Structure and properties of high-speed steels after austempering
by J.A. Kaleicheva
International Journal of Microstructure and Materials Properties (IJMMP), Vol. 2, No. 1, 2007

Abstract: Some special features of the kinetics and mechanism of the bainitic transformation in high-speed steel HS18-0-1 have been studied. Austempering has been performed at temperatures 300°C and 270°C for 10–360 min, after heating up to 1100°C, 1200°C, and 1280°C. Optical metallographic analysis, electron-microscope analysis, X-ray phase analysis and testing of Rockwell hardness have been carried out. The bainitic transformation at temperatures 270°C and 300°C takes place according to the scheme: α + A_(c). The temperature of heating (1100°C, 1200°C, 1280°C) does not influence the mechanism of bainitic transformation. It changes the kinetic process parameters only.

Online publication date: Sat, 31-Mar-2007

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