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Preparation method for VC medium alloy cold work die steel based 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 the effects of short forming cycle, improved interface strength, and improved uniformity

Inactive Publication Date: 2017-06-09
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 VC 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

[0033] Embodiment 1: weighing mass fraction is 50% VC 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

[0034] Embodiment 2: the weighing mass fraction is 60% VC powder and 0.2% Ce, 0.2% Nb, 0.25% SiMgRe, 0.4% graphite powder, 8% carbonyl iron powder, Cr5Mo1V 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 1:2 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

[0035] Embodiment 3: weighing mass fraction is 40% VC 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: degum...

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PUM

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Abstract

The invention relates to a preparation method for VC medium alloy cold work die steel based steel bonded hard alloy. The method comprises the following steps that titanium carbide powder and medium alloy cold work die steel substrate powder are weighed proportionally, alloy powder is put into a ball mill to be mixed and crushed, absolute ethyl alcohol is added to be used as a process control agent, after ball milling, the wet mixed powder is put into a vacuum drying oven to be dried, and the powder is used for standby use after being dried; organic monomers and an initiator are added into a solvent for preparing a pre-mixed solution; an additive for improving liquidity and dispersity of slurry is added; a catalyst and a pH conditioning agent are added, even stirring is conducted, and the slurry is obtained; and the slurry is poured into a gelcasting mold, vacuumizing or vibrating degassing is conducted, after the slurry is solidified and molded, a blank is put into the vacuum drying oven to be dried, the dried blank is subjected to integral degumming and sintering in vacuum sintering furnace, and the steel bonded hard alloy is prepared. On the basis that the macro-performance of the steel bonded hard alloy is ensured, the method has the advantages that the process is simple, the cost is low, and large-sized parts in complex shapes can be prepared easily.

Description

technical field [0001] The invention relates to a method for preparing a steel-based steel-bonded hard alloy of an alloy cold-working die in VC, and 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, Mo2FeB2, Mo2C, Cr3C2, VC, NV, etc.)....

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/22B22F3/10C22C1/05C22C30/00C22C32/00C22C29/06C22C33/02
CPCC22C1/051C22C29/067C22C30/00C22C32/0047C22C33/0228C22C33/0292B22F3/1021B22F3/225B22F1/107
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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