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Preparing method for VC high alloy cold work die steel base steel bond 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., to achieve the effects of improving uniformity, uniform pore size distribution, and shortening sintering time

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 high-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 0.2% Ce, 0.2% Nb, 0.25% SiMgRe, 0.3% graphite powder, 5% carbonyl iron powder, Cr12 high 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 1:1 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 ho...

Embodiment 2

[0034] Embodiment 2: weighing mass fraction is 60% VC powder and 0.2% Ce, 0.2% Nb, 0.25% SiMgRe, 0.4% graphite powder, 7% carbonyl iron powder, Cr12MoV high 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 is: d...

Embodiment 3

[0035] Embodiment 3: weighing mass fraction is 40% VC powder and 0.25% Ce, 0.25% Nb, 0.3% SiMgRe, 0.55 graphite powder, 8% carbonyl iron powder, Cr12Mo1V1 high alloy cold work die steel matrix raw material powder, all Put the above 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; measure according to the volume ratio of 2:1 Take 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 drop 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 for Degumming and final sintering, the process is: degumming...

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Abstract

The invention relates to a preparing method for a VC high alloy cold work die steel base steel bond hard alloy. The preparing method includes the following steps that titanium carbide powder and high alloy powder cold work die steel matrix powder are weighed according to the proportion, alloy powder is put into a ball grinding machine to be mixed and smashed, added absolute ethyl alcohol is a process control agent, and the wet mixed powder is put into a vacuum drying box to be dried after ball grinding and is used for standby use after drying; an organic monomer and an initiator are added into a solvent to prepare pre-mixed liquid; an additive improving slurry fluidity and dispersity is added; a catalyst and a pH modifier are added and are evenly stirred, and slurry is obtained; and the slurry is injected into an injection and coagulation die, vacuum suction or vibration gas removing is conducted, after the slurry is cured to be formed, a blank is put into the vacuum drying box to be dried, the dried blank is subjected to integrated degumming and sintering in a vacuum sintering furnace, and the steel bond hard alloy is prepared. The preparing method has the beneficial effects that the technology is simple, the cost is relatively low, and parts large in size and complex in shape are easy to prepare on the basis that the macro performance of the steel bond hard alloy is ensured.

Description

technical field [0001] The invention relates to a preparation method of VC high-alloy cold mold steel-based steel-bonded hard alloy, belonging 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.). In recent ye...

Claims

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Application Information

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IPC IPC(8): C22C29/10C22C30/00C22C33/02C22C32/00C22C1/05C22C1/10B22F1/00B22F3/22
CPCC22C1/05C22C1/051C22C29/067C22C29/10C22C30/00C22C32/0052C22C33/0207C22C33/0292B22F3/22B22F1/107
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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