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

A technology of steel-bonded hard alloy and cold-working die steel, which is applied in metal processing equipment, transportation and packaging, etc., can solve the problems of difficult forming and sintering, and achieve short forming cycle, uniform structure and density, stable and reliable performance 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

[0010] 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 VC 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

[0033] Example 1: Weigh 50% VC powder 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 process is: degumming at ...

Embodiment 2

[0034] Example 2: Weigh 60% VC powder 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 final sintering. The process ...

Embodiment 3

[0035] Example 3: Weighing 40% VC powder and 1.5% Ni, 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 into a vacuum drying box for Dry and dry for later use; measure the organic monomer hydroxyethyl acrylate and the solvent toluene according to the volume ratio of 2:1 to prepare a premix, add 1.5 g / 100 ml of benzoyl peroxide to the premix and stir evenly; dry The mixed powder is added to the premixed liquid, and 3% oleic acid is added dropwise and stirred evenly to form a slurry; 0.2% dimethylaniline is added to the slurry and ammonia water is added to adjust the pH to 8; the vacuum method is used to remove After bubbling, put the green body into a vacuum low-pressure sinteri...

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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 VC steel bonded hard alloy. The preparation method comprises the following steps: titanium carbide powder and medium-alloy hot work die steel matrix powder are weighed in proportion; alloy powder is put in a ball mill for mixing and crushing, wherein 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 uniformly stirring to obtain slurry; the slurry is injected in an injection condensation 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 the 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 easy 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 VC 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. In recent years, in order to obtain some special structures and properties of steel-bonded hard alloys, and to alleviate the problems of the increasing shortage of W and Co, the main resources of traditional hard alloy materials, more extensive and in-depth research has been carried out on steel-bonded hard alloys at home and abroad. Research, especially the research on adding different new hard phases (such as adding A1203, TiN, NbC, TiCN, TiB2, M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/06C22C32/00C22C30/00C22C1/05C22C1/10B22F1/00C22C38/46C22C38/48C22C38/44C22C38/04C22C38/02C22C33/02
CPCC22C1/05C22C1/051C22C29/06C22C29/067C22C30/00C22C32/0052C22C33/0235C22C33/0292C22C38/002C22C38/005C22C38/02C22C38/04C22C38/44C22C38/46C22C38/48B22F1/107
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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