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Wear-resistant block with controllable shrinkage rate of metal matrix, its preparation device, method and application

A technology of metal matrix and shrinkage rate, which is applied in the field of wear-resistant equipment, can solve the problems affecting the comprehensive mechanical properties of wear-resistant blocks and the difficulty of achieving a high density of metal matrix, and achieve the effects of short heating time, high production efficiency and fast speed

Active Publication Date: 2022-05-20
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is because the sintered body contains a large number of large particles on the order of millimeters, and it is difficult to achieve a high density of the metal matrix simply by shrinkage caused by its own liquid phase solidification, which seriously affects the comprehensive mechanical properties of the wear-resistant block.

Method used

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  • Wear-resistant block with controllable shrinkage rate of metal matrix, its preparation device, method and application
  • Wear-resistant block with controllable shrinkage rate of metal matrix, its preparation device, method and application
  • Wear-resistant block with controllable shrinkage rate of metal matrix, its preparation device, method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A wear-resistant block with a controllable shrinkage rate of a metal matrix is ​​a wear-resistant block with a controllable shrinkage rate of a large-particle oxide metal matrix. It is a wear-resistant material and can be used for a cermet vertical mill roller sleeve;

[0064] The preparation device of the wear-resistant block with controllable shrinkage rate of the metal matrix used in this embodiment is an intermediate frequency induction heating machine, and its structural diagram is shown in figure 1 , including an insulating bracket 9, an induction coil 6 is arranged inside the insulating bracket 9, a circulating water cooling chamber 7 is provided between the induction coil 6 and the insulating bracket 9, and the circulating water cooling chamber 7 is provided with a water inlet 8 and a water outlet 10, The cooling medium is circulating water, the crucible 4 is arranged inside the cavity formed by the induction coil 6, the crucible lining 5 is arranged between the ...

Embodiment 2

[0103] A wear-resistant block with a controllable shrinkage rate of the metal matrix, the preparation device used is the same as that in Example 1.

[0104] The preparation method of a wear-resistant block with a controllable shrinkage rate of the metal matrix in this embodiment specifically includes the following steps:

[0105] Step 1, raw material preparation of wear-resistant block with controllable metal matrix shrinkage rate:

[0106] Prepare a metal matrix and a reinforcement phase; wherein, the metal matrix is ​​a high-chromium cast iron alloy powder, and the chemical components contained in the high-chromium cast iron alloy powder and the mass percentages of each component are: C: 2.0%, Si: 0.1%, Mn: 2 %, Cr: 30%, Mo: 0%, the balance is Fe and unavoidable impurities; the reinforcing phase is ceramic reinforcing particles;

[0107] According to the volume ratio, ceramic reinforcing particles: high chromium cast iron alloy powder = 1:3; the ceramic reinforcing particles ...

Embodiment 3

[0138] A wear-resistant block with a controllable shrinkage rate of the metal matrix, the preparation device used is the same as that in Example 1.

[0139] The preparation method of a wear-resistant block with a controllable shrinkage rate of the metal matrix in this embodiment specifically includes the following steps:

[0140] Step 1, raw material preparation of wear-resistant block with controllable metal matrix shrinkage rate:

[0141] Prepare a metal matrix and a reinforcing phase; wherein, the metal matrix is ​​a high-chromium cast iron alloy powder, and the chemical components contained in the high-chromium cast iron alloy powder and the mass percentages of each component are: C: 3.0%, Si: 1%, Mn: 0.1 %, Cr: 16%, Mo: 3%, the balance is Fe and unavoidable impurities; the reinforcing phase is ceramic reinforcing particles;

[0142] According to the volume ratio, ceramic reinforcing particles: high chromium cast iron alloy powder = 1:3; the ceramic reinforcing particles ...

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Abstract

A wear-resistant block with a controllable shrinkage rate of a metal matrix, a preparation device, a method and application thereof, belong to the field of wear-resistant equipment. The manufacturing method of the wear-resistant block with controllable shrinkage rate of the metal matrix is ​​as follows: according to the raw materials, prepare the materials and mix them; put the mixed materials into the crucible, compact the mixed materials, and then heat the crucible filled with the materials by medium frequency induction To 1200-1500 ℃, heat and press down the material, the depth of the material down is calculated according to the theoretical shrinkage of the metal matrix, and the shrinkage of the metal matrix is ​​indirectly controlled by using the program to control the pressing depth of the hydraulic device. The wear-resistant block with a controllable shrinkage rate of the metal matrix is ​​used for wear-resistant roller sleeves or blow bars, and has excellent wear resistance. The production efficiency is high by adopting the preparation method of the wear-resistant block, and the shrinkage rate of the metal matrix can be indirectly controlled through the pressing depth of the hydraulic device, which is energy-saving and environment-friendly.

Description

technical field [0001] The invention belongs to the field of wear-resistant equipment, and in particular relates to a wear-resistant block with a controllable shrinkage rate of a metal matrix, a preparation device, a method and application thereof. Background technique [0002] Metal-ceramic composite materials are known as wear-resistant materials in the 21st century, which have the advantages of plasticity and toughness of metals and high strength and rigidity of ceramics. Vertical mill is an ideal large-scale grinding equipment, which is widely used in cement, electric power, metallurgy, chemical industry, non-metallic minerals and other industries. It integrates crushing, drying, grinding, grading and conveying, and has high production efficiency. It can grind block, granular and powder raw materials into required powder materials. Roller sleeves are the core components of vertical mills. In the domestic market, there are mainly three types of high-chromium cast iron we...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/14B22F1/12C22C37/10C22C37/06C22C37/08C21D1/18B02C4/30B02C13/28
CPCB22F3/003B22F3/14C22C37/10C22C37/06C22C37/08C21D1/18B02C4/305B02C13/28Y02P20/10
Inventor 佟伟平高菁李铁帅
Owner NORTHEASTERN UNIV LIAONING