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Preparation method of TiC high-alloy hot work die steel based steel bond hard alloy

A technology of steel-bonded hard alloy and hot work die steel, which is applied in the field of metal matrix composite material preparation, to achieve the effects of uniformity and compactness of the structure, uniform pore size distribution, and short forming cycle

Inactive Publication Date: 2017-05-17
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 high-alloy hot work 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, 3Cr2W8V high-alloy hot 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 2 h...

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, 7% carbonyl iron powder, 5Cr4Mo3SiMnVAl high-alloy hot 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 1:2 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 proces...

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, 8% carbonyl iron powder, 4Cr4W5Mo2V high-alloy hot 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: degum...

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Abstract

The invention relates to a preparation method of TiC high-alloy hot work die steel based steel bond hard alloy. The preparation method comprises the following steps: weighing titanium carbide powder and high-alloy hot work die steel based body powder in proportion; mixing and pulverizing alloy powder in a ball mill, wherein added anhydrous ethanol is a process control agent; after ball-milling is finished, drying wet mixed powder in a vacuum drying box for subsequent use; adding organic monomer and an initiator in a solvent to prepare premixed liquid; adding an additive which improves fluidity and dispersibility of slurry; adding a catalyst and a pH regulator, and evenly stirring to obtain the slurry; injecting the slurry into a gel-casting mold and vacuumizing or shaking to remove air; after the slurry is solidified and formed, drying a blank in the vacuum drying box; and carrying out integral degumming and sintering on the dried blank in a vacuum sintering furnace to prepare the steel bond hard alloy. The preparation method of the TiC high-alloy hot work die steel based steel bond hard alloy has the advantages of simple process, low cost and easiness in preparation of large parts in complicated shapes on the basis of the macroscopic performance of the steel bond hard alloy.

Description

technical field [0001] The invention relates to a method for preparing a TiC high-alloy hot work 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 ...

Claims

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Application Information

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IPC IPC(8): C22C29/10C22C30/00C22C32/00C22C33/02C22C1/05
CPCC22C29/10C22C1/05C22C1/051C22C30/00C22C32/0052C22C32/0084C22C33/006C22C33/02
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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