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Preparation method of (TiV)C steel bond hard alloy

A technology of steel-bonded hard alloy and matrix alloy powder, which is applied in the field of preparation of (TiV)C steel-bonded hard alloy, which can solve the problems of adverse effects on material structure and performance, unsuitability for large-scale production, and high preparation costs. Small, Inexpensive, Evenly Distributed Effects

Inactive Publication Date: 2016-03-30
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

[0027] A preparation method of (TiV)C steel-bonded hard alloy, which adopts the following technical scheme:

[0028] (1) The raw materials used are titanium powder, ferrovanadium powder, ferrochrome powder, ferromolybdenum powder, ferrosilicon powder, ferromanganese powder, ferroboron powder, iron powder, nickel powder, copper powder, colloidal graphite, CeO 2 , PVA, the powder particle size is below 10-50μm;

[0029] (2) Material preparation:

[0030] 1) In-situ synthesis (TiV) C mixed powder preparation: prepare titanium (Ti) and vanadium iron powder according to the ratio of titanium: vanadium 1:1, and then mix with graphite powder according to the atomic mole of C / (Ti+V) Ratio of 0.8 to prepare in situ synthesis (TiV)C mixed powder;

[0031] 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%, Mn0.4% , B0.6%, Cu0.5%, Ni0.85%, S≤0.02, P≤0.02, CeO 2 0.8%, balance Fe, and ...

Embodiment 2

[0039] A preparation method of TiC steel-bonded hard alloy, which adopts the following technical scheme:

[0040] (1) The raw materials used are titanium powder, ferrovanadium powder, ferrochrome powder, ferromolybdenum powder, ferrosilicon powder, ferromanganese powder, ferroboron 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;

[0041] (2) Material preparation:

[0042] 1) In-situ synthesis (TiV) C mixed powder preparation: prepare titanium (Ti) and vanadium iron powder according to the ratio of titanium: vanadium 1:1, and then mix with graphite powder according to the atomic mole of C / (Ti+V) Ratio of 0.8 to prepare in situ synthesis (TiV)C mixed powder;

[0043] 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%,...

Embodiment 3

[0051] A preparation method of TiC steel-bonded hard alloy, which adopts the following technical scheme:

[0052] (1) The raw materials used are titanium powder, ferrovanadium powder, ferrochrome powder, ferromolybdenum powder, ferrosilicon powder, ferromanganese powder, ferroboron 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;

[0053] (2) Material preparation:

[0054] 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;

[0055] 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 elements;

[0056] 3) P...

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Abstract

The invention provides a preparation method of (TiV)C steel bond hard alloy. Titanium and vanadium whose ratio is 1:1 are prepared, and a mixture and graphite powder are prepared into in-situ synthesized (TiV)C mixed powder, wherein the atomic mole ratio between C and Ti+V is 0.7-1.1; ferrovanadium powder, ferrochromium powder, ferromolybdenum powder, ferroboron powder, ferrous powder, ferrosilicon powder, ferromanganese powder, nickel powder, copper powder, colloidal graphite and a rare earth raw material are prepared according to a required mass ratio of bonded-phase metal chemical components, ball-milling is carried out by a steel ball, absolute ethanol as a medium and PVA (polyvinyl alcohol) are added, after the ball-milling is finished, slurry is dried and pressed for forming, and the steel bond alloy is obtained. In situ reaction synthesis technology and liquid phase sintering technology are combined, and the (TiV)C steel bond hard alloy is prepared. (TiV)C is synthesized in situ in a substrate through reaction in the sintering process, the fineness of particles is improved, no sharp angle is formed on the surface, and a substrate interface is relatively good in adhesion and clean. The comprehensive mechanical property of the alloy can be improved, the price is low, and the process is simple and convenient.

Description

technical field [0001] The invention relates to a preparation method of (TiV)C steel-bonded hard alloy, in particular to the technical field of preparing (TiV)C 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, elastic modulus, flexural strength an...

Claims

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Application Information

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