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Preparation method of high-strength/ductility high manganese steel base TiN steel bonded hard alloy

A technology of steel-bonded hard alloy and matrix alloy powder, which is applied in the field of preparation of high-strength and high-manganese steel-based TiN steel-bonded hard alloy, which can solve the problems of material structure and performance adverse effects, unsuitable for large-scale production, and high preparation costs , to achieve the effect of improving the bending strength and various properties, small size and uniform distribution

Inactive Publication Date: 2017-06-09
JIANGSU HUICHENG MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] 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 complicated 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, and the preparation cost is higher than the existing process, so it is not suitable for large-scale production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for preparing a high-strength and tough high-manganese steel-based TiN steel-bonded hard alloy, which adopts the following technical scheme:

[0045] (1) Raw materials:

[0046] The raw materials used are Ti02 powder, ferrochrome powder, ferromolybdenum powder, ferrovanadium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite, industrial urea ((NH2)2CO) or ammonia water, CeO2, Y3O2, One or three of La2O3, PVA, the powder particle size is 10-50μm;

[0047] (2) Material preparation:

[0048] 1) Preparation of in-situ synthesized TiN powder: prepare TiO2 powder and urea ((NH2)2CO) at an N / Ti atomic ratio of 0.4 to prepare in-situ synthesized TiN mixed powder;

[0049] 2) Preparation of matrix alloy powder for the bonding phase: the chemical composition of the bonding 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;

...

Embodiment 2

[0058] A method for preparing a high-strength and tough high-manganese steel-based TiN steel-bonded hard alloy, which adopts the following technical scheme:

[0059] (1) Raw materials:

[0060] The raw materials used are TiH2 powder, ferrochrome powder, ferromolybdenum powder, ferrovanadium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite, industrial urea ((NH2)2CO) or ammonia water, CeO2, Y3O2, One or three of La2O3, PVA, the powder particle size is 10-50μm;

[0061] (2) Material preparation:

[0062] 1) Preparation of in-situ synthesized TiN powder: prepare iH2 powder and urea ((NH2)2CO) at an N / Ti atomic ratio of 0.9 to prepare in-situ synthesized TiN mixed powder;

[0063] 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 impuri...

Embodiment 3

[0072] A method for preparing a high-strength and tough high-manganese steel-based TiN steel-bonded hard alloy, which adopts the following technical scheme:

[0073] (1) Raw materials:

[0074] The raw materials used are Ti powder, ferrochrome powder, ferromolybdenum powder, ferrovanadium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, industrial urea ((NH2)2CO) or ammonia water, colloidal graphite, CeO2, Y3O2, One or three of La2O3, PVA, the powder particle size is 10-50μm;

[0075] (2) Material preparation:

[0076] 1) Preparation of in-situ synthesized TiN powder: prepare Ti powder and urea ((NH2)2CO) at an N / Ti atomic ratio of 1.0 to prepare in-situ synthesized TiN mixed powder;

[0077] 2) Preparation of matrix alloy powder for the bonding phase: the chemical composition of the bonding 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 unavo...

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Abstract

The invention relates to a preparation method of a high-strength / ductility high manganese steel base TiN steel bonded hard alloy. The preparation method is characterized by preparing in-situ synthesized TiN powder: one or three of TiO2 powder, TiH2 powder or Ti powder and urea ((NH2)2CO) are mixed according to a N / Ti atomic ratio of 0.4-1.1 to prepare the in-situ synthesized TiN mixed powder; and ferromolybdenum powder, ferrovanadium powder, ferrochromium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite and rare earth raw materials are mixed according to a ratio needed by a bonding phase metal chemical component mass ratio, and are sintered to obtain the TiN steel bonded alloy. The preparation method combines the in-situ reaction synthesis technology with the liquid-phase sintering technology; and reinforced particles are fine in size, free of sharp angles on the surfaces, better in matrix interface combination and clean in interfaces. The steel bonded alloy preparation method can improve the comprehensive mechanical performance of the alloy, and is low in cost and simple in process.

Description

[0001] field of invention [0002] The invention relates to a method for preparing a high-strength, toughness, and high-manganese steel-based TiN steel-bonded hard alloy, in particular to the technical field of preparing high-strength, toughness, and high-manganese steel-based TiN steel-bonded hard alloys 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 p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/12C22C38/02C22C38/04C22C38/08C22C33/02C22C29/16C22C1/05C22C1/10
CPCC22C38/12C22C1/053C22C29/005C22C29/16C22C33/0207C22C33/0292C22C38/005C22C38/02C22C38/04C22C38/08
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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