Preparation method for ceramic binder used for rapid synthesis of CBN abrasive tools by microwave method

A technology of vitrified bond and synthesis method, which is applied in the field of rapid synthesis of vitrified bond for CBN abrasive tools by microwave method, which can solve the problems of poor fatigue resistance, high sintering temperature, and low strength of vitrified bond, and achieve bending resistance The effect of high strength, low reaction temperature and short reaction time

Active Publication Date: 2015-11-25
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The traditional atmospheric pressure sintering method requires high sintering temperature to prepare vitrified bond, and the obtained vitrified bond has low strength, poor impact resistance and fatigue resistance. Research low-temperature high-strength vitrified bond to realize low-temperature firing of abrasive tools

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take by weight 34.8g of silicon dioxide, 9.36g of aluminum hydroxide, 12.4g of sodium oxide and 19.8g of boric acid of analytical grade, after fully mixing, pass through a 200 mesh sieve, and then raise the mixture to 1500 at a certain heating rate. ℃, and keep warm for 2~5h. After water cooling, drying, crushing and ball milling, the basic vitrified bond is obtained. After pressing, drying, microwave firing and other processes, the refractoriness and flexural strength of the binder were measured respectively. The results show that the refractoriness of the binder is 500~600℃, and the flexural strength is 55~110MPa.

Embodiment 2

[0026] Weigh 61.8g of silicic acid, 11.5g of aluminum hydroxide, 17.0g of anhydrous sodium carbonate and 27.5g of diboron trioxide of analytical grade by weight. Raise to 1400°C and keep warm for 2~5h. After water cooling, drying, crushing and ball milling, the basic vitrified bond is obtained. After pressing, drying, microwave firing and other processes, the refractoriness and flexural strength of the binder were measured respectively. The results show that the refractoriness of the binder is 500~600℃, and the flexural strength is 55~110MPa.

Embodiment 3

[0028] Take by weight 53.65g of silicon dioxide, 7.66g of aluminum oxide, 12.25g of sodium oxide and 20.86g of boric acid of analytical purity, after fully mixing, pass through a 200 mesh sieve, and then the mixture is raised to 1300°C, and keep it warm for 2~5h. After water cooling, drying, crushing and ball milling, the basic vitrified bond is obtained. After pressing, drying, microwave firing and other processes, the refractoriness and flexural strength of the binder were measured respectively. The results show that the refractoriness of the binder is 500~600℃, and the flexural strength is 55~110MPa.

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Abstract

The invention relates to a preparation method for a ceramic binder used for rapid synthesis of CBN abrasive tools by a microwave method, belonging to the field of preparation of binders. The preparation method comprises the following steps: a, by mass, weighing 45 to 70% of silica acid or silicon dioxide, 3 to 10% of aluminium hydroxide or aluminium oxide, 5 to 15% of anhydrous sodium carbonate or sodium oxide and 5 to 20% of boric acid or diboron trioxide, carrying out uniform mixing and grinding, and carrying out sieving with a 200-to-300-mesh sieve so as to prepare a mixed material; b, melting the mixed material prepared in the step a and then carrying out water quenching, wherein melting conditions are as follows: carrying out heating to 1300 to 1500 DEG C with a rate of 10 DEG C / min and then carrying out melting for 2 to 5 h; c, drying a product prepared in the step b at 100 to 150 DEG C for 4 to 8 h, then carrying out grinding, and carrying out sieving with the 200-to-300-mesh sieve so as to prepare a basic ceramic binder; and d, subjecting the basic ceramic binder prepared in the step c to pressing molding into a blank with a presser, and carrying out sintering with a microwave sintering furnace so as to prepare the ceramic binder. The method provided by the invention has the characteristics of low reaction temperature, short reaction time, low production cost, energy conservation, etc., and is easy to realize industrial production.

Description

technical field [0001] The invention provides a preparation method for quickly synthesizing a vitrified bond for CBN grinding tools by a microwave method, and belongs to the technical field of bond preparation. Background technique [0002] Vitrified bond has controllable porosity, good thermal stability and chemical stability, and is widely used in the processing and molding of CBN abrasive tools for high-speed, high-efficiency, and high-precision grinding. Ceramic bond CBN grinding tools not only have sharp cutting, small grinding force, high production efficiency, long service life, easy shaping and sharpening, high grinding precision, but also low workpiece temperature during grinding, which can eliminate residual tensile stress. The performance of the vitrified bond is directly related to whether the excellent performance of the CBN abrasive grains can be fully exerted, which ultimately affects the grinding effect of the CBN grinding wheel. Therefore, vitrified bond is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/14C04B35/622
Inventor 赵志伟陈飞晓胡文萌黄庆飞申皓
Owner HENAN UNIVERSITY OF TECHNOLOGY
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