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Method for manufacturing TiC hard alloy composite grinding roller

A cemented carbide and composite grinding roller technology, applied in the field of various vertical grinding rollers, can solve problems such as poor wear resistance and fracture, and achieve the effects of wide application range, cost reduction and high density

Active Publication Date: 2014-11-19
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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  • Method for manufacturing TiC hard alloy composite grinding roller
  • Method for manufacturing TiC hard alloy composite grinding roller
  • Method for manufacturing TiC hard alloy composite grinding roller

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of a TiC cemented carbide composite grinding roller, characterized in that: comprising the steps of:

[0028] (1) Mix TiC cemented carbide material with a particle size of 60-200 mesh and a binder to obtain a mixture, wherein the mass content of each component is: titanium carbide: 50%, Mn: 7%, Ni: 2%, Mo : 1.5%, Cr: 4%, the balance is iron, binder: 6%;

[0029] (2) Fill the above mixture into the mold cavity of the press, the pressure of the press on the mixture is 50MPa, molding and demoulding, and then put the preform into the vacuum furnace with a temperature of 1450°C and a vacuum degree of 0.2-0.4Pa After lower sintering and heat preservation for 180 minutes, the TiC cemented carbide prefabricated parts (such as figure 1 shown);

[0030] (3) After sandblasting and preheating the prefabricated parts, fix them on the end face of the casting mold cavity of the liner plate. After closing the mold, pour the iron-based self-fluxing alloy melt ...

Embodiment 2

[0033] A preparation method of a TiC cemented carbide composite grinding roller, characterized in that: comprising the steps of:

[0034] (1) Mix TiC cemented carbide material with a particle size of 60-200 mesh and a binder to obtain a mixture, wherein the mass content of each component is: titanium carbide: 70%, Mn: 5%, Ni: 1%, Mo : 0.6%, Cr: 2%, the balance is iron, binder: 1%;

[0035] (2) Fill the above mixture into the cavity of the press mold, the mixture is subjected to a press pressure of 70MPa, molded and demolded, and then the preform is placed in a vacuum furnace with a temperature of 1350°C and a vacuum degree of 0.2-0.4Pa After lower sintering and heat preservation for 120 minutes, the TiC cemented carbide prefabricated part is obtained after cooling out of the furnace;

[0036] (3) After sandblasting and preheating the prefabricated parts, fix them on the end face of the casting mold cavity of the liner plate. After closing the mold, pour the nickel-based se...

Embodiment 3

[0039] A preparation method of a TiC cemented carbide composite grinding roller, characterized in that: comprising the steps of:

[0040] (1) Mix TiC cemented carbide material with a particle size of 60-200 mesh and a binder to obtain a mixture, wherein the mass content of each component is: titanium carbide: 60%, Mn: 6%, Ni: 1.5%, Mo : 1%, Cr: 3%, the balance is iron, binder: 1%;

[0041] (2) Fill the above-mentioned mixture into the mold cavity of the press, the pressure of the press on the mixture is 60MPa, molding and demoulding, and then put the preform into the vacuum furnace with a temperature of 1150°C and a vacuum degree of 0.2-0.4Pa After lower sintering and heat preservation for 150 minutes, the TiC cemented carbide prefabricated part is obtained by cooling out of the furnace;

[0042] (3) After sandblasting and preheating the prefabricated parts, fix them on the end face of the casting mold cavity of the lining plate. After closing the mold, pour the high chromium...

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Abstract

The invention discloses a method for manufacturing a TiC hard alloy composite grinding roller. The method includes the following steps that TiC hard alloy material and binder are evenly mixed to obtain a mixture; a cavity of a die of a press is filled with the mixture for forming, the die is released, and after the mixture is sintered, cooled and taken out of the furnace, TiC hard alloy prefabricated members are obtained; the prefabricated members are sand-blasted and preheated, the die is assembled, molten abrasion-resistant alloy is poured into a casting cavity, and composite abrasion-resistant liner plates with the surface of the abrasion-resistant alloy and the surface of the TiC hard alloy metallurgically bonded are obtained after cooling is performed; after being preheated, the composite abrasion-resistant liner plates are evenly distributed on and fixed to the surface of the grinding roller casting cavity in the circumferential direction, after the die is assembled, molten matrix material is poured into the casting cavity, and the TiC hard alloy composite grinding roller is obtained after cooling is performed. The composite grinding roller matrix material is good in tenacity; a dovetail type structure is adopted for the composite abrasion-resistant liner plates so that the composite abrasion-resistant liner plates can be firmly combined with the matrix, and thus not only can good tenacity of the matrix of the grinding roller guaranteed, but also high abrasion resistance of the composite liner plates can be guaranteed.

Description

[0001] technical field [0002] The invention relates to a TiC cemented carbide composite grinding roller and a preparation method thereof, and is particularly suitable for grinding rollers of various vertical mills in industries such as electric power, cement, metallurgy, and mining. Background technique [0003] 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 plan...

Claims

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Application Information

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IPC IPC(8): B22F7/04
Inventor 钱兵孙书刚
Owner NANTONG GAOXIN ANTIWEAR MATERIALS TECH CO LTD
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