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

A technology of steel-bonded hard alloy and ultra-high manganese, which is applied in the field of preparation of high-strength and ultra-high manganese steel-based VC steel-bonded hard alloy, which can solve the adverse effects of material structure and performance, unsuitable for large-scale production, high preparation cost, etc. Problems, to achieve the effect of improving various performances, 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 ultra-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, ferrochrome powder, ferromolybdenum powder, ferrovanadium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite, one or three of CeO2, Y3O2, La2O3, PVA, powder The 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%, Cr2.0%, Mo0.6%, V0.5%, Si0.5%, Mn17%, Ni0 .6%, S≤0.02, P≤0.02, one of CeO2, Y3O2, La2O3 or a combination of two or more ≤...

Embodiment 2

[0051] A preparation method of high-strength and toughness ultra-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, ferrochrome powder, ferromolybdenum powder, ferrovanadium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite, one or three of CeO2, Y3O2, La2O3, PVA, powder The 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 0.45 to prepare in-situ synthesized VC mixed powder;

[0056] 2) Preparation of binder phase matrix alloy powder: The chemical composition of the binder phase metal material is: C0.1.1%, Cr2.5%, Mo0.9%, V0.85%, Si0.65%, Mn18%, Ni0 .8%, S≤0.02, P≤0.02, CeO 2 0.5%, Y 3 o 2 0.3%, balance Fe, and unavoida...

Embodiment 3

[0064]A preparation method of high-strength and toughness ultra-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, ferrochrome powder, ferromolybdenum powder, ferrovanadium powder, ferromanganese powder, ferrosilicon powder, iron powder, nickel powder, colloidal graphite, one or three of CeO2, Y3O2, La2O3, PVA, powder The 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 matrix alloy powder for the bonding phase: the mass percentage of the chemical composition of the metal material for the bonding phase is:

[0070] C1.5%, Cr3.5%, Mo2.0%, V1.0%, Si0.8%, Mn20%, Ni1.0%, S≤0.02, P≤0.02, CeO 2 , Y...

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Abstract

The invention relates to a preparation method of a high-strength-and-toughness ultrahigh-manganese-steel based VC steel bonded hard alloy. The preparation method is characterized in that V205 powder(vanadium) and graphite powder are prepared according to the C / V205 atomic ratio ranging from 0.4 to 0.5 to form in-situ synthesis VC mixed powder; and ferro-molybdenum powder, ferrovanadium powder, chromium iron powder, ferromanganese iron powder, silicon iron powder, iron powder, nickel powder, aquadag and rare earth raw materials are prepared according to the needed proportion of the bonding phase metal chemical component mass ratio, steel balls are added for ball milling, absolute ethyl alcohol is added to serve as a medium and PVA, and slurry is dried to be pressed, formed and sintered after ball milling to obtain the steel bonded hard alloy. According to the preparation method, the in-situ reaction synthetic technique and the liquid phase sintering technique are combined, as VC is obtained through in-situ synthesis inside a base in reacting in the sintering process, the reinforced particle size is small, the surface is free of sharp corners, base interface bonding is better, and an interface is clean. By means of the steel bonded alloy preparing method, the comprehensive mechanical property of the alloy can be improved, the price is low, and the process is simple and convenient.

Description

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

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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