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A kind of preparation method of TIC heat-resistant steel-bonded hard alloy

A steel-bonded cemented carbide and heat-resistant technology, which is applied in the preparation field of TiC heat-resistant steel-bonded cemented carbide, can solve the problems of adverse effects on material structure and properties, unsuitable for large-scale production, and high preparation cost, and achieves small size, Inexpensive, evenly distributed effects

Active Publication Date: 2018-03-27
JIANGSU HUICHENG MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But the in-situ synthesis method also has many deficiencies: the reinforcing particles are limited to the thermodynamically stable particles in a specific matrix; The shape is controlled by the kinetics of the nucleation and growth process, and after the in-situ particles are formed, they often segregate in the dendrite gap or grain boundary during the casting process, which has a negative impact on the structure and properties of the material, and the processability is poor. The cost is higher than the existing technology, not suitable for large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]A preparation method of TiC heat-resistant steel-bonded hard alloy, which adopts the following technical scheme:

[0029] (1) Raw materials:

[0030] The raw materials used are titanium powder, ferrochrome powder, ferromolybdenum powder, ferroboron powder, ferrosilicon powder, ferromanganese powder, iron powder, nickel powder, copper powder, colloidal graphite, CeO 2 , PVA, the powder particle size is below 10-50μm;

[0031] (2) Material preparation:

[0032] 1) Preparation of in-situ synthesized TiC mixed powder: Titanium (Ti) powder and graphite powder were prepared at a C / Ti atomic ratio of 0.85 to prepare in-situ synthesized TiC mixed powder;

[0033] 2) Preparation of binder phase matrix alloy powder: The chemical composition of the binder phase metal material is: C0.3%, Cr4.0%, Mo1.5%, V0.6%, Si0.4%, Mn0.3% , B0.6%, Cu0.5%, Ni1.0%, S≤0.02, P≤0.02, CeO 2 ≤0.8%, balance Fe, and unavoidable impurity elements;

[0034] 3) Preparation of TiC heat-resistant steel-bo...

Embodiment 2

[0041] A preparation method of TiC heat-resistant steel-bonded hard alloy, which adopts the following technical scheme:

[0042] (1) Raw materials:

[0043] The raw materials used are titanium powder, ferrochrome powder, ferromolybdenum powder, ferroboron powder, ferrosilicon powder, ferromanganese powder, iron powder, nickel powder, copper powder, colloidal graphite, CeO 2 , Y 3 o 2 Two kinds, PVA, the powder particle size is below 10-50μm;

[0044] (2) Material preparation:

[0045] 1) Preparation of in-situ synthesized TiC mixed powder: Titanium (Ti) powder and graphite powder were prepared with a C / Ti atomic ratio of 0.9 to prepare in-situ synthesized TiC mixed powder;

[0046] 2) Preparation of binder phase matrix alloy powder: The chemical composition of the binder phase metal material is: C0.4%, Cr5.0%, Mo2.3%, V0.9%, Si0.6%, Mn0.5% , B1.2%, Cu0.6%, Ni1.3%, S≤0.02, P≤0.02, CeO 2 0.5%, Y 3 o 2 0.3%, balance Fe, and unavoidable impurity elements;

[0047] 3) Pr...

Embodiment 3

[0054] A preparation method of TiC heat-resistant steel-bonded hard alloy, which adopts the following technical scheme:

[0055] (1) Raw materials:

[0056] The raw materials used are titanium powder, ferrochrome powder, ferromolybdenum powder, ferroboron powder, ferrosilicon powder, ferromanganese powder, iron powder, nickel powder, copper powder, colloidal graphite, CeO 2 , Y 3 o 2 、La 2 o 3 , PVA, the powder particle size is below 10-50μm;

[0057] (2) Material preparation:

[0058] 1) Preparation of in-situ synthesized TiC mixed powder: Titanium (Ti) powder and graphite powder were prepared with a C / Ti atomic ratio of 1.0 to prepare in-situ synthesized TiC mixed powder;

[0059] 2) Preparation of binder phase matrix alloy powder: The chemical composition of the binder phase metal material is: C0.5%, Cr6.0%, Mo3.0%, V1.2%, Si0.9%, Mn0.6% , B1.5%, Cu0.8%, Ni2.0%, S≤0.02, P≤0.02, CeO 2 0.3%, Y 3 o 2 0.3%, La 2 o 3 0.2%, balance Fe, and unavoidable impurity elemen...

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Abstract

The invention relates to a preparation method of TiC heatproof steel bonded carbide. The method comprises the following steps: processing titanium powder and graphite powder according to a C / Ti atom ratio of 0.7-1.1 to prepare in situ synthesized TiC powder with a required ratio; and preparing ferrochrome powder, ferromolybdenum powder, ferroboron powder, iron powder, nickel powder, copper powder, colloidal graphite and a rare earth raw material according to the required proportions of a mass ratio of bonding phase metal chemical components, adding a steel ball, adding anhydrous ethanol as a medium, adding PVA, carrying out ball milling, drying a slurry obtained after ball milling, carrying out compacting formation, and sintering to obtain steel bonded carbide. The TiC / heatproof steel bonded carbide is prepared in the invention through combining an in situ reaction synthesis technology with a liquid phase sintering technology. TiC is synthesized in situ in a matrix through a reaction in the sintering process, so fine dimension of particles is enhanced, the surface has no closed angles, the matrix interface combination is good, and the interface is clean. The preparation method of the steel bonded carbide has the advantages of improvement of the comprehensive and mechanical performances of the carbide, low price, and simple process.

Description

field of invention [0001] The invention relates to a preparation method of TiC heat-resistant steel-bonded hard alloy, in particular to the technical field of preparing TiC heat-resistant steel-bonded hard alloy by a reaction sintering method. Background of the invention [0002] Steel-bonded cemented carbide (hereinafter referred to as steel-bonded alloy) is produced between cemented carbide and alloy tool steel, die steel and high-speed steel with steel as the matrix, tungsten carbide, titanium carbide, etc. Between high-life mold materials and engineering materials. The proportion range of steel bonded alloy steel matrix binder phase and hard phase is quite wide, which determines that it has the following excellent properties: 1) Wide range of process properties, mainly forgeability, machinability and heat treatability and solderability. 2) Good physical and mechanical properties, mainly in wear resistance equivalent to high cobalt cemented carbide; higher rigidity, ela...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/02C22C38/54
Inventor 邵慧萍丁刚丁家伟印杰施孟达朱坚王洪仁
Owner JIANGSU HUICHENG MACHINERY MFG
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