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Method for preparing heat-fatigue-resistance wear-resistance laminated particle reinforced composite material

A technology of particle reinforcement and composite materials, which is applied in the field of metal matrix composite materials, can solve the problems of being unsuitable for large-scale industrial production, easy to form slag inclusions, poor process controllability, etc., and achieve the convenience of large-scale industrial production, stable production quality, The effect of high overall performance

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

AI Technical Summary

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 heat-fatigue-resistance wear-resistance laminated particle reinforced composite material
  • Method for preparing heat-fatigue-resistance wear-resistance laminated particle reinforced composite material
  • Method for preparing heat-fatigue-resistance wear-resistance laminated particle reinforced composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Mix Ni6025WC powder with a particle size of 150 mesh with tungsten carbide particles with a particle size of -40~+60 mesh, add polyvinyl alcohol (PVA) to make a preformed block (such as figure 1 Award number 1), where the volume fraction of the nickel-based self-fluxing alloy powder in the prefabricated block is 15%; the volume fraction of the binder in the prefabricated block is 2%;

[0033] (2) Using conventional lost foam casting, using cutting methods according to the shape and structure of the wear-resistant parts, adopting a gasifiable hammer head foam model made of polystyrene (EPS), and coating the prefabricated blocks on the wear-resistant parts to withstand heat Circulate and wear surfaces, then melt alloy steel Cr15 high chromium steel to a pouring temperature of 1580°C, pour it into the cavity where the preform obtained in step (1) is placed, cool and solidify at room temperature, and clear the sand to obtain The wear-resistant layered particle reinforced co...

Embodiment 2

[0036] (1) Ni25A powder with a particle size of 180 mesh and silicon carbide and tungsten carbide particles with a particle size of 40 mesh are uniformly mixed, and polyvinyl alcohol (PVA) is added to form a prefabricated block. Among them, the nickel-based self-fluxing alloy powder accounts for the prefabricated block. The volume fraction of the prefabricated block is 10%; the volume fraction of the binder in the prefabricated block is 2%;

[0037] (2) Using conventional sand casting, pre-embed the prefabricated block in the hammer-head sand mold cavity made of resin sand according to the casting process requirements, and then smelt high carbon steel (ordinary carbon steel) to a pouring temperature of 1580 ℃, then put it Pouring into the cavity where the prefabricated block obtained in step (1) is placed, cooling and solidifying at room temperature, and after sand cleaning, a heat-resistant fatigue-resistant layered composite wear-resistant layer, metallurgical transition layer, ...

Embodiment 3

[0039] (1) Ni25B powder with a particle size of 200 meshes and silicon carbide and tungsten carbide particles with a particle size of 60 meshes are mixed uniformly, and polyvinyl alcohol (PVA) is added to form a prefabricated block. Among them, the nickel-based self-fluxing alloy powder accounts for the prefabricated block. The volume fraction of the binder is 15%; the volume fraction of the binder in the prefabricated block is 2%;

[0040] (2) Using conventional sand casting, pre-embed the prefabricated block in the hammerhead sand mold cavity made of sodium silicate sand according to the casting process requirements, and then smelt high carbon steel (ordinary carbon steel) to the pouring temperature, then pour it Put the prefabricated block obtained in step (1) into the cavity, cool and solidify at room temperature, and then clean the sand to obtain a wear-resistant layer composed of heat-resistant fatigue-resistant layered composite wear-resistant layer, metallurgical transitio...

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Abstract

The invention provides a method for preparing a heat-fatigue-resistance wear-resistance laminated particle reinforced composite material. The method prepares the wear-resistance laminated particle reinforced composite material consisting of a heat-fatigue-resistance laminated composite wear-resistance layer, a metallurgical transitional layer and a substrate metal layer by the following steps: mixing nickel-based self-melting alloy powder and hard ceramic particle uniformly, adding an adhesive, and forming a prefabricated block; and performing common sand mold coating or lost foam casting, namely melting a substrate metal material to a pouring temperature, pouring the molten substrate metal material into a molding cavity in which the prefabricated block is placed, allowing the molten substrate metal material to cool and condense at room temperature, and removing sand. The combined preparation process disclosed by the invention has the characteristics of high controllability, simple operation, high yield, high overall performance and stable production quality; and the heat-fatigue-resistance laminated composite wear-resistance layer and the substrate metal layer are metallurgically combined, and the composite material can be used in heat-fatigue-resistance and wear-resistance fields of mines, power, metallurgy, coal, building materials and the like. The method is suitable for industrial large-scale production.

Description

[0001] Technical field [0002] The invention belongs to the technical field of metal matrix composite materials, and particularly relates to a method for preparing a heat-resistant fatigue-resistant layered particle reinforced composite material. Background technique [0003] The development of modern industry requires higher and higher wear resistance of materials. Mining machinery, engineering machinery, agricultural machinery and various crushing and grinding machinery are used in the metallurgy, mining, building materials, electric power, chemical, coal and agricultural sectors. , The vulnerable parts of these machinery and equipment are subject to the abrasion of various materials such as sand, ore, soil and grinding bodies, and consume a lot 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, of which about 50% fail due to abrasive we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/08B22D19/14
Inventor 蒋业华李祖来隋育栋周荣岑启宏山泉
Owner KUNMING UNIV OF SCI & TECH
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