Preparation method for TiC medium alloy cold-working die steel based steel bond hard alloy

A technology of steel-bonded hard alloy and cold-work die steel, which is applied in the field of metal matrix composite material preparation, can solve the problems of difficult forming and sintering, and achieve the effects of short forming cycle, improved uniformity, and uniform pore size distribution

Inactive Publication Date: 2017-06-20
丹阳惠达模具材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention is aimed at the difficulties in forming and sintering existing steel-bonded hard alloys, which are difficult to quickly and economically prepare parts with small grain size, high content, large size and complex shapes, etc., and provides a preparation method. Preparation method of TiC medium-alloy cold-working die steel-based steel-bonded hard alloy with large size, complex shape, simple production process, and low cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: weighing mass fraction is 50% TiC powder and 0.10% Ce, 0.05% Nb, 0.1% SiMgRe, 0.3% graphite powder, 5% carbonyl iron powder, Cr4W2MoV medium alloy cold work die steel matrix raw material powder, will Put the powder, rare earth, and Nb powder into a ball mill for mixing and crushing, add absolute ethanol as a process control agent, put the wet mixed powder in a vacuum drying oven for drying, and dry it for later use; according to the volume ratio of 1:1 Measure the organic monomer hydroxyethyl acrylate and solvent toluene to prepare a premix, add 1.2 g / 100 ml of benzoyl peroxide to the premix and stir evenly; add the dry mixed powder to the premix, and add dropwise 2% oleic acid and stir evenly to form a slurry; add 0.15% dimethylaniline to the slurry and add ammonia water to adjust the pH to 7; remove the air bubbles by vacuuming and put the green body into a vacuum sintering furnace for Degumming and final sintering, the process is: degumming at 500 ℃ for...

Embodiment 2

[0026] Embodiment 2: weighing mass fraction is 60% TiC powder and 0.2% Ce, 0.2% Nb, 0.25% SiMgRe, 0.4% graphite powder, 8% carbonyl iron powder, Cr5Mo1V medium alloy cold working die steel matrix raw material powder, will Put the powder, rare earth, and Nb powder into a ball mill for mixing and crushing, add absolute ethanol as a process control agent, put the wet mixed powder in a vacuum drying oven for drying, and dry it for later use; according to the volume ratio of 1:2 Measure the organic monomer hydroxyethyl acrylate and solvent toluene to prepare a premix, add 0.6 g / 100 ml of benzoyl peroxide to the premix and stir evenly; add the dry mixed powder to the premix, and add dropwise 1% oleic acid and stir evenly to form a slurry; add 0.1% dimethylaniline to the slurry and add ammonia water to adjust the pH to 7.5; remove the air bubbles by vacuuming and put the green body into a vacuum low-pressure sintering furnace Degumming and final sintering are carried out. The process...

Embodiment 3

[0027] Embodiment 3: weighing mass fraction is 40% TiC powder and 0.25% Ce, 0.25% Nb, 0.3% SiMgRe, 0.5% graphite powder, 9% carbonyl iron powder, Cr4W2MoV medium alloy cold work die steel matrix raw material powder, will Put the powder, rare earth, and Nb powder into a ball mill for mixing and crushing, add absolute ethanol as a process control agent, put the wet mixed powder in a vacuum drying oven for drying, and dry it for later use; according to the volume ratio of 2:1 Measure the organic monomer hydroxyethyl acrylate and solvent toluene to prepare a premix, add 1.5 g / 100 ml of benzoyl peroxide to the premix and stir evenly; add the dry mixed powder to the premix, and add dropwise 3% oleic acid and stir evenly to form a slurry; add 0.2% dimethylaniline to the slurry and add ammonia water to adjust the pH to 8; remove the air bubbles by vacuuming and put the green body into a vacuum low-pressure sintering furnace Carry out degumming and final sintering, the process is: degu...

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Abstract

The invention relates to a method for preparing TiC medium alloy cold-working die steel-based steel-bonded hard alloy, comprising the following steps: weighing titanium carbide powder and medium-alloy cold-working die steel matrix powder according to the proportion, and putting the alloy powder into a ball mill Mixing and crushing are carried out, wherein anhydrous ethanol is added as a process control agent, after ball milling, the wet mixed powder is put into a vacuum drying oven for drying, and it is used for later use after drying. Add organic monomers and initiators to the solvent to prepare a premix; add additives to improve the fluidity and dispersibility of the slurry; add catalysts and pH regulators and stir evenly to obtain a slurry; inject the slurry into the casting mold and vacuumize Or vibration degassing, after the slurry is solidified and formed, the green body is put into a vacuum drying oven for drying, and the dried green body is degummed and sintered in a vacuum sintering furnace to prepare a steel-bonded hard alloy. On the basis of ensuring the macroscopic properties of the steel-bonded hard alloy, the invention has the advantages of simple process, low cost and easy preparation of parts with large size and complex shape.

Description

technical field [0001] The invention relates to a method for preparing TiC alloy cold-working die steel-based steel-bonded hard alloy, which belongs to the field of metal-based composite material preparation. Background technique [0002] Steel-bonded cemented carbide is a composite material with a ceramic phase and steel as a bonding matrix. Its performance is between ordinary cemented carbide and steel, and it has a series of other advantages, making it widely used in many fields. use. At present, the method of preparing this material is mainly powder metallurgy method, including pressing forming, cold isostatic pressing forming, injection molding, etc., followed by vacuum sintering as the final forming. The use of compression forming and cold isostatic pressing to prepare larger parts requires a lot of pressure and is powerless, and it is difficult to prepare parts with complex shapes. At the same time, when preparing composite materials with small ceramic grain size and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/02
CPCC22C33/0292C22C33/006
Inventor 王爱华丁家伟丁刚耿德英鹿薇薇鹿策施孟达陈志和朱坚
Owner 丹阳惠达模具材料科技有限公司
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