Multi-scale ceramic/metal composite abrasion-resistant material and preparation method thereof

A metal composite, wear-resistant material technology, used in mechanical equipment, heat exchange equipment, belts/chains/gears, etc., can solve the problems of high wear resistance not being fully exerted, restrictions, ceramic broken and falling off, etc. Obvious demonstration and driving effect, achieve sustainable development, avoid large peeling effect

Active Publication Date: 2013-12-11
LIAONING ZHUOYI NEW MATERIAL
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AI Technical Summary

Problems solved by technology

For layered composite structure wear-resistant steel, the significant difference in expansion coefficient and plasticity between the inner high-strength and toughness structural steel and the outer layer of high-strength wear-resistant steel often leads to cracks in the outer layer of high-strength wear-resistant steel during preparation and use, which aggravates wear , so that its advantages of high wear resistance have not been well utilized
For wear-resistant steel with inlaid composite structure, columnar, spherical ceramics or cemented carbide embedded in high-toughness steel have strong wear resistance, which can significantly improve the wear resistance of the material, but there are still many problems in terms of preparation, use and cost. Facing a series of problems that limit its popularization and application
When cemented carbide is used as the wear-resistant basic element, due to the high price of the cemented carbide itself, and the reliable combination of the cemented carbide and the metal substrate often requires the use of brazing methods, large-scale promotion and application will be subject to high cost pressures. limit
When ceramic wear-resistant elements are used, how to ensure the reliable combination of ceramics and steel without excessive internal stress during the composite process, and how to prevent ceramics from breaking and falling off during use have not been well resolved so far.

Method used

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  • Multi-scale ceramic/metal composite abrasion-resistant material and preparation method thereof
  • Multi-scale ceramic/metal composite abrasion-resistant material and preparation method thereof
  • Multi-scale ceramic/metal composite abrasion-resistant material and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0051] The performance test results show that the multi-scale composite wear-resistant steel composed of foamed silicon carbide ceramics / cast iron (cast steel) / high toughness steel has a compressive strength of more than 650MPa and an impact toughness of more than 50J / cm 2 , the wear resistance is 7 times that of high chromium cast iron, which shows the advantage of realizing the ideal combination of high wear resistance and high strength and toughness of the material, as shown in Figure 1(a)-(b). The present invention also provides a preparation method for a multi-scale ceramic / metal composite wear-resistant material, the preparation process is as follows figure 2 As shown, it mainly includes: preparation of foam ceramic block, manufacture of high toughness constraining frame, inlay of foam ceramic block, preheating, metal smelting, compounding, machining and finishing, etc., to form a multi-scale ceramic / metal composite wear-resistant material.

[0052] The preparation proce...

Embodiment 1

[0098] ① High toughness steel constrained frame casting

[0099] The precision casting method is used to cast a 35# steel constraint frame, and the bottom surface of the constraint frame 1 is opened: the upper dimension is The following dimensions are Inverted taper holes 2, evenly distributed on the surface 21×21×20mm 3 The square hole 3, the width of the middle transverse rib 4 is 3mm, as shown in Figure 3. Then use the sandblasting method to roughen the inner surface of the constraint frame.

[0100] ② Preparation of foamed silicon carbide ceramic block

[0101] According to the patent: A high-strength silicon carbide foam ceramics and its preparation method (ZL00110479.9), a silicon carbide foam ceramic block is prepared. The average size of the mesh is: 1.0mm, the volume fraction is: 60%, and the average grain size is in 5μm, size 21×21×20mm 3 , the ceramic foam blocks are treated at high temperature to remove residual silicon, such as Figure 4 shown.

[0102]...

Embodiment 2

[0116] The difference from Example 1 lies in the preparation of the high-toughness steel confinement frame.

[0117] The precision casting method is used to cast a 16 manganese steel constraint frame. Then use the sandblasting method to roughen the inner surface of the constraint frame.

[0118] In this example, the three phases of foamed silicon carbide ceramic / ductile iron / 16 manganese steel constitute a multi-scale composite wear-resistant steel, which shows the advantage of realizing the ideal combination of high wear resistance and high strength and toughness of the material.

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Abstract

The invention relates to a preparation technology of a high-performance and abrasion-resistant material, in particular to a multi-scale ceramic / metal composite abrasion-resistant material and a preparation method thereof. The resource-saving high-performance and abrasion-resistant material is obtained by using a high-performance foamed ceramic / metal double continuous phase composite material as an abrasion-resistant matrix, using a high-toughness metal as a constraint framework and using a casting method. The abrasion-resistant material has multi-scale composite structural characteristics, the abrasion-resistant unit is compounded in micron and millimeter scales, and the abrasion-resistant unit and the constraint framework are compounded in a centimeter scale. The structure can well realize reasonable matching of high abrasion resistance and high strength and toughness of the material, the abrasion resistance and the impact toughness of the material are respectively over 7 times and 10 times those of high-chromium cast iron, and meanwhile, scarce alloy elements (Cr, Ni, Mo and the like) are not used. The material is applied to large engineering equipment of crushing, excavating, transporting and the like, is excellent in abrasion resistance, low in cost and convenient to use, greatly prolongs the service life, greatly improves the production efficiency, and has good social benefit and economic benefit.

Description

technical field [0001] The invention relates to a preparation technology of a high-performance wear-resistant material, in particular to a multi-scale ceramic / metal composite wear-resistant material and a preparation method thereof. Background technique [0002] Wear is one of the main forms of workpiece failure, resulting in a large consumption of energy and raw materials. According to incomplete statistics, it consumes about 3% of steel and 20-30% of energy in industrial countries in the world on average every year. The average annual consumption of wear-resistant steel in my country is about 3-4 million tons, with a value of more than 60 billion yuan. As an effective means of reducing wear and tear, wear-resistant steel is widely used in energy, building materials, metallurgy, mining, transportation, equipment manufacturing, environmental protection and national defense and other fields. For example, grinding rollers, grinding discs, balls and liners of ball mills, buck...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/00
Inventor 张劲松曹小明杨振明田冲金鹏全锋厚马得举付超
Owner LIAONING ZHUOYI NEW MATERIAL
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