Preparation method for VC medium alloy hot-working 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, can solve the problems of difficult forming and sintering, achieve short forming cycle, and be conducive to the uniformity and compactness of the structure and the distribution of pore size uniform effect

Inactive Publication Date: 2017-06-20
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 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

[0033] Embodiment 1: weighing mass fraction is 50% VC powder and 0.10% Ce, 0.05% Nb, 0.1% SiMgRe, 0.3% graphite powder, 6% carbonyl iron powder, 4Cr5MoSiV1 medium alloy hot work die steel matrix raw material powder, will Put the raw material 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 into a vacuum drying oven for drying, and dry it for later use; measure according to the volume ratio of 1:1 Take 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 drop 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 ...

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, 8% carbonyl iron powder, 4Cr5W2VSi medium alloy hot work die steel matrix raw material powder, will Put the raw material 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 1:2 Take 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 simultaneously add 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 for Degumming and final sintering, th...

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, 4Cr3Mo3SiV1 medium alloy hot work die steel matrix raw material powder, will Put the raw material 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:...

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Abstract

The invention relates to a preparation method for a VC medium alloy hot-working die steel based steel bond hard alloy. The preparation method comprises the following steps that carbonized titanium powder and medium alloy hot-working die steel matrix powder are weighed in proportion, and the alloy power is placed into a ball mill for mixing and crushing, wherein absolute ethyl alcohol is added as a process control agent, wet mixing powder is placed into a vacuum drying box for drying after ball milling, and drying is conducted for later use; organic monomers and an initiating agent are added into a solvent for premixed solution preparation; an addition agent for improving fluidity and dispersity of slurry is added; catalysts and a pH adjusting agent are added and evenly stirred, and the slurry is obtained; and the slurry is injected into an injection condensing die for vacuumizing or vibration degasification, a blank is placed into the vacuum drying box for drying after the slurry is solidified and formed, the dried blank is subjected to integrated degumming and sintering in a vacuum sintering furnace, and thus the steel bond hard alloy is prepared. On the basis of the condition that macro-performance of the steel bond hard alloy is guaranteed, the preparation method for the VC medium alloy hot-working die steel based steel bond hard alloy has the advantages that the technique is simple, cost is low, and parts with large dimensions and complex shapes are easy to prepare.

Description

technical field [0001] The invention relates to a method for preparing a steel-based steel-bonded hard alloy of an alloy hot work 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.). In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/02
CPCC22C33/0292C22C33/006
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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