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A composite casting product comprising a titanium carbide-based powder metallurgy product

A powder metallurgy and composite casting technology, applied in the field of metallurgy, can solve the problems of shedding, unreliable bonding, and high maintenance costs, and achieve the effects of extending service life, avoiding shedding and cracking, and increasing firmness.

Active Publication Date: 2022-07-29
山东恒森特种装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This composite method is only the bonding between the two materials without diffusion fusion, resulting in unreliable bonding, often falling off and breaking during work, easy to damage the equipment, high maintenance costs, and easy to cause waste of materials

Method used

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  • A composite casting product comprising a titanium carbide-based powder metallurgy product

Examples

Experimental program
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Effect test

Embodiment 1

[0022] The cutting teeth of coal mine excavation equipment are produced by the composite melting and casting process.

[0023] In this embodiment, the titanium carbide-based powder metallurgy product (TM50) includes the following components by mass percentage: 48% TiC, 8.5% Mn, 2% Mo, 1.5% Ni, 13% C, 27% Fe. The titanium carbide-based powder metallurgy product (TM50) cemented carbide material is formed by sintering the above components in proportion. The resulting titanium carbide-based powder metallurgy product (TM50) has a density of 6.5 to 6.6 g / cm 3 , the hardness is HRA86~88. The base material is high manganese steel molten steel.

[0024] The following process steps are used:

[0025] The titanium carbide based powder metallurgy product (TM50) was placed in the top position of the working part in the pick die. Under the negative pressure environment, the high manganese steel matrix molten steel was poured into the pick mold, and the pouring temperature was 1600 °C. ...

Embodiment 2

[0029] The drill bit of the rotary excavator is produced by the composite casting process.

[0030] In this embodiment, the titanium carbide-based powder metallurgy product (TM45) includes the following components by mass percentage: 55% TiC, 9% Mn, 2% Mo, 1.7% Ni, 12% C, 20.3% Fe. The titanium carbide-based powder metallurgy product (TM45) cemented carbide material is formed by sintering the above components in proportion. The resulting titanium carbide-based powder metallurgy product (TM45) has a density of 6.4 to 6.5 g / cm 3 , the hardness is HRA88~90. The matrix material is also high manganese steel molten steel.

[0031] According to the process steps of the above-mentioned first embodiment, the titanium carbide-based powder metallurgy product (TM45) is placed in the working part of the hammer-bit mold. Under the negative pressure environment, pour the base molten steel into the hammer-bit mold, and the pouring temperature is 1500 ℃. The negative pressure environment a...

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Abstract

The invention discloses a composite casting product comprising a titanium carbide-based powder metallurgy product, belonging to the technical field of metallurgy. The titanium carbide-based powder metallurgy products in this product are produced by sintering the following components by mass percentage: 48%-55% TiC, 8.5%-9% Mn, 2% Mo, 1.5%-1.7% Ni, 12%-13% C. The balance is Fe. The metallurgical product and the base material are formed by one-time casting through a melting and casting process, and a dispersive metallurgical fusion is formed between the metallurgical product and the base material. The present invention can form a coating structure carbide with the base material by defining the ratio relationship of each component in the titanium carbide-based powder metallurgy product, which can not only meet the hardness requirements of the hard metallurgical product, but also increase the hardness of the hard metallurgy product. The wettability of the product and the base material realizes the dispersive metallurgical fusion between the metallurgical product and the base material, meets the requirements of product wear resistance and firmness, and prolongs the service life of the product.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a composite casting product comprising a titanium carbide-based powder metallurgy product. Background technique [0002] The powder metallurgy process product is a cemented carbide material formed by stirring, briquetting and sintering of hard elements such as tungsten and titanium powder and cobalt and molybdenum and other elements. This material has high hardness, which can reach HRA90--93, and is a widely used superhard wear-resistant material. However, the existing cemented carbides made of powder metallurgy materials cannot form melting and diffusion with the matrix material due to their internal pore structure and inherent defects such as low structure strength and poor toughness, and it is difficult to form a fusion with the matrix material. form a strong bond. [0003] At present, the method of compounding the cemented carbide material with the parent iron-based mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/10B22D18/06B22D23/04
CPCC22C29/10C22C29/067B22D18/06B22D23/04
Inventor 孙岗
Owner 山东恒森特种装备有限公司
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