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Preparation method of high-strength-and-toughness high manganese steel-based VC steel bond hard alloy

A technology of steel-bonded hard alloy and high manganese steel, which is applied in the field of preparing high-strength and tough high-manganese steel-based VC steel-bonded hard alloy by reaction sintering method, can solve the adverse effects of material structure and performance, and is not suitable for large-scale production and preparation High cost and other issues, to achieve the effect of improving various performances, small size, and uniform distribution

Inactive Publication Date: 2017-06-06
JIANGSU HUICHENG MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] However, the in situ synthesis method also has many disadvantages: the reinforced particles are limited to thermodynamically stable particles in a specific matrix; the generated ones are relatively complex and difficult to control; After the bit particles are formed, they often segregate in dendrite gaps or grain boundaries during the casting process, which adversely affects the structure and properties of the material, and the processability is poor, the preparation cost is higher than the existing process, and it is not suitable for large-scale production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A preparation method of high-strength and tough high-manganese steel-based VC steel-bonded hard alloy, which adopts the following technical scheme:

[0039] (1) Raw materials:

[0040] The raw materials used are V205 powder, ferromolybdenum powder, ferrovanadium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite, CeO 2 , PVA, the powder particle size is 10-50μm;

[0041] (2) Material preparation:

[0042] 1) Preparation of in-situ synthesized VC mixed powder: V205 powder (vanadium) and colloidal graphite powder were prepared according to the C / V205 atomic ratio of 0.4 to prepare in-situ synthesized VC mixed powder;

[0043] 2) Preparation of binder phase matrix alloy powder: The chemical composition of the binder phase metal material is: C0.9%, Mo1.5%, V0.1%, Si0.4%, Mn10%, Ni1.5%, S ≤0.02, P≤0.02, CeO 2 ≤0.8%, balance Fe, and unavoidable impurity elements;

[0044] 3) Preparation of high-strength and tough high-manga...

Embodiment 2

[0051] A preparation method of high-strength and tough high-manganese steel-based VC steel-bonded hard alloy, which adopts the following technical scheme:

[0052] (1) Raw materials:

[0053] The raw materials used are V205 powder, ferromolybdenum powder, ferrovanadium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite, CeO 2 , Y 3 o 2 Two kinds, PVA, the powder particle size is 10-50μm;

[0054] (2) Material preparation:

[0055] 1) Preparation of in-situ synthesized VC mixed powder: V205 powder (vanadium) and colloidal graphite powder were prepared according to the C / V205 atomic ratio of 0.40 to prepare in-situ synthesized VC mixed powder;

[0056] 2) Preparation of matrix alloy powder for the bonding phase: The chemical composition of the bonding phase metal material is: C1.2%, Mo1.8%, V0.2%, Si0.5%, Mn12%, Ni1.8%, S ≤0.02, P≤0.02, CeO 2 0.5%, Y 3 o 2 0.3%, balance Fe, and unavoidable impurity elements;

[0057] 3) P...

Embodiment 3

[0064] A preparation method of high-strength and tough high-manganese steel-based VC steel-bonded hard alloy, which adopts the following technical scheme:

[0065] (1) Raw materials:

[0066] The raw materials used are V205 powder, ferromolybdenum powder, ferrovanadium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite, CeO 2 , Y 3 o 2 , La 2 o 3 , PVA, the powder particle size is 10-50μm;

[0067] (2) Material preparation:

[0068] 1) Preparation of in-situ synthesized VC mixed powder: V205 powder (vanadium) and colloidal graphite powder were prepared according to the C / V205 atomic ratio of 0.5 to prepare in-situ synthesized VC mixed powder;

[0069] 2) Preparation of binder phase matrix alloy powder: The chemical composition of the binder phase metal material is: C1.5%, Mo2.0%, V0.3%, Si0.6%, Mn13%, 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;

[...

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Abstract

The invention relates to a preparation method of a high-strength-and-toughness high manganese steel-based VC steel bond hard alloy. The preparation method is characterized by comprising the following steps of mixing V2O5 powder (vanadium) and graphite powder according to a C / V2O5 atom ratio of 0.4 to 0.5 to prepare in-situ synthesized VC mixed powder, mixing molybdenum iron powder, vanadium iron powder, manganese iron powder, silicon iron powder, iron powder, nickel powder, colloid graphite and rare earth raw materials according to the required mass ratio of metal chemical components of a bonding phase, feeding steel balls for ball grinding, adding absolute ethyl alcohol serving as a medium and PVA, drying slurry obtained by the ball grinding, and carrying out pressing forming and sintering to obtain the steel bond alloy. An in-situ reaction synthesis technology and a liquid phase sintering technology are combined to prepare the high-strength-and-toughness high manganese steel-based VC steel bond hard alloy. As VC is synthesized in situ in a base body through reaction in the sintering process, enhanced particles are small in particle size, and no sharp corners are formed on the surface; and the base body is relatively high in interface combination, and the interface is clean. The preparation method of the steel bond alloy can improve the comprehensive mechanical property of the alloy; and furthermore, the preparation method is low in cost and simple in process.

Description

[0001] field of invention [0002] The invention relates to a preparation method of a high-strength and toughness high-manganese steel-based VC steel-bonded hard alloy, in particular to the technical field of preparing a high-strength and toughness high-manganese steel-based VC steel-bonded hard alloy by a reaction sintering method. [0003] Background of the invention [0004] 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 prope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/08C22C38/12C22C33/02C22C29/02C22C1/05C22C1/10
CPCC22C38/12C22C1/055C22C29/005C22C29/02C22C33/0207C22C33/0292C22C38/005C22C38/02C22C38/04C22C38/08
Inventor 邵慧萍丁家伟丁刚耿德英鹿薇薇鹿策施孟达陈志和朱坚
Owner JIANGSU HUICHENG MACHINERY MFG
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