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A kind of preparation method of tic high wear-resistant steel-bonded hard alloy

A steel-bonded hard alloy, high wear-resistant technology, applied in the field of preparing TiC high wear-resistant steel-bonded hard alloy by reaction sintering method, can solve the problems of material structure and performance adverse effects, unsuitable for large-scale production, high preparation cost, etc. , to achieve the effect of improving various properties, small size and uniform distribution

Inactive Publication Date: 2016-04-13
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 high wear-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, ferrotungsten powder, ferrovanadium powder, ferroniobium powder, ferrosilicon powder, ferromanganese powder, iron powder, nickel 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: C2.5%, Cr4.5%, W2.0%, Mo4.5%, V5.2%, Ni0.6% , Nb0.2%, Si0.5%, Mn0.4%, S≤0.02, P≤0.02, CeO 2 ≤0.8%, balance Fe, and unavoidable impurity elements;

[0034] 3) Prepar...

Embodiment 2

[0041] A preparation method of TiC high wear-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, ferrotungsten powder, ferrovanadium powder, ferroniobium powder, ferrosilicon powder, ferromanganese powder, iron powder, nickel 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: C2.7%, Cr5.0%, W2.5%, Mo5.0%, V5.5%, Ni0.8% , Nb0.4%, Si0.6%, Mn0.5%, S≤0.02, P≤0.02, CeO 2 0.5%, Y 3 o 2 0.3%, balance Fe, and unavoidable ...

Embodiment 3

[0054] A preparation method of TiC high wear-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, ferrotungsten powder, ferrovanadium powder, ferroniobium powder, ferrosilicon powder, ferromanganese powder, iron powder, nickel 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: C2.9%, Cr5.5%, W2.8%, Mo6.0%, V5.8%, Ni0.9% , Nb0.6%, Si0.7%, Mn0.5%, S≤0.02, P≤0.02, CeO 2 0.3%, Y 3 o 2 0.3%, La 2 o 3 0.2%, balance...

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Abstract

The invention relates to a preparation method of TiC high wear-resistant steel-bonded hard alloy, which is characterized in that titanium powder and graphite powder are prepared into in-situ synthesized TiC powder in a required ratio according to the C / Ti atomic ratio of 0.7-1.1; Ferrochrome powder, ferromolybdenum powder, ferrovanadium powder, ferrotungsten powder, ferroniobium powder, nickel powder, ferroboron powder, iron powder, colloidal graphite and rare earth raw materials are prepared according to the required ratio of the chemical composition of the bonding phase metal, and the Put steel balls into ball mill, wherein add absolute ethanol as medium and PVA, after ball milling, dry the slurry, press into shape, sinter to obtain steel-bonded alloy. The invention combines in-situ reaction synthesis technology with liquid phase sintering technology to prepare TiC / high wear-resistant steel-bonded hard alloy. Since TiC is synthesized in situ inside the matrix through the reaction in the sintering process, the reinforced particle size is small, the surface has no sharp corners, and the matrix interface is well bonded and clean. The prepared steel-bonded alloy method can improve the comprehensive mechanical properties of the alloy, and has low price and simple process.

Description

technical field [0001] The invention relates to a preparation method of TiC high wear-resistant steel-bonded hard alloy, in particular to the technical field of preparing TiC high wear-resistant steel-bonded hard alloy by a reaction sintering method. Background technique [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): C22C1/05C22C32/00C22C29/10C22C33/02
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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