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Preparing method for TiC matrix steel base steel bond hard alloy

A technology of steel bonding cemented carbide and matrix

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

[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 TiC matrix 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

[0025] Example 1: Weigh TiC powder with a mass fraction of 50% and 0.10% Ce, 0.05% Nb, 0.1% SiMgRe, 6Cr4W3Mo2VNb matrix steel matrix raw material powder, put the powder, rare earth and Nb into a ball mill for mixing and crushing , where absolute ethanol is added as a process control agent, the wet mixed powder is put into a vacuum drying oven for drying, and it is used after drying; the organic monomer hydroxyethyl acrylate and the solvent toluene are measured according to a volume ratio of 1:1 to prepare a premixed liquid, Add 1.2 g / 100ml of benzoyl peroxide to the premix and stir evenly; add the dry mixed powder to the premix, add 2% oleic acid dropwise and stir evenly to form a slurry; Add 0.15% dimethylaniline and add ammonia water to adjust the pH to 7; remove the air bubbles by vacuuming, put the green body into a vacuum sintering furnace for degumming and final sintering, the process is: degumming at 500 °C for 2 h, The final sintering is carried out at 1450 ℃ for 2 hou...

Embodiment 2

[0026] Embodiment 2: weighing mass fraction is 60% TiC powder and 0.2% Ce, 0.2% Nb, 0.25% SiMgRe, 0.3% graphite powder, 5% carbonyl iron powder, 6W6Mo5Cr4V matrix steel matrix raw material powder, described powder and Rare earth and Nb powders are mixed and crushed in a ball mill, and absolute ethanol is added as a process control agent, and the wet mixed powder is dried in a vacuum drying oven. Prepare a premix with solid hydroxyethyl acrylate and solvent toluene, 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% oil 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 The sintering process is as follows: degumming at 500 °C for 1 h, and final sintering at 1400 °C for 2 h; finally cooling with the...

Embodiment 3

[0027] Embodiment 3: weighing mass fraction is 40% TiC powder and 0.25% Ce, 0.25% Nb, 0.3% SiMgRe, 0.4% graphite powder, 8% carbonyl iron powder, 7Cr7Mo3V2Si matrix steel matrix raw material powder, described powder and Rare earth and Nb powders are mixed and crushed in a ball mill, and absolute ethanol is added as a process control agent, and the wet mixed powder is dried in a vacuum drying oven, and the dried powder is used for later use; according to the volume ratio of 2:1, organic single Prepare a premixed solution with solid hydroxyethyl acrylate and solvent toluene, add 1.5 g / 100 ml of benzoyl peroxide to the premixed solution and stir evenly; add the dry mixed powder to the premixed solution, and simultaneously add 3% oil acid and stir evenly to form a slurry; add 0.2% dimethylaniline to the slurry and add ammonia 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 The si...

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Abstract

The invention relates to a preparing method for a TiC matrix steel base steel bond hard alloy. The preparing method includes the following steps that titanium carbide powder and matrix 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 method for preparing a TiC matrix steel-based 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 materials with small ceramic grain size and high content,...

Claims

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Application Information

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