A kind of low temperature ceramic metal composite bond for abrasive tool and preparation method thereof

A composite bond, ceramic bond technology, applied in metal processing equipment, grinding/polishing equipment, abrasives, etc., can solve the problems of not too ideal composite effect, poor physical and chemical compatibility, etc., to improve the wetting condition , performance improvement, uniform structure effect

Active Publication Date: 2021-07-27
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used preparation method in the field of abrasive tools is to add metal or metal alloy to the vitrified bond by mechanical mixing to obtain a ceramic-metal composite bond. The physical and chemical compatibility is relatively poor, resulting in a composite effect that is not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Its technical scheme is: low-temperature vitrified bond powder 92% (volume percentage), nickel-phosphorus alloy 8%.

[0027] The raw material of low temperature vitrified bond is: silicon dioxide (SiO 2 ) 48%, alumina (Al 2 o 3 ) 6%, sodium carbonate (Na 2 CO 3 ) 6%, lithium carbonate (Li 2 CO 3 ) 5%, zirconia (ZrO 2 ) 2%, clay (Hydrotalcite) 8%, boric acid (H 3 BO 3 ) 25%.

[0028] The raw material of electroless plating solution is: nickel sulfate (NiSO 4 ) 30g / L, sodium hypophosphite (NaH 2 PO 2 ) 25g / L, sodium citrate (Na 3 C 6 h 5 o 7 2H 2 O) 25g / L, thiourea (CH 4 N 2 S) 0.001g / L.

[0029] The sintering temperature is 680°C, the pressure is 2MPa, and the pressure is maintained for 3min. The low-temperature ceramic-metal bond prepared has a flexural strength of 120~140MPa and an impact strength of 2~3kJ / m 2 , hardness 120~122HRB.

Embodiment 2

[0031] Its technical scheme is: low-temperature vitrified bond powder 92% (volume percentage), nickel-phosphorus alloy 8%.

[0032] The raw material of low temperature vitrified bond is: silicon dioxide (SiO 2 ) 48%, alumina (Al 2 o 3 ) 6%, sodium carbonate (Na 2 CO 3 ) 6%, lithium carbonate (Li 2 CO 3 ) 5%, zirconia (ZrO 2 ) 2%, clay (Hydrotalcite) 8%, boric acid (H 3 BO 3 ) 25%.

[0033] The raw material of electroless plating solution is: nickel sulfate (NiSO 4 ) 30g / L, sodium hypophosphite (NaH 2 PO 2 ) 25g / L, sodium citrate (Na 3 C 6 h 5 o 7 2H 2 O) 25g / L, thiourea (CH 4 N 2 S) 0.001g / L.

[0034] The sintering temperature is 680°C, the pressure is 2MPa, and the pressure is held for 3min. The prepared low-temperature ceramic-metal bond has a flexural strength of 140~160MPa and an impact strength of 2.5~4kJ / m 2 , hardness 123~125HRB.

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Abstract

The invention belongs to the field of preparation of binders for abrasive tools, and relates to a low-temperature ceramic metal binder for abrasive tools and applications. The invention adopts the chemical plating method to introduce the metal into the ceramic bond, so as to improve the defects of high brittleness, low strength and poor thermal conductivity of the ceramic bond. Compared with the traditional mechanical mixing method, the prepared composite binder has better uniformity and bonding force between the ceramic and the metal, and effectively improves the poor compatibility between the ceramic and the metal. Compared with the ceramic bond, the composite bond prepared by the invention has significantly improved flexural strength and impact strength, not only has the sharpness of ceramics, but also avoids the cracking of the ceramic bond in the deep processing process.

Description

technical field [0001] The invention belongs to the field of preparation of bonding agents for grinding tools, and relates to a preparation method of a ceramic-metal composite bonding agent obtained by an electroless plating method. Background technique [0002] Diamond-based vitrified bond abrasives have excellent properties such as high grinding efficiency, high grinding precision, and good self-sharpening, and are widely used in cemented carbide, cutting tools, and automobiles. However, due to the insufficient bending strength, fracture toughness and thermal conductivity of vitrified bond, its application in the field of high-speed and high-precision grinding is restricted. A vitrified metal bond with the dual advantages of vitrified bond and metal bond came into being. The ceramic-metal composite bond abrasive tool has good rigidity, is not easy to deform, and has high precision of the workpiece; the abrasive tool is loose and porous, easy to remove chips, and is not ea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24D3/18B24D3/34B24D18/00C04B35/63
CPCB24D3/18B24D3/342B24D18/0009C04B35/6303C04B35/6316
Inventor 侯永改宋英桃李文凤苏凯侯超
Owner HENAN UNIVERSITY OF TECHNOLOGY
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