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WC-Fe-Ni-Co-Cr cemented carbide roll collar with low cost and high performance

A cemented carbide, high-performance technology, applied in the field of low-cost and high-performance WC-Fe-Ni-Co-Cr cemented carbide roll rings, can solve the problems of poor performance, low life, high cost of cemented carbide roll rings, etc. Achieve the effect of reducing production costs and saving cobalt resources

Active Publication Date: 2017-02-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a lower cost, better performance and longer service life than the existing hard alloy roll rings, aiming at the characteristics of high cost, poor performance and low service life of the existing hard alloy roll rings. A low-cost high-performance WC-Fe-Ni-Co-Cr cemented carbide roll ring to meet the rolling requirements of high-speed wire

Method used

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  • WC-Fe-Ni-Co-Cr cemented carbide roll collar with low cost and high performance
  • WC-Fe-Ni-Co-Cr cemented carbide roll collar with low cost and high performance
  • WC-Fe-Ni-Co-Cr cemented carbide roll collar with low cost and high performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A low-cost and high-performance WC-Fe-Ni-Co-Cr cemented carbide roll ring, the proportion of Fe in the binder is controlled at 42.5wt.%. The specific alloy composition is: 80wt.% WC powder (average grain size 6-15μm), 8.5wt.% Fe powder (0.5-2.0μm particle size), 8.2wt.% Ni powder (0.5-2.0μm particle size ), 2.7 wt.% Co powder (particle size 1.0-2.0μm), 0.6wt.% Cr powder (particle size 1.0-2.0μm). The above powder is ball milled and mixed according to the requirements, using YG8 cemented carbide balls with a diameter of 6~12mm as the grinding body, the mass ratio of the ball to material is 4:1, using gasoline as the ball milling medium, and adding 200~ Add in a proportion of 400ml, the ball milling speed is 60~250rpm, ball mill on a roller ball mill for 16h, after ball milling and mixing, the slurry is dried at 80°C in a vacuum environment for 4h. Add 0.8wt.% synthetic rubber as a molding agent, press it into a cemented carbide roller ring compact under a pressure of 12...

Embodiment 2

[0033]A low-cost and high-performance WC-Fe-Ni-Co-Cr cemented carbide roller ring, the proportion of Fe in the binder is controlled at 57.5wt.%. The specific alloy composition is: 80wt.% WC powder (average grain size 6-15μm), 11.5wt.% Fe powder (particle size 0.5-2.0μm), 5.9wt.% Ni powder (particle size 0.5-2.0μm) ), 2.1 wt.% Co powder (1.0-2.0μm particle size), 0.5wt.% Cr powder (1.0-2.0μm particle size). The above powder is ball milled and mixed according to the requirements, using YG8 cemented carbide balls with a diameter of 6~12mm as the grinding body, the mass ratio of the ball to material is 4:1, gasoline is used as the ball milling medium, and 200~ Add in a proportion of 400ml, the ball milling speed is 60~250rpm, ball mill on a roller ball mill for 16h, after ball milling and mixing, the slurry is dried at 80°C in a vacuum environment for 4h. Add 0.8wt.% synthetic rubber as a molding agent, press it into a cemented carbide roller ring compact under a pressure of 120M...

Embodiment 3

[0035] A low-cost and high-performance WC-Fe-Ni-Co-Cr cemented carbide roll ring, the proportion of Fe in the binder is controlled at 71.5wt.%. The specific alloy composition is: 80wt.% WC powder (average grain size 6-15μm), 14.3wt.% Fe powder (particle size 0.5-2.0μm), 3.2wt.% Ni powder (particle size 0.5-2.0μm) ), 1.2 wt.% Co powder (1.0-2.0μm particle size), 0.6wt.% Cr powder (1.0-2.0μm particle size). The above powder is ball milled and mixed according to the requirements, using YG8 cemented carbide balls with a diameter of 6~12mm as the grinding body, the mass ratio of the ball to material is 4:1, gasoline is used as the ball milling medium, and 200~ Add in a proportion of 400ml, the ball milling speed is 60~250rpm, ball mill on a roller ball mill for 16h, after ball milling and mixing, the slurry is dried at 80°C in a vacuum environment for 4h. Add 0.8wt.% synthetic rubber as a molding agent, press it into a cemented carbide roller ring compact under a pressure of 120MP...

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Abstract

The invention discloses a WC-Fe-Ni-Co-Cr hard alloy roll collar with low cost and high performance, and alloy components include 70 to 92wt.% of WC, 3.2 to 24wt.% of Fe, 3 to 12wt.% of Ni, 1 to 9wt.% of Co and 0.2 to 1.0wt.% of Cr. When an alloy binder contains 26 to 44.2wt.% of Fe and 10 to 30wt.% of Co, austenite is prepared; when the alloy binder contains 44.2 to 58.7wt.% of Fe and 10 to 30wt.% of Co, austenite and martensite are prepared; and when the alloy binder contains 58.7 to 79.4wt.% Fe and 10 to 30wt.% of Co, martensite is prepared. According to the WC-Fe-Ni-Co-Cr hard alloy roll collar, the Fe and Co contents of the alloy binder are adjusted, so that the quantity and shape of austenite and martensite in the binder are changed, and the high-performance hard alloy roll collar which has the advantages of low cost, long service life and high intensity, toughness and abrasion resistance is prepared.

Description

technical field [0001] The invention relates to a cemented carbide roller ring, in particular to a low-cost and high-performance WC-Fe-Ni-Co-Cr cemented carbide roller ring. Background technique [0002] With the rapid development of my country's steel rolling industry, the requirements for the quality and precision of roll rings are also increasing. The traditional high-chromium iron, high-chromium steel and high-speed steel roll rings can no longer meet the rapid development of the steel industry. Tungsten carbide roller ring has the characteristics of high hardness, good wear resistance, high mechanical strength, good impact resistance, high elastic modulus, small linear expansion coefficient, good corrosion resistance and high temperature oxidation resistance. The hardness of cemented carbide roller ring at room temperature is 78~94HRA, and it has good rigidity at room temperature without obvious plastic deformation. Its Young's modulus is 2~3 times that of steel, and it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05C22C1/10B22F3/02B22F3/10
CPCB22F3/02B22F3/10C22C1/051C22C29/067C22C29/08
Inventor 罗兵辉高阳赵勇柏振海
Owner CENT SOUTH UNIV
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