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A tic-based cemented carbide grid composite reinforced grinding roller

A cemented carbide and composite reinforcement technology is applied in the field of TiC-based cemented carbide mesh composite reinforcement grinding rolls, which can solve the problems of poor wear resistance and fracture, and achieve the effect of reducing cost, simple process and not easy to disperse.

Active Publication Date: 2016-06-08
NANTONG GAOXIN ANTIWEAR MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this kind of grinding roller has poor wear resistance in the low alloy steel area of ​​the grinding roller surface during the grinding process, and the hard alloy block will protrude on the surface of the roller body, and will break when it is impacted and squeezed by coal gangue

Method used

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  • A tic-based cemented carbide grid composite reinforced grinding roller
  • A tic-based cemented carbide grid composite reinforced grinding roller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Mix the TiC-based cemented carbide material with a particle size of 60 mesh and the binder to obtain a mixture, wherein the mass content of each component is: TiC: 50%, Mn: 5%, Ni: 1%, Mo: 0.6 %, Cr: 2%, the balance is iron powder, binder: 1%;

[0023] (2) Fill the above-mentioned mixture into the cavity of the grid mold of the press. The pressure of the press on the mixture is 50MPa, and it is molded and demolded. Then, the grid preform is placed in a vacuum furnace with a temperature of 1150°C and a vacuum degree of After sintering and heat preservation at 0.2Pa for 120 minutes, the TiC-based cemented carbide grid prefabricated part was obtained after cooling out of the furnace;

[0024] (3) After sandblasting and preheating the above-mentioned prefabricated parts, they are uniformly fixed on the surface of the grinding roller casting cavity in the circumferential direction. After the mold is closed, the molten material of the roller body is poured into the castin...

Embodiment 2

[0026] (1) Mix the TiC-based cemented carbide material with a particle size of 200 mesh and the binder to obtain a mixture, wherein the mass content of each component is: TiC: 70%, Mn: 7%, Ni: 2%, Mo: 1.5 %, Cr: 4%, the balance is iron powder, binder: 6%;

[0027] (2) Fill the above-mentioned mixture into the cavity of the grid mold of the press. The pressure of the press on the mixture is 70MPa, and it is molded and demolded. Then, the grid prefabricated blank is placed in a vacuum furnace with a temperature of 1450°C and a vacuum degree of After sintering and heat preservation at 0.4Pa for 180 minutes, the TiC-based cemented carbide grid prefabricated part was obtained after cooling out of the furnace;

[0028] (3) After sandblasting and preheating the above-mentioned prefabricated parts, they are uniformly fixed on the surface of the grinding roller casting cavity in the circumferential direction. After the mold is closed, the molten material of the roller body is poured in...

Embodiment 3

[0030] (1) Mix the TiC-based cemented carbide material with a particle size of 100 mesh and the binder to obtain a mixture, wherein the mass content of each component is: TiC: 60%, Mn: 6%, Ni: 1.5%, Mo: 1.0 %, Cr: 3%, the balance is iron powder, binder: 3%;

[0031] (2) Fill the above-mentioned mixture into the cavity of the grid mold of the press. The pressure of the press on the mixture is 60 MPa, and it is molded and demolded. Then, the grid prefabricated blank is placed in a vacuum furnace with a temperature of 1300 ° C and a vacuum degree of After sintering and heat preservation at 0.3 Pa for 150 minutes, the TiC-based cemented carbide grid prefabricated part was obtained after cooling out of the furnace;

[0032] (3) After sandblasting and preheating the above-mentioned prefabricated parts, they are uniformly fixed on the surface of the grinding roller casting cavity in the circumferential direction. After the mold is closed, the molten material of the roller body is pou...

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Abstract

The invention discloses a TiC-based cemented carbide grid composite reinforced grinding roller, which comprises the following steps: uniformly mixing a TiC-based cemented carbide material and a binder to obtain a mixture; filling the above-mentioned mixture in a grid mold cavity of a press Inside, the mixture is subjected to a press pressure of 50-70MPa, molded and demolded, and then the grid prefabricated blank is placed in a vacuum furnace for sintering and heat preservation, and then cooled to obtain a TiC-based cemented carbide grid prefabricated part; sandblasting After processing and preheating, it is uniformly fixed on the surface of the grinding roller casting mold cavity in the circumferential direction. After the mold is closed, the molten material of the roller body is poured into the casting mold cavity, and the finished product is obtained after cooling. The prefabricated parts pressed by the press in the present invention have high density, are not easy to break up during pouring, and can be made into prefabricated parts of various required shapes, and can be applied to different types of grinding rollers; Compared with other techniques, this technique is simpler and more convenient.

Description

technical field [0001] The invention specifically relates to a TiC-based cemented carbide grid composite reinforced grinding roller, which is especially suitable for grinding rollers of various vertical mills in industries such as electric power, cement, metallurgy, and mining. Background technique [0002] In industries such as electric power, cement, metallurgy, and mining, a large number of grinding rollers are used in the pulverizing system. As the main wear-resistant part, its quality, especially the wear resistance, directly affects the operation rate of pulverizing, pulverized coal Quality, roll consumption and production costs. Due to any grinding roller material, there is serious wear and tear under the working conditions of milling. The grinding roller can still work normally within a certain wear range. When the wear reaches a certain limit, it will be scrapped if the outer circle is too small. . At present, the grinding rollers used in thermal power plants are ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/16B22D19/02C22C29/10
Inventor 钱兵孙书刚
Owner NANTONG GAOXIN ANTIWEAR MATERIALS TECH CO LTD