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Preparation of Diamond Tools by Rolling

Author: XuGaoWei
Tutor: ZhaoYuCheng；WangMingZhi
School: Yanshan University
Course: Materials Science
Keywords: Rolling Diamond Tools Sintering Bonding strength Grinding performance
CLC: TG335
Type: Master's thesis
Year: 2011
Downloads: 39
Quote: 0
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Abstract


Rolling for Preparation of diamond tools for the purpose, to study the preparation of a new type of diamond tools - rolling method. Prepared by powder metallurgy diamond tools and composite rolling process and the advantages of the process of rolling Prepared diamond tools, all aspects of research and analysis and experiments. This article was prepared with the rolling complex copper and 08F steel rolling, and then sintered in a protective atmosphere sintering furnace, prepared diamond rolling complex tools. In the process of rolling Prepared diamond tools, first conducted a feasibility analysis to study the distribution of diamond, combined with state of motion, diamond crushing rate, and diamond and metal matrix interface; then research tool for the preparation of the rolling process parameters and sintering process parameters rolling complex tools; final grinding performance testing of the copper rolled complex and 08F steel rolling complex tools. Stereo microscope used in the trial state and morphology of the diamond in the complex were observed; universal testing machine complex interfacial bond strength; use the vise complex bending performance experiments; wear ratio meter measured the grinding performance of the composite tool. The research results show that the rolling method can be prepared diamond tools, the tool has a good interface, good grinding performance, this method greatly reduces the cost of production, is conducive to the mechanization and automation of production. Diamond first scroll in the rolling, When Blockage when started sliding, and leave the gully, after rolling diamond embedded in the inside of the metal substrate; diamond particles in the rolling part broken, crushed form off angle, fault-based and crushing of a small amount of a powder; diamond are more evenly dispersed in the rolling; good combination plus binding agent after sintering of the diamond and the metal substrate interface, the bending test results ideal, no delamination and cracking phenomena. Considering rolling the complex interfacial bond strength and the experimental conditions to determine reasonable rolling the composite process parameters: total rolling reduction rate of 75%; sintering temperature was controlled at 850 ℃, take argon protective atmosphere sintering holding time copper 10 min 08F steel 20 min; Add about 10% of the metal binding agent. The prepared diamond grinding tool has good performance, 25% in the the SiC wheel grinding performance test, copper rolling complex diamond concentration grinding than the highest, nearly 17,08 F steel rolling complex in The diamond concentration of 35% grinding highest ratio reached 13 08F steel grinding efficiency, but is approximately 2 times the copper rolling composite tool of SiC grinding wheel grinding efficiency of up to 45 g / s.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Rolling > Rolling process
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