Graphene-modified hard alloy degreasing and sintering process

A technology of graphene modification and cemented carbide, which is applied in the field of sintering process and cemented carbide degreasing, which can solve problems such as surface cracking, incomplete degreasing, and bubbles, and achieve the effect of improving tissue uniformity and uniform carbon content

Inactive Publication Date: 2018-05-15
SUZHOU OUMEIKE CARBIDE TOOL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the degreasing process, only the thermal degreasing process is used for degreasing, and there will be some defects such as incomplete degreasing, surface cracking, and air bubbles.

Method used

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with specific embodiments.

[0027] A kind of graphene-modified cemented carbide degreasing, sintering process, comprises the steps:

[0028] (1) Evenly disperse the graphene in the ethanol solution, wherein the dispersion process used in the graphene dispersion process can be any one of ultrasonic, grinding, ball milling, and high-speed shearing processes.

[0029] (2) Mix cemented carbide powder with graphene ethanol solution to achieve good mixing of graphene and cemented carbide; graphene can be single-layer, few-layer and multi-layer graphene, and the amount of graphene is hard Quality alloy powder 2.5-3.5%.

[0030] (3) Powder drying, pour the ethanol solution mixed with graphene and cemented carbide powder into the dryer for water evaporation and drying.

[0031] (4) Cool the powder dried in step (3) and form an ingot.

[0032] (5) Ball milling: pulverize the ingot formed in step (4) and perf...

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Abstract

The invention discloses a graphene-modified hard alloy degreasing and sintering process. The process comprises the following steps that (1), graphene is evenly dispersed into an ethanol solution; (2),hard alloy powder and the graphene ethanol solution are mixed, and the graphene and the hard alloy are well mixed; (3), power is dried, wherein the ethanol solution mixed with the graphene and the hard alloy powder is poured into a drying machine and subjected to evaporation of water and drying; (4), the powder dried in the third step is cooled, and a cast ingot is formed; (5), ball milling is conducted, wherein the cast ingot formed in the fourth step is smashed and then ball-milled, the ball milling rotating speed ranges from 60 r / m to 80 r / m, and ball milling is conducted for 48-72 hours;(6), pelleting is conducted, wherein the ball-milled material is added to a pelleting machine, a molding agent is added, and pelleting is conducted; (7), mold pressing forming is conducted; (8), degreasing is conducted; and (9), sintering forming is conducted.

Description

technical field [0001] The invention relates to a graphene-modified hard alloy degreasing and sintering process, belonging to the technical field of hard alloy production technology. Background technique [0002] With the rapid growth of China's automobile industry and the continuous expansion of CNC centers and machining centers in various fields of machining, the demand for high-performance, high-precision, and high value-added cemented carbide products will continue to increase. By 2015, my country will only be in the automotive industry. The cost of the required cemented carbide tools will reach 10 billion yuan. [0003] The company's first application for invention patent number is: 201210246491.9, which introduces a graphene-modified cemented carbide, its preparation process and application. Through the improvement of the process, the graphene is quickly reduced in the subsequent sintering process. , and react with the matrix cemented carbide to adjust the carbon conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/10C22C29/00B22F3/10
CPCC22C1/051B22F3/1025C22C29/00
Inventor 王永富李友军徐金海
Owner SUZHOU OUMEIKE CARBIDE TOOL
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