期刊
MATERIALS SCIENCE AND TECHNOLOGY
卷 35, 期 13, 页码 1539-1550出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/02670836.2019.1631946
关键词
Austenisation temperature; below martensite starting temperature; transformation kinetics; microstructure; mechanical properties
资金
- National Nature Science Foundation of China [51704217, 51874216]
- Major Projects of Technological Innovation in Hubei [2017AAA116]
- Hebei Joint Research Fund for Iron and Steel [E2018318013]
- State Scholarship Fund of China Scholarship Council
Effects of austenisation temperature on martensite and bainite transformation behaviour, microstructure, and mechanical properties of a bainitic steel austempered below martensite starting temperature were investigated in this study. Results show that the amount of athermal martensite gradually increased with the increase of austenisation temperature, whereas the amounts of bainite and retained austenite initially increased and then decreased, resulting in the trend of the first increase and then decrease in the product of tensile strength and elongation. In addition, the transformation rate of isothermal bainite after athermal martensite formation revealed a trend of deceleration and then acceleration with austenisation temperature at the beginning period. Moreover, the size of bainite plates decreased first and then increased with austenisation temperature.
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