Effects of Austempering Temperature on Strength, Ductility and Toughness of Low-C High-Al/Si Carbide-Free Bainitic Steel
作者： Jiangying Meng , Ying Feng , Qian Zhou , Leijie Zhao , Fucheng Zhang
DOI: 10.1007/S11665-015-1567-1
关键词:
摘要: The microstructure and the mechanical properties of a low-carbon Al/Si-alloyed carbide-free bainitic steel austempered at temperatures between 300 350 °C have been investigated by means optical microscopy, scanning electron transmission x-ray diffraction analysis, property tests. results show that an excellent combination tensile strength, ductility, impact toughness is obtained austempering temperature 320 °C—but neither lowest nor highest °C. These are correlated with features constituent phases microstructure, especially amount size retained austenite, which largely dependent on temperature. observations also due to inconsistent effects strain-induced martensitic transformation toughness. present study suggest optimized isothermal may exist for any other steel, which, if treatment carried out, improved can be obtained.
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