Steel bonded hard alloy and preparation method thereof

A technology of steel-bonded hard alloy and mixed powder, which is applied in the metal field, can solve the problems of low wear resistance, easy wear, and shorten the service life of wear-resistant sleeves, so as to improve wear resistance, prolong service life, and improve quenching hard effect

Inactive Publication Date: 2012-07-25
CHANGSHA WEISITAN METALLURGY PRODS
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  • Description
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AI Technical Summary

Problems solved by technology

Although the high-speed steel production process disclosed in this patent improves its strength, hardness and wear resistance to a certain extent, it is used for the wear-resistant sleeve of the stirring shaft of the engineering pumping machinery. In practical applications, the wear-resistant sleeve of the stirring shaft Low resistance, easy to wear, shorten the service life of the wear sleeve

Method used

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  • Steel bonded hard alloy and preparation method thereof

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preparation example Construction

[0040] The present invention also provides a preparation method of steel-bonded hard alloy, comprising the following steps:

[0041] a) Mix the following raw materials to obtain mixed powder: 1.5wt%-6.0wt% refractory carbide powder, 1.0wt%-3.0wt% tungsten disulfide powder, 1.0wt%-3.0wt% carbon powder , 0.1wt% to 0.5wt% manganese powder, 10.0wt% to 18.0wt% chromium powder, 1.0wt% to 5.0wt% molybdenum powder, greater than zero and less than or equal to 1.8wt% silicon powder, greater than zero and less than Nickel powder equal to 5.0wt%, the balance being iron powder;

[0042] b) press-molding the mixed powder to obtain a steel-bonded cemented carbide green body;

[0043] c) Sintering the steel-bonded cemented carbide green body at a sintering temperature of 1130°C to 1310°C;

[0044] d) Quenching and tempering the steel-bonded hard alloy body obtained in step c), to obtain a steel-bonded hard alloy.

[0045] Step a) is a process of mixing raw materials. In order to fully mix ...

Embodiment 1

[0052] (1) With 1.5wt% carbon powder, 0.8wt% silicon powder, 0.25wt% manganese powder, 13.0wt% chromium powder, 1.0wt% molybdenum powder, 0.5wt% nickel powder, 3.0wt% Tungsten carbide powder, 3.0wt% tungsten disulfide powder and the balance of iron powder are mixed to obtain mixed powder;

[0053] (2) applying a pressure of 800 MPa to the mixed powder obtained in step (1) to obtain a green body;

[0054] (3) Sintering the green body obtained in step (2) in a vacuum at a sintering temperature of 1180° C.;

[0055] (4) The green body obtained in step (3) is subjected to quenching treatment at a quenching temperature of 1000° C., and after quenching, tempering treatment is performed at a tempering temperature of 200° C. to obtain a steel-bonded hard alloy.

[0056] The steel-bonded cemented carbide prepared according to the above method was tested for performance, and the results are shown in Table 1.

Embodiment 2

[0058] (1) With 1.5wt% carbon powder, 0.8wt% silicon powder, 0.25wt% manganese powder, 13.0wt% chromium powder, 1.0wt% molybdenum powder, 0.5wt% nickel powder, 3.0wt% Titanium carbide powder, 2.0wt% tungsten disulfide powder and the rest of the iron powder are mixed to obtain a mixed powder;

[0059] (2) applying a pressure of 900 MPa to the mixed powder obtained in step (1) to obtain a green body;

[0060] (3) sintering the green body obtained in step (2) in a vacuum, and the sintering temperature is 1310° C.;

[0061] (4) The green body obtained in step (3) is subjected to quenching treatment at a quenching temperature of 800° C., and then tempered at a tempering temperature of 200° C. to obtain a steel-bonded hard alloy.

[0062] The steel-bonded cemented carbide prepared according to the above method was tested for performance, and the results are shown in Table 1.

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Abstract

The invention provides steel bonded hard alloy which comprises the following components: 1.5wt%-6.0wt% of refractory carbide, 1.0wt%-3.0wt% of WS2, 1.0wt%-3.0wt% of C, 0.1wt%-0.5wt% of Mn, 10.0wt%-18.0wt% of Cr, 1.0wt%-5.0wt% of Mo, more than 0 but less than or equal to 1.8wt% of Si, more than 0 but less than or equal to 5.0wt% of Ni, and the balance of Fe. The invention also provides a preparation method for the steel bonded hard alloy. The raw materials, such as refractory carbide, tungsten disulfide, carbon and chromium are added in the steel bonded hard alloy, and a powder metallurgy sintering technology and a thermal treatment technology are adopted, so that the strength and hardness of the steel bonded hard alloy are increased, the abrasive resistance of the steel bonded hard alloy is increased and the service life of a stirring shaft abrasion-resisting sleeve prepared from the steel bonded hard alloy is prolonged.

Description

technical field [0001] The invention relates to the field of metals, in particular to a steel-bonded hard alloy and a preparation method thereof. Background technique [0002] With the rapid development of science and technology and modern industry, the operating speed of mechanical equipment is getting higher and higher, and the speed of frictional parts is getting faster and faster, and its service life has become the main factor affecting production efficiency. Although material abrasion rarely causes catastrophic damage to metal workpieces, the resulting energy and material consumption is staggering. Therefore, the research and development of wear-resistant materials to reduce the wear of materials has received more and more attention. [0003] Wear-resistant materials are the core of the field of new materials, important basic materials for high-tech fields such as information technology, biotechnology and energy technology and national defense construction, and also p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44C22C38/56C22C38/60C22C33/02
Inventor 李智勇
Owner CHANGSHA WEISITAN METALLURGY PRODS
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