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Grinder hammerhead with ceramic wearing coat and casting method thereof

A ceramic wear-resistant layer and crusher technology, which is applied in casting molding equipment, grain processing, etc., can solve the problems of poor material strength and toughness, easy to break, complex process, etc., achieve good metallurgical bonding, not easy to wear and break , the effect of reducing the cost of use

Inactive Publication Date: 2008-12-03
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through a large number of follow-up investigations on the wear-resistant material industry, it is found that the common problems of hammer heads made of wear-resistant steel materials are: the service life of high manganese steel hammer heads is short; Poor abrasiveness; nickel-hard cast iron and high-chromium cast iron have high hardness and good wear resistance, but the strength and toughness of the material are poor, and they are prone to fracture under the action of crushing impact force; mechanical assembly, bonding compounding and metallurgical compounding are used. The cast iron hammer head produced by the method is effective in use, but there are disadvantages such as complicated process and high cost
At present, it is difficult for the hammer head made of various wear-resistant materials to achieve the comprehensive performance of high hardness and wear resistance, good strength and toughness.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0007] Example 1: The hammer head is composed of a composite layer on the surface of the matrix. The matrix material is high boron cast steel. The mass fraction of its chemical composition is as follows: C0.21%, B1.4%, Si1.1%, Mn0. 91%, Cu0.85%, Cr1.2%, Ti0.085%, V0.14%, N0.074%, RE0.21%, S0.032%, P0.041%, Fe93.74%; composite layer It is a composite layer of ceramic particles, and the volume fraction of its components is: 40 mesh WC 20%, 60 mesh ferrochrome powder 10%, PVA binder 4%, borax 2%, Eps microbeads 64%.

[0008] The casting method of the present invention is a shape casting method combining lost foam casting and casting infiltration casting, which adopts negative pressure to infiltrate high-temperature molten steel into the composite layer and form a metallurgical bond; wherein, the pretreatment process of high boron cast steel is: Ordinary steel scrap, ferrochrome, ferrosilicon, and copper plates are mixed and heated in an intermediate frequency induction furnace. A...

example 2

[0009] Example 2: The hammer head is composed of a composite layer on the surface of the parent body. The parent body material is high-boron cast steel. The mass fraction of its chemical composition is as follows: C0.29%, B1.85%, Si1.25%, Mn1. 13%, Cu1.15%, Cr0.97%, Ti0.087%, V0.11%, N0.064%, RE0.19%, S0.042%, P0.047%, Fe92.82%; composite layer It is a composite layer of ceramic particles, and the volume fraction of its components is: 40 mesh WC 30%, 60 mesh ferrochrome powder 15%, PVA binder 5.5%, borax 2.5%, Eps microbeads 47%.

[0010] The casting method of the present invention is a shape casting method combining lost foam casting and cast infiltration casting, which uses negative pressure to infiltrate high-temperature molten steel into the composite layer and forms a metallurgical bond; wherein, the processes such as smelting and heat treatment of high boron cast steel are : Mix and heat ordinary steel scrap, ferrochrome, ferrosilicon, and copper plate in an intermediate...

example 3

[0011] Example 3: The hammer head is composed of a composite layer on the surface of the parent body. The parent material is high-boron cast steel. The mass fraction of its chemical composition is as follows: C0.389%, B2.39%, Si1.41%, Mn1. 17%, Cu1.35%, Cr1.09%, Ti0.086%, V0.17%, N0.084%, RE0.27%, S0.037%, P0.044%, Fe91.51%; composite layer It is a composite layer of ceramic particles, and the volume fraction of its components is: 40 mesh WC 40%, 60 mesh ferrochrome powder 20%, PVA binder 7%, borax 3%, Eps microbeads 30%.

[0012]The casting method of the present invention is a shape casting method combining lost foam casting and cast infiltration casting, which uses negative pressure to infiltrate high-temperature molten steel into the composite layer and forms a metallurgical bond; wherein, the processes such as smelting and heat treatment of high boron cast steel are : Mix and heat ordinary steel scrap, ferrochrome, ferrosilicon, and copper plate in an intermediate frequenc...

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Abstract

The invention discloses a crusher hammer with a ceramic abrasion-resistant layer and a casting method thereof. The hammer adopts high boron cast steel as a parent body and a ceramic particle composite layer as a surface layer of the hammer, and is produced through a shape casting method that evaporated pattern casting is combined with casting by a cast-penetration process, and high temperature molten steel is taken as a parent body and is penetrated into the ceramic particle composite layer to form metallurgical bonding. The produced hammer has good strength and toughness as well as high hardness and wearing resistance.

Description

technical field [0001] The invention relates to a crusher hammer head with a ceramic wear-resistant layer and a casting method thereof. Background technique [0002] The hammer head is the main working part of various hammer crushers, and it is also a vulnerable part, with a huge annual consumption. Through a large number of follow-up investigations on the wear-resistant material industry, it is found that the common problems of hammer heads made of wear-resistant steel materials are: the service life of high manganese steel hammer heads is short; Poor abrasiveness; nickel-hard cast iron and high-chromium cast iron have high hardness and good wear resistance, but the strength and toughness of the material are poor, and they are prone to fracture under the action of crushing impact force; mechanical assembly, bonding compounding and metallurgical compounding are used. The cast iron hammer head produced by the method is good in use effect, but has disadvantages such as comple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C13/28C22C38/32C21C7/06B22D23/00B22C7/02
Inventor 卓荣明杨大春
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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