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

A technology for steel-bonded cemented carbide and high-manganese steel, which is applied in the field of preparing high-strength and tough-modified high-manganese-steel-based VC steel-bonded cemented carbide by a reaction sintering method, which can solve the adverse effects of material structure and performance, and is unsuitable for large-scale production. The problem of high preparation cost is to achieve the effect of improving 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

[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 toughness modified high manganese steel base VC steel bonded cemented carbide adopts the following technical schemes:

[0039] (1) Raw materials:

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

[0041] (2) Material preparation:

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

[0043] 2) Preparation of bonding phase matrix alloy powder: The mass percentage of the chemical composition of the bonding phase metal material is: C1.0%, Cr2.0%, Mo1.4%, V0.8%, Si0.6%, Mn11%, Ni1 .2%, S≤0.02, P≤0.02, CeO 2 ≤0.8%, balance Fe, and inevitable impurity elements;

[0044] 3...

Embodiment 2

[0051] A preparation method of high strength and toughness modified high manganese steel base VC steel bonded cemented carbide adopts the following technical schemes:

[0052] (1) Raw materials:

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

[0054] (2) Material preparation:

[0055] 1) Preparation of in-situ synthesized VC mixed powder: V205 powder (vanadium) and colloidal graphite powder are formulated into in-situ synthesized VC mixed powder according to the C / V205 atomic ratio of 0.45;

[0056] 2) Preparation of bonding phase matrix alloy powder: The mass percentage of the chemical composition of the bonding phase metal material is: C1.3%, Cr2.2%, Mo1.8%, V1.5%, Si0.7%, Mn12%, Ni1 .6%, S≤0.02, P≤0.02, CeO 2 0.5%, Y 3 O 2 0.3%, the balance Fe, and in...

Embodiment 3

[0064] A preparation method of high strength and toughness modified high manganese steel base VC steel bonded cemented carbide adopts the following technical schemes:

[0065] (1) Raw materials:

[0066] The raw materials used are V205 powder, ferromolybdenum powder, ferrochrome 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 particle size of the powder is 10-50μm;

[0067] (2) Material preparation:

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

[0069] 2) Preparation of bonding phase matrix alloy powder: The mass percentage of the chemical composition of the bonding phase metal material is: C1.0~1.5%, Cr1.8~2.5%, Mo0.6~2.0%, V0.5~2.0%, Si0 .6~0.9%, Mn10~14%, Ni0.5~2.0%, S≤0.02, P≤0.02, CeO 2 , Y 3 O 2 , La...

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Abstract

The invention relates to a preparation method of a high-strength / ductility modified high manganese steel base VC steel bonded hard alloy. The preparation method is characterized by preparing in-situ synthesized VC mixed powder through V205 powder (vanadium) and graphite powder according to a C / V205 atomic ratio of 0.4-0.5; 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 added in a steel ball for ball milling; anhydrous ethanol is added as a medium and PVA; and after ball milling, pulp is dried to press and sinter to obtain the steel bonded alloy. The preparation method combines the in-situ reaction synthesis technology with the liquid-phase sintering technology; and as VC is synthesized in situ in matrix through the reaction in the sintering process, 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] Invention field [0002] The invention relates to a method for preparing high-strength modified high-manganese steel-based VC steel-bonded cemented carbide, in particular to the technical field of preparing high-strength modified high-manganese steel-based VC steel-bonded cemented carbide by a reaction sintering method. [0003] Background of the invention [0004] Steel-bonded cemented carbide (hereinafter referred to as steel-bonded gold) is based on steel, tungsten carbide, titanium carbide, etc. as the hard phase. It is produced by powder metallurgy, which is between cemented carbide and alloy tool steel, die steel and high-speed steel. Between high-life mold materials and engineering materials. The range of the ratio of the bonding phase and the hard phase of the steel-bonded steel matrix is ​​quite wide, which determines that it has the following excellent properties: 1) A wide range of process properties, mainly forgeability, machinability and heat treatment And weldab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/06C22C38/44C22C38/46C22C38/58C22C38/02C22C33/02C22C1/05B22F9/04B22F3/10
CPCC22C29/067B22F3/1035B22F9/04B22F2009/041B22F2009/043C22C1/058C22C33/0207C22C33/0292C22C38/02C22C38/44C22C38/46C22C38/58
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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