simplify The effect of the process steps

Active Publication Date: 2019-04-02
AVIC BEIJING INST OF AERONAUTICAL MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the performance of the existing high-speed tool steel can only meet the cutting requirements of general materials. For high-performance parts, the strength and hardness of the existing high-speed tool steel are still not high enough, and the toughness is low, which cannot meet the processing of high-performance parts. need

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] The invention provides a kind of preparation method of graphene composite high-speed tool steel, comprising the following steps:

[0038] S10, providing a mixed solution, the mixed solution including a volatile organic solvent, graphene powder and high-speed tool steel powder;

[0039] S20, drying the mixed liquid to obtain a mixed powder;

[0040] S30, loading the mixed powder after the drying treatment in a bag for vacuum degassing and sealing the bag;

[0041] S40, subjecting the sealing envelope loaded with the mixed powder to hot isostatic pressing, the temperature of the hot isostatic pressing is 950° C. to 1300° C., so that the mixed powder forms a composite material green body;

[0042] S50, separating the composite material green body from the wrapping.

[0043] In the embodiment of the present invention, graphene-composite high-speed tool steel is prepared by mechanically mixing graphene and high-speed tool steel powder, vacuum pumping and hot isostatic pres...

Embodiment 1

[0081] Provide raw materials of the following quality, including graphene powder and powders of various elements that can form high-speed tool steel, a total of 1000 grams, including 2 grams of graphene, 16 grams of amorphous carbon, 47 grams of Cr, 18 grams of Mo, and 49 grams of V grams, W 110 grams, Co 80 grams, Si 6 grams, Mn 3 grams, and the balance is Fe. The average diameter of the powders of the individual elements constituting the high-speed tool steel is 50 μm.

[0082] Put the graphene powder and the simple substance powder of each element into the V-type powder mixer for powder mixing for 8 hours;

[0083] Disperse the mixed powder in absolute ethanol, dry the mixture under mechanical stirring at 40°C to form a slurry, transfer it to a vacuum oven for thorough drying at a drying temperature of 100°C, and obtain a mixed powder;

[0084] The dried mixed powder is put into a cylindrical steel ladle and vacuumed until the vacuum pressure is 1×10 -2 After Pa, heat to ...

Embodiment 2

[0091] The preparation method is basically the same as that in Example 1, except that, among the raw materials, the average diameter of the powders of the elements constituting the high-speed tool steel is less than 10 μm.

[0092] The mechanical properties of the prepared graphene composite high-speed tool steel were measured, and the results are shown in Table 1. It can be seen from Table 1 that the performance of the steel material prepared in Example 1 is better than that of Example 2 in terms of flexural strength, hardness and impact toughness, etc., indicating that particle size control in an appropriate range is conducive to enhancing graphene composite high-speed Mechanical properties of tool steels.

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Abstract

The invention relates to a preparation method of graphene composite high speed tool steel. The reparation method of the graphene composite high speed tool steel comprises the following steps: a mixedsolution is provided, the mixed solution comprises a volatile organic solvent, a graphene powder body, and a high-speed tool steel power body; drying treatment is conducted to the mixed solution so that a mixed power body can be achieved; vacuumizing degassing treatment can be conducted after the mixed power body which is subjected to drying treatment is loaded inside a package sheath and the package sheath is sealed; hot isostatic pressing treatment is conducted to the sealed package sheath which is loaded with the mixed power body, the temperature of the hot isostatic pressing is 950-1300 DEG C, thus the mixed power body forms the graphene composite high speed tool steel; and the graphene composite high speed tool steel is separated from the package sheath.

Description

technical field [0001] The invention relates to the technical field of high-speed tool steel materials, in particular to a preparation method of graphene composite high-speed tool steel. Background technique [0002] High-speed tool steel is mainly used to prepare high-speed cutting tools, such as drill bits, milling cutters and band saws, etc. It has the characteristics of high red hardness, good wear resistance, and high strength. The rapid development of modern manufacturing industry requires high-speed tool steel to have better performance and stability, so as to improve its processing efficiency and processing accuracy. In recent years, the quality and production technology of high-speed tool steel at home and abroad have achieved rapid development. The development of high-speed tool steel has also promoted the development of industrial products in the direction of advanced, individualized, and high added value. However, the performance of the existing high-speed tool ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/24C22C38/22C22C38/30C22C38/04C22C38/02C22C33/02C21D1/18C21D8/00
CPCC21D1/18C21D8/005C22C33/0285C22C38/02C22C38/04C22C38/22C22C38/24C22C38/30
Inventor 张海平曹振王旭东李炯利郭建强
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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