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Low-temperature ceramic and metal composite binding agent used for grinding tool and preparing method of low-temperature ceramic metal composite binding agent

A ceramic bond and composite bond technology, applied in metal processing equipment, grinding/polishing equipment, abrasives, etc., can solve the problems of poor physical and chemical compatibility and unsatisfactory composite effect, and achieve performance improvement and improvement. Wetting conditions, development-promoting effects

Active Publication Date: 2019-11-29
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 preparing of binding agents used for grinding tools and relates to a low-temperature ceramic and metal binding agent used for a grinding tool and application. A chemical plating method is adopted for introducing metal into a ceramic bonding agent, and the defects that the ceramic binding agent is large in brittleness, low in strength and poor in heat conductivity are overcome. Compared with a traditional mechanical mixing method, in the prepared composite binding agent, the uniformity and binding force of ceramic and metal are better, and the condition that the compatibility of ceramic and metal is poor is effectively improved. Compared with a ceramic binding agent, the tensile strength and impact strength of the prepared composite binding agent are obviously improved, sharpness of ceramic is achieved, and the cracking condition of the ceramic binding agent in the deep processing process is also avoided.

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 Applications(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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