Study on the Microstructure, Chemical Gradient and Machinablity of High-strength Alloy Boron Cast Iron

Abstract

Abstract: Alloy boron cast iron has high property of hardness, high strength, abrasion resistance and heat resistance, which is often used in cylinder liner of highspeed locomotive diesel. The microstructure and chemical composition of the alloy boron cast iron were discussed. The machinability evaluation was carried out by turning tests. The result indicates that the alloy boron cast iron as one kind of Atype graphite cast iron has excellent mechanical property. Sialon ceramic tool shows much better performance compared with uncoated and TiAlN coated P20 carbide tool during high speed cutting of alloy boron cast iron.

Key words: alloy boron cast iron, turning, tool wear, TiAlN coating, Sialon ceramics

AN Qing-Long, NIU Qiu-Lin, MING Wei-Wei, CHEN Ming. Study on the Microstructure, Chemical Gradient and Machinablity of High-strength Alloy Boron Cast Iron[J]. Journal of Shanghai Jiaotong University, 2012, 46(07): 1049-1053.

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Study on the Microstructure, Chemical Gradient and Machinablity of High-strength Alloy Boron Cast Iron

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