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Toughening and reinforcing method for ceramic bonding agent for superhard grinding tool

A technology of vitrified bond and superhard abrasive tools, which is applied in abrasives, manufacturing tools, metal processing equipment, etc. It can solve the problems of limited tensile strength and low brittleness, and achieve the effect of uniform structure, simple equipment and simple experimental process

Inactive Publication Date: 2018-12-21
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The brittleness and low tensile strength of vitrified bond severely limit its application in the field of high-speed and ultra-high-speed grinding. big gap

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] a. Measure 10 mL of deionized water and place it in a 50 mL beaker 1 and add 3-5 drops of surfactant.

[0029] b. Weigh 100g of vitrified bond agent and gradually add it to beaker 1 in small amounts for several times, add 3-5 drops of defoamer and stir with a glass rod for 30min, seal it with a sealing film and set aside.

[0030] c. Add 1-2 drops of binder to the above-mentioned vitrified bond slurry and stir it with a glass rod for 40 minutes, then place it in a gel injection mold for molding, and place it at room temperature for 20 minutes and then move the green body to 60°C After drying in a drying oven, a ceramic green body is obtained.

[0031] e. Place the above ceramic body in a muffle furnace, raise the temperature from room temperature to 250°C at a heating rate of 5°C / min and keep it warm for 1 hour, then raise the temperature to 250°C at a heating rate of 4.5°C / min and keep it warm for 2 Hours, the temperature was raised to 700°C at a heating rate of 5.5°C...

Embodiment 2

[0033] a. Measure 10 mL of deionized water into beaker 1 with a specification of 50 mL and add 3 or 5 drops of surfactant.

[0034] b. Weigh 100g of vitrified bond agent and gradually add it to beaker 1 in small amounts several times, add 3 drops or 5 drops of defoamer and stir with a glass rod for 30 minutes, seal it with a sealing film and set aside.

[0035] c. Measure 2ml of deionized water and place them in three other 25mL beakers 2, 3, and 4, and add 0.5g of carbon fiber, 0.5g of silicon carbide whiskers, and 0.5g of graphene oxide into the three beakers, respectively. In the beaker, add 1 drop or 2 drops of surfactant and stir for 25min under a magnetic stirrer.

[0036] d. Place the beaker in the above step c in an ultrasonic cleaner for ultrasonic dispersion for 2-3 hours.

[0037] e. Pour the beaker 2 in the above step d into the beaker 4 for mixing, add 1 drop or 2 drops of defoamer and stir for 1.5 hours under a magnetic stirrer.

[0038] f. Pour the beaker 3 in...

Embodiment 3

[0043] a. Measure 8mL of deionized water into beaker 1 with a specification of 50mL and add 3 or 5 drops of surfactant.

[0044] b. Weigh 80g of vitrified bond agent and gradually add it to beaker 1 in small amounts and several times, add 3 drops or 5 drops of defoamer and stir with a glass rod for 30 minutes, seal it with a sealing film and set aside.

[0045] c. Measure 2ml of deionized water and place them in three other 25mL beakers 2, 3, and 4, and add 0.3g of carbon fiber, 0.5g of silicon carbide whiskers, and 0.3g of graphene oxide into the three beakers, respectively. In the beaker, add 1 drop or 2 drops of surfactant and stir for 25min under a magnetic stirrer.

[0046] d. Place the beaker in the above step c in an ultrasonic cleaner for ultrasonic dispersion for 2-3 hours.

[0047] e. Pour the beaker 2 in the above step d into the beaker 4 for mixing, add 1 drop or 2 drops of defoamer and stir for 1.5 hours under a magnetic stirrer.

[0048]f. Pour the beaker 3 in ...

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Abstract

The invention discloses a toughening and reinforcing method for a ceramic bonding agent, and belongs to the technical field of ceramic grinding tools. The toughening and reinforcing method comprises the main steps that the ceramic bonding agent is gradually added into a beaker containing deionized water, and a mixture is stirred with a glass rod to be sealed for standby application; carbon fibers,silicon carbide whiskers and graphene oxide are respectively added into the beaker containing the deionized water, after a surface active agent is added for dispersing, mixtures are mixed together, an antifoaming agent is added, and stirring with a magnetic stirrer is carried out; an antifoaming agent is dropped into mixed final mixed slurry and ceramic slurry, a binder is added after stirring with the magnetic stirrer, and a ceramic body is manufactured; and the ceramic body is naturally cooled to the room temperature after sintered in a muffle furnace. The toughening and reinforcing methodhas the beneficial effects that the experiment process is simple, and needed equipment is simple; the structure of the ceramic body prepared after uniform and dispersed slurry forming is more even; and after the carbon fiber-silicon carbide whisker-graphene oxide is added, whisker-shaped binding agent bridge joint structures are evenly distributed around ceramic binding agent particles, and toughening and reinforcing are carried out on the ceramic bonding agent.

Description

Technical field [0001] The patent of the present invention relates to the technical field of ceramic abrasive tools, in particular to a method for strengthening vitrified bonds for superhard abrasive tools. Background technique [0002] Today's grinding technology is gradually developing towards high-speed, high-efficiency, and high-precision grinding. Therefore, the research and development and preparation of various grinding tools are aimed at not only ensuring high-speed requirements, but also having good grinding performance and service life. [0003] Superhard abrasives mainly include diamond abrasives and cBN abrasives, which are widely used in aerospace, mold manufacturing, electronic devices, optical materials, medical devices, automobile production, stone processing and other fields. Vitrified bond superhard abrasives occupy an important position due to their high strength, good heat resistance, sharp cutting, high grinding efficiency, less clogging during grinding,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D3/14
CPCB24D3/14
Inventor 栗正新王丽晶余威
Owner HENAN UNIVERSITY OF TECHNOLOGY
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