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A kind of graphene reinforced pre-alloyed diamond composite material and preparation method thereof

A composite material and graphene technology, applied in the field of materials science, can solve the problems of poor comprehensive mechanical properties, thermal damage of diamond, short service life, etc., and achieve the effect of high density, high sharpness and long service life

Active Publication Date: 2020-08-25
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the disadvantages of poor comprehensive mechanical properties and thermal damage of diamonds at high sintering temperatures, the matrix of traditional diamond-impregnated composite materials causes the existing drill bits to have problems such as low drilling efficiency and short service life. The purpose of the present invention is to provide A kind of graphene reinforced pre-alloyed diamond composite material and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) 1.6g of cetyltrimethylammonium bromide (CTAB) was added to 200mL distilled water, ultrasonically dispersed for 0.5h, CTAB was dissolved completely, and CTAB aqueous solution was obtained, and the color of CTAB aqueous solution changed from milky white to clear and transparent; Add 39g of iron-nickel pre-alloy powder into the CTAB aqueous solution and stir for 0.5h with an electric mixer to make the iron-nickel pre-alloy powder contact with CTAB completely; rinse the CTAB-modified iron-nickel pre-alloy powder with distilled water to avoid adding graphene oxide. , graphene oxide is directly electrostatically adsorbed and agglomerated in water containing more CTAB, while the CTAB film on the surface of the iron-nickel pre-alloyed powder is retained, so that the CTAB-modified iron-nickel pre-alloyed powder (not dried) is obtained. Add it into 150mL distilled water and stir it with an electric mixer;

[0024] (2) Weigh 0.39g of graphene oxide (1% of the mass of iron-nick...

Embodiment 2

[0030](1) 1.4g cetyltrimethylammonium bromide (CTAB) was added to 200mL distilled water, ultrasonically dispersed for 0.5h, CTAB was dissolved completely, and CTAB aqueous solution was obtained, and the color of CTAB aqueous solution changed from milky white to clear and transparent; Add 39g of iron-nickel pre-alloyed powder into the CTAB aqueous solution, and stir for 0.5h with an electric mixer, so that the iron-nickel pre-alloyed powder is in complete contact with CTAB. Rinse the iron-nickel pre-alloy powder modified by CTAB with distilled water, add the obtained CTAB-modified iron-nickel pre-alloy powder (not dried) into 150mL distilled water, and stir with an electric mixer;

[0031] (2) Weigh the graphene oxide of 0.195g graphene oxide (the quality is 0.5% of the iron-nickel pre-alloyed powder mass), add it to 50mL distilled water, and ultrasonically disperse for 1.5h, realize the deagglomeration of graphene oxide and in distilled water The uniform dispersion in, obtains...

Embodiment 3

[0036] (1) 1.2g of cetyltrimethylammonium bromide (CTAB) was added to 200mL distilled water, ultrasonically dispersed for 0.5h, CTAB was dissolved completely, and CTAB aqueous solution was obtained, and the color of CTAB aqueous solution changed from milky white to clear and transparent; Add 39g of iron-nickel pre-alloyed powder into the CTAB aqueous solution, and stir for 0.5h with an electric mixer, so that the iron-nickel pre-alloyed powder is in complete contact with CTAB. Rinse the iron-nickel pre-alloy powder modified by CTAB with distilled water, add the obtained CTAB-modified iron-nickel pre-alloy powder (not dried) into 150mL distilled water, and stir with an electric mixer;

[0037] (2) Weigh the graphene oxide of 0.0039g graphene oxide (the quality is 0.01% of the iron-nickel pre-alloyed powder mass), add it into 50mL distilled water, ultrasonically disperse for 1.5h, realize the deagglomeration of graphene oxide and the The uniform dispersion in, obtains the aqueou...

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Abstract

The invention discloses a graphene reinforced prealloyed diamond composite material and a preparation method thereof, belonging to the field of materials science. The diamond composite material is composed of prealloyed matrix powder, graphene oxide and diamond abrasive particles, and the prealloyed matrix powder is composed of iron-nickel prealloyed powder, Mn manganese powder and WC tungsten carbide powder with a mass ratio of 13: 1: 6; Compared with the traditional metal simple substance powder when sintering impregnated diamond materials, the sintering temperature of the iron-nickel prealloyed powder used in the invention is reduced obviously, so as to avoid the thermal damage of the diamond during the sintering process effectively and improve the sharpness of a diamond tool. An electrostatic self-assembly method is adopted, the graphene oxide is adsorbed on the surface of the iron-nickel prealloyed powder, and then graphene oxide is uniformly mixed with the manganese powder, the tungsten carbide powder and the diamond abrasive particles, and the graphene oxide is reduced to graphene during the hot pressing sintering process. The graphene is added to the prealloyed matrix powder to improve the compactness, hardness, oxidation resistance and friction properties of the matrix materials significantly.

Description

technical field [0001] The invention relates to an impregnated diamond composite material and a preparation method thereof, in particular to a graphene-reinforced pre-alloyed diamond composite material and a preparation method thereof, belonging to the field of materials science. Background technique [0002] Diamond-impregnated drill bits are a typical application of diamond-impregnated composite materials. It mainly grinds rock formations through many and small hard points (diamonds), and is widely used for drilling in hard, dense and abrasive formations. The impregnated diamond composite material is mainly composed of matrix material and diamond, and its performance determines the drilling efficiency and service life of the drill bit. The matrix system of traditional diamond-impregnated composite materials mainly includes three categories: tungsten carbide-based matrix, iron-based matrix and low tungsten carbide-low viscosity matrix. Since the binder in the matrix is ​​...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C26/00C22C1/05C22C1/10
Inventor 刘宝昌戴文昊张帅李思奇朱月陈朝然
Owner JILIN UNIV