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A kind of preparation method of microwave fast synthesis cbn abrasive tool vitrified bond

A technology of vitrified bond and microwave 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 high sintering temperature, low strength of vitrified bond, poor fatigue resistance, etc., and reach the reaction temperature Low, short reaction time, high bending strength effect

Active Publication Date: 2017-10-27
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 belongs to the field of binder preparation and relates to a preparation method of a vitrified binder for CBN. The preparation method comprises the following steps: a. Taking 45% to 70% of silicic acid or silicon dioxide, 3% to 10% of aluminum hydroxide or aluminum oxide, and 5% to 15% of anhydrous sodium carbonate by mass percentage Or sodium oxide and 5-20% boric acid or boron trioxide are mixed evenly, and after grinding, pass through a 200-300 mesh sieve to obtain a mixture; The conditions are: heat up to 1300-1500°C at a rate of 10°C / min and then smelt for 2-5 hours; c, dry the product obtained in step b at 100-150°C for 4-8 hours, grind, and pass through a 200-300 mesh sieve , to obtain a basic vitrified bond; d, pressing the basic vitrified bond obtained in step c into a blank with a press, and sintering in a microwave sintering furnace to obtain a vitrified bond of the present invention. The method has the characteristics of low reaction temperature, short reaction time, low production cost, energy saving, etc., and is easy for industrialized 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 Patents(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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