Lost foam casting type composite wear-resistant component and casting method thereof

A technology of composite wear-resistant parts and lost foam casting, applied in the field of lining plates and roller sleeves, can solve the problems of insufficient strength of prefabricated bodies, long production cycle, low yield of finished products, etc., to save costs, increase efficiency, environmental pollution, production The effect of short cycle and high yield

Active Publication Date: 2013-07-17
BEIJING POWER EQUIP GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is relatively complicated. In the process of prefabricated body production, affected by high temperature or high pressure process, the prefabricated body cannot reach the required strength, resulting in breakage during demoulding or handling, and the impregnation between the molten metal and the prefabricated body The effect is closely related to the prefabricated body preparation process, especially affected by the casting pressure during casting, all of which lead to a long production cycle and low yield of the process

Method used

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  • Lost foam casting type composite wear-resistant component and casting method thereof
  • Lost foam casting type composite wear-resistant component and casting method thereof
  • Lost foam casting type composite wear-resistant component and casting method thereof

Examples

Experimental program
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Effect test

Embodiment approach

[0045] As another preferred embodiment, the composite wear-resistant member is a lining plate or a roller sleeve of a coal mill.

[0046] The preferred modes of the above composite wear parts can be freely combined.

[0047] The lost foam used for casting the above-mentioned composite wear parts, its shape is consistent with the shape of the finished wear parts, including the lost foam matrix with a concave part and a plurality of lost foam columns evenly arranged in the concave part, each lost foam column is There is a certain gap in between.

[0048] As a preferred embodiment, the specifications of the lost foam columns are φ30mm×height 35mm or φ28mm×height 30mm, the lost foam columns are vertically arranged in the concave portion, and the gaps between the lost foam columns are filled with reinforcing particles. The required vacancies, more preferably, the percentage of the total volume of the voids between the lost foam pillars to the total volume of the concave portion is...

Embodiment 1

[0051] Example 1 Lost Foam Casting Composite Wear-Resistant Ceramic Liner 1, Lost Foam 100 for Casting Liner 1 and Casting Method for Liner 1

[0052] In this example, the composite wear-resistant ceramic lining plate 1 for the ZGM medium-speed coal mill is prepared: the structure of the cast lining plate 1 is shown in figure 1 and figure 2 , which is composed of a metal base part 11 with a concave part, and a ceramic working layer part 12 which is integrally cast with the metal base part 11 and filled in the concave part. The working layer part is uniformly distributed with ceramic particles 121. The ceramic particles 121 are fixed on the ceramic working layer part 12 by the solidification of the molten metal flowing around the ceramic particles 121 during the integral casting.

[0053] The material of the ceramic particles is zirconia toughened aluminum oxide (wherein, the content of zirconia is 46-60 (weight)%, and the content of aluminum oxide is 40-54 (weight)%; 1.2mm,...

Embodiment 2

[0062] Example 2 Lost foam casting composite wear-resistant ceramic roll cover 2, lost foam 200 for casting roll cover 2 and casting method of roll cover 2

[0063] Lost foam casting composite wear-resistant ceramic roll sleeve 2: see Figure 5 (finished roll sleeve) and Image 6 (The internal structure of one of the ceramic working layers after the surface of the finished roller sleeve is polished), which consists of a metal base part 21 with a plurality of concave parts on the surface, and a plurality of metal base parts 21 integrally cast with the metal base part 21 and filled in the plurality of concave parts. Each ceramic working layer is composed of 22 ceramic working layers. Ceramic particles 221 are evenly distributed in each ceramic working layer. The ceramic particles 221 are fixed on each ceramic working layer by being wrapped and solidified by the molten metal flowing around the ceramic particles 221 during the integral casting. Layer portion 22 .

[0064] The ma...

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Abstract

The invention discloses a lost foam casting type composite wear-resistant component and a casting method of the lost foam casting type composite wear-resistant component. The wear-resistant component comprises a metallic substrate part and a working layer part, wherein the metallic substrate part is provided with concave part; the working layer part, the metallic substrate part are cast into a whole and the working layer part is filled into the concave part; reinforced particles are uniformly distributed on the working layer part; and the reinforced particles are wrapped with molten metal which flows around the reinforced particles during integrated casting and then is solidified, so as to be fixed on the working layer part. The composite wear-resistant component has wear-resistant and self-protective effects, and is capable of preventing possible cracks from expanding in a ceramic working layer; therefore, the wear resistance is improved, and the service life is prolonged. Compared with cast-in type reinforced particles, the reinforced particles disclosed by the invention have higher yield, are hardly influenced by the casting temperature and speed; simultaneously, the reinforced particles are distributed more uniform in the metal substrate; in addition, the casting method is simple to operate, short in production period and low in cost, and materials can be saved.

Description

technical field [0001] The invention relates to a lost foam casting composite wear-resistant part and a casting method thereof. The composite wear-resistant part is particularly suitable for the lining plate and the roller sleeve of a coal mill. Background technique [0002] The lost foam casting method is also called the real casting method. Usually, the lost model formed by polystyrene foam or wax is embedded in the sand casting mold, and then molten metal is poured, and the lost model is vaporized and disappeared by the heat of the molten metal. At the same time, the molten metal is filled in the voids generated by the vaporization of the lost model to manufacture the casting method. This method has been widely used in the production of stamping dies. [0003] Over the past century, metal wear-resistant materials have played their respective roles in different fields, from manganese steel, nickel-hard cast iron to high-chromium cast iron, and surface surfacing materials. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04
Inventor 张顺利王玉磊王嵩聂县会李勇
Owner BEIJING POWER EQUIP GRP
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