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Preparation method of TiC high-wear-resistant steel-bonded hard alloy

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

Inactive Publication Date: 2014-12-24
JIANGSU HUICHENG MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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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 unavoidab...

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%, balan...

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Abstract

The invention relates to a preparation method of a TiC high-wear-resistant steel-bonded hard alloy. The preparation method is characterized by comprising the following steps: using titanium powder and graphite powder to prepare in-situ synthesized TiC powder according to the atomic ratio 0.7-1.1 of C to Ti; mixing ferrochromium powder, ferromolybdenum powder, ferrovanadium powder, ferrotungsten powder, ferroniobium powder, nickel powder, ferroboron powder, iron powder, colloidal graphite and a rare earth material according to the chemical component mass ratio of the bonding phase metals; filling the mixed powder in a steel ball mill; adding absolute ethyl alcohol as a medium and PVA (Polyvinyl Acetate) to the ball mill; after ball milling, drying the obtained slurry, pressing, molding and sintering the dried substance to obtain the steel-bonded hard alloy. The preparation method disclosed by the invention combines the in-situ reaction synthesis technology with the liquid-phase sintering technology to prepare the TiC high-wear-resistant steel bonded hard alloy. As TiC is prepared by in-situ synthesis inside the substrate through the reaction during the sintering process, the reinforced particle size is fine, the surface is free of sharp corners, the substrate interface bonding effect is good, and the interface is clean. The preparation method for the steel-bonded alloy can improve the comprehensive mechanical property of the alloy, and is low in price and simple and convenient in the technology.

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 Applications(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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