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Preparation method of improved chromium-tungsten-manganese low alloy cold-work die steel base TiC steel bonded hard alloy

A technology of steel-bonded cemented carbide and cold-work die steel, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of difficulty in forming and sintering, and achieve the advantages of short forming cycle, stable and reliable performance, and improved material reliability. Effect

Inactive Publication Date: 2017-04-26
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 improved chromium-tungsten-manganese low-alloy cold-working die steel-based TiC steel-bonded carbide 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] Example 1: Weigh TiC powder with a mass fraction of 50% and 0.7% Ni, 0.10% Ce, 0.05% Nb, 0.1% SiMgRe, 0.3% graphite powder, 6% carbonyl iron powder, CrWMn chromium tungsten manganese low alloy cold work Die steel matrix raw material powder, put the raw material powder and rare earth, Ni, 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 backup Use; According to the volume ratio of 1:1, measure the organic monomer hydroxyethyl acrylate and the solvent toluene to prepare the premix, add 1.2 g / 100 ml of benzoyl peroxide to the premix and stir well; add the dry mixed powder Add 2% oleic acid dropwise to the premix 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 air bubbles by vacuuming The body is placed in a vacuum sintering furnace for degumming and final sintering. The ...

Embodiment 2

[0026] Example 2: Weigh TiC powder with a mass fraction of 60% and 1.0% Ni, 0.2% Ce, 0.2% Nb, 0.25% SiMgRe, 0.4% graphite powder, 8% carbonyl iron powder, 9CrWMn chromium tungsten manganese low alloy cold work Die steel matrix raw material powder, put the raw material powder and rare earth, Ni, 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 backup Use; According to the volume ratio of 1:2, measure the organic monomer hydroxyethyl acrylate and the solvent toluene to prepare the premix, add 0.6 g / 100 ml of benzoyl peroxide to the premix and stir well; add the dry mixed powder At the same time, add 1% oleic acid dropwise 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 air bubbles by vacuuming The body is put into a vacuum low-pressure sintering furnace for degumming and fina...

Embodiment 3

[0027] Example 3: Weigh TiC powder with a mass fraction of 40% and 1.2% Ni, 0.25% Ce, 0.25% Nb, 0.3% SiMgRe, 0.5% graphite powder, 9% carbonyl iron powder, CrWMn chromium tungsten manganese low alloy cold work Die steel matrix raw material powder, put the raw material powder and rare earth, Ni, 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 backup Use; According to the volume ratio of 2:1, measure the organic monomer hydroxyethyl acrylate and the solvent toluene to prepare the premix, add 1.5 g / 100 ml of benzoyl peroxide to the premix and stir well; add the dry mixed powder Add 3% oleic acid dropwise to the premixed solution 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 air bubbles by vacuuming The body is put into a vacuum low-pressure sintering furnace for degumming and...

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Abstract

The invention relates to a preparation method of an improved chromium-tungsten-manganese low alloy cold-work die steel base TiC steel bonded hard alloy. The preparation method comprises the following steps: titanium carbide powder and chromium-tungsten-manganese low alloy cold-work die steel matrix powder are weighed in proportion; alloy powder is put in a ball mill for mixing and crushing; anhydrous ethanol is added as a process control agent; and after ball milling, wet mixed powder is put in a vacuum drying box for drying for future use; an organic monomer and an initiator are added in solvent to prepare premixed liquid; an additive for improving the slurry fluidity and dispersibility is added; a catalyst and a pH adjusting agent are added for uniform stirring to obtain slurry; the slurry is injected in an injection solidification mold for vacuumizing or vibration degassing; after the slurry is formed by curing, a blank is put in the vacuum drying box for drying; and the dried blank is integrally degummed and sintered in a vacuum sintering furnace to prepare the steel bonded hard alloy. On the basis of guaranteeing macro-performances of the steel bonded hard alloy, the preparation method has the advantages of simple process, lower cost and easiness in preparation of large-size and complex-shape parts.

Description

technical field [0001] The invention relates to a method for preparing an improved chromium-tungsten-manganese low-alloy cold-working die steel-based TiC 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/10C22C30/00C22C32/00C22C33/02C22C38/02C22C38/04C22C38/44C22C38/48C22C38/50C22C1/05B22F1/00C22C1/10
CPCC22C1/05C22C1/051C22C29/067C22C29/10C22C30/00C22C32/0052C22C33/0207C22C33/0235C22C33/0292C22C38/002C22C38/005C22C38/02C22C38/04C22C38/44C22C38/48C22C38/50B22F1/107
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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