TiCN-based steel-bonded cemented carbide, and preparation method and application thereof

A technology of steel-bonded cemented carbide and hard phase, applied in the field of powder metallurgy, can solve the problem that the interface between hard phase TiCN particles and the matrix is ​​not well combined, the strengthening effect of TiCN particles cannot be exerted well, and the TiCN hard phase Problems such as poor compatibility with the steel matrix, to achieve the effects of reduced barriers to migration, good deoxidation, excellent high temperature red hardness and oxidation resistance

Active Publication Date: 2015-07-01
ZHUZHOU JINGGONG CEMENTED CARBIDE
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Problems solved by technology

The methods for preparing TiCN-based steel-bonded cemented carbide materials mainly include powder metallurgy, casting, in-situ synthesis, impregnation, and hot pressing, but the alloy has not yet achieved large-scale industrial production in China.
The powder metallurgy method is a common method for preparing steel-bonded hard alloys in industrial production, but at present, when this method is used to produce TiC-based steel-bonded hard alloys, the wettability is poor due to the poor compatibility of the TiCN hard phase and the steel matrix. , and the surface is easily polluted by attachments, so that the interface between the hard phase TiCN particles and the matrix is ​​not well bonded, and the reinforcement effect of TiCN particles cannot be well exerted.

Method used

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  • TiCN-based steel-bonded cemented carbide, and preparation method and application thereof
  • TiCN-based steel-bonded cemented carbide, and preparation method and application thereof
  • TiCN-based steel-bonded cemented carbide, and preparation method and application thereof

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preparation example Construction

[0030] The preparation method of the above-mentioned TiCN-based steel-bonded hard alloy adopts powder metallurgy, comprising the following steps:

[0031] Step 1: Master alloy preparation, with Fe, Ce, La as raw materials, based on the total mass of Fe—(20~30%) Ce—(8~20%) La master alloy, 20~30% Ce by weight percentage , 8~20% La, the balance is Fe to carry out batching, adopts conventional smelting method to prepare Fe—(20~30%) Ce—(8~20%)La master alloy melt, the Fe—(20 ~30%)Ce—(8~20%)La master alloy melt is made into Fe—(20~30%)Ce—(8~20%)La master alloy powder by conventional water atomization method;

[0032] Step 2: batching, the steel matrix raw material powder, the Fe—(20~30%) Ce—(8~20%) La master alloy powder and TiCN powder prepared in step 1 are batched according to weight percentage;

[0033] Step 3: ball milling and mixing the raw materials obtained in the step 2;

[0034] Step 4: molding the mixture obtained in step 3;

[0035] Step 5: Sintering the compact obta...

Embodiment 1

[0042] A TiCN-based steel-bonded hard alloy, the TiCN-based steel-bonded hard alloy uses TiCN as a hard phase, a steel matrix as a binder phase, Fe-28%Ce-10%La intermediate alloy as an additive, and TiCN Based on the total weight of the steel-bonded hard alloy, the percentage by weight of the TiCN is 35%, the percentage by weight of the steel matrix is ​​64.3%, and the weight of the Fe-28%Ce-10%La master alloy The percentage is 0.7%, and the raw material composition of the steel matrix includes W powder, Mo powder, V powder, Cr powder, Ni powder, Cu powder, carbon black powder, carbonyl iron powder, and reduced iron powder. The mass percentages of the components of the steel matrix in the total mass of the TiCN-based steel-bonded hard alloy are as follows: 4.2% W powder, 3.5% Mo powder, 1.4% V powder, 2.5% Cr powder, 0.5% Ni powder, 0.4% Cu powder, 0.6% carbon black powder, 14% carbonyl iron powder, 37.4% reduced iron powder.

[0043] The preparation method of the above-menti...

Embodiment 2

[0053]A TiCN-based steel-bonded hard alloy, the TiCN-based steel-bonded hard alloy uses TiCN as a hard phase, a steel matrix as a binder phase, Fe-20%Ce-8%La intermediate alloy as an additive, and TiCN Based on the total weight of the steel-bonded hard alloy, the percentage by weight of TiCN is 30%, the percentage by weight of the steel matrix is ​​69.5%, the percentage by weight of the Fe-20%Ce-8%La intermediate alloy is 0.5%, and the weight percentage of the steel matrix is ​​0.5%. The mass percentages of the ingredients in the total mass of TiCN-based steel-bonded cemented carbide are as follows: 3.2% W powder, 2.8% Mo powder, 1% V powder, 1.6% Cr powder, 0.3% Ni powder, 0.3% Cu powder, 0.8% carbon Black powder, 12% carbonyl iron powder, 37.4% reduced iron powder.

[0054] The preparation method of the above-mentioned TiCN-based steel-bonded hard alloy comprises the following steps:

[0055] Step 1: Master alloy preparation, using Fe, Ce, La as raw materials, based on the ...

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Abstract

The invention discloses a TiCN-based steel-bonded cemented carbide. According to the TiCN-based steel-bonded cemented carbide, TiCN is adopted as a had phase, a steel substrate is adopted as a bonding phase, and a Fe-(20-30%)Ce-(8-20%)La intermediate alloy is adopted as an additive. The weight percentage of TiCN is 30-40%. The weight percentage of the steel substrate is 59.2-69.5%. The weight percentage of the Fe-(20-30%)Ce-(8-20%)La intermediate alloy is 0.5-0.8%. The invention also discloses a preparation method of the material. First the Fe-(20-30%)Ce-(8-20%)La intermediate alloy is prepared; and processes such as blending, ball milling mixing, compression molding, sintering, and heat treatment are carried out. The TiCN-based steel-bonded cemented carbide material provided by the invention has the advantages of high density, excellent comprehensive performance, and high cost performance. The preparation method provided by the invention has the advantages of low cost and simple process, and is suitable for industrialized productions.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a TiCN-based steel-bonded hard alloy, a preparation method and an application thereof. Background technique [0002] Cemented carbide has the advantages of high hardness, wear resistance, and good heat resistance, and is widely used in various fields of industrial production. The production of ordinary tungsten-cobalt cemented carbide requires a large amount of national strategic resources such as tungsten and cobalt. For example, the cemented carbide with the grade YG8 contains about 86% tungsten and 8% cobalt. In recent years, tungsten, cobalt, etc. Raw material prices continued to rise. In addition, cobalt, the binder phase component of cemented carbide, has been included in the list of carcinogens by the International Agency for Research on Cancer because of its toxicity, which has aroused people's great attention to occupational health and safety. The search for a new type...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C32/00
Inventor 兰登飞陈明
Owner ZHUZHOU JINGGONG CEMENTED CARBIDE
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