Method for preparing ceramic particle reinforced steel-based mesh material

A technology of ceramic particles and composite materials, applied in the field of metal matrix composite materials, can solve the problems of easy formation of slag inclusion, poor process controllability, unsuitable for large-scale industrial production, etc., and achieves shortened crystallization process, wide adaptability and wear resistance. The effect of organic unity of sex and resilience

Inactive Publication Date: 2012-06-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that it is easy to form slag inclusion defects, the process controllability is poor when used in actual production, and it is not suitable for large-scale industrial production

Method used

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  • Method for preparing ceramic particle reinforced steel-based mesh material
  • Method for preparing ceramic particle reinforced steel-based mesh material
  • Method for preparing ceramic particle reinforced steel-based mesh material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Use powder sintering to sinter alumina particles with a particle size of -20 to +30 mesh into strips;

[0028] (2) The strip blocks in step (1) are spliced ​​into corresponding network structures according to the shape of the working surface of the workpiece (in the case of local compounding), accounting for 50% of the volume fraction of the wear-resistant layer of the workpiece, using conventional sand casting, such as figure 2 After the high manganese steel is smelted to the pouring temperature, it is poured into the cavity 4 embedded with the network structure 3 through the pouring riser 5 in the middle of the sand mold 6, and cooled and solidified at room temperature. The ceramic particle reinforced steel-based mesh composite material composed of the wear-resistant layer 1 and the metal layer 2 of the high-manganese steel base material.

Embodiment 2

[0030] (1) Use powder sintering to sinter the mixture of ferromolybdenum powder and silicon carbide and tungsten carbide particles with a particle size of 60 meshes into a strip block; wherein, the alloy powder accounts for 20% of the volume of the strip block;

[0031] (2) After splicing and superimposing the strips in step (1), a net-like three-dimensional skeleton structure (in the case of overall composite) is formed. The spacing between each layer of strips is 3mm; conventional sand casting is used to melt gray cast iron HT300 After the material reaches a pouring temperature of 1530°C, it is poured into a cavity with a pre-embedded mesh three-dimensional skeleton structure, cooled and solidified at room temperature, and sand-cleaned to obtain a ceramic particle-reinforced steel-based mesh composite material.

Embodiment 3

[0033] (1) Use a binder to bond the mixture of tungsten iron powder and silicon nitride and titanium nitride particles with a particle size of 10 meshes into a strip block; wherein, the alloy powder accounts for 60% of the volume of the strip block;

[0034](2) The strip blocks in step (1) are spliced ​​into corresponding network structures according to the shape of the working surface of the workpiece (in the case of local compounding), accounting for 20% of the volume fraction of the wear-resistant layer of the workpiece, using conventional lost foam casting, melting After the gray cast iron reaches the pouring temperature, it is poured into a cavity with a pre-embedded network structure, cooled and solidified at room temperature, and cleaned of sand to obtain a ceramic particle reinforced steel-based network composite material.

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Abstract

The invention provides a method for preparing a ceramic particle reinforced steel-based mesh material, which comprises: forming a mixture of hard ceramic particles and alloy powder into strip blocks by powder sintering or by using and adhesive; joining the strip blocks into a corresponding mesh structure or joining and overlapping the strip blocks into mesh three-dimensional framework structure; and performing normal sand casting or lost foam casting, namely melting a substrate metal material, pouring the molten substrate metal material in a molding cavity, allowing the molten substrate metal material to cool and condense at room temperature, removing sand and obtaining the ceramic particle reinforced steel-based mesh material. The obtained ceramic particle reinforced steel-based mesh material gives full play to the high wear resistance of the ceramic particle hard phase and the toughness of the steel base; and the method with convenience for regulation and reliable process solves the problem of incomplete reaction of the composite material, nonuniform reinforcing phase particle distribution, pollution weakening on a reinforcing phase interface and the like and is used in wear resistance fields of mines, power, metallurgy, coal, building materials and the like.

Description

technical field [0001] The invention belongs to the technical field of metal-based composite materials, and in particular relates to a method for preparing ceramic particle-reinforced steel-based reticular composite materials. Background technique [0002] The development of modern industry has higher and higher requirements on the wear resistance of materials. Mining machinery, engineering machinery, agricultural machinery and various crushing and grinding machinery are used in metallurgy, mining, building materials, electric power, chemical industry, coal and agriculture. , The wearing parts of these mechanical equipment are subject to the wear and tear of various materials and grinding bodies such as sand, ore, soil, etc., and consume a large amount of metal every year. According to incomplete statistics, 1 / 3 to 1 / 2 of energy consumption is related to friction and wear. For materials, about 80% of the failures of parts are caused by wear, and about 50% of them fail due t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/14
Inventor 蒋业华隋育栋李祖来周荣岑启宏山泉
Owner KUNMING UNIV OF SCI & TECH
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