Effect of Tempering Temperature on Mechanical Properties and Microstructures of 800MPa Microalloy Low Carbon Bainitic Steel

Ke Lu Wang; Xin Li; Xian Juan Dong

doi:10.4028/www.scientific.net/AMR.893.406

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 893Effect of Tempering Temperature on Mechanical...

Effect of Tempering Temperature on Mechanical Properties and Microstructures of 800MPa Microalloy Low Carbon Bainitic Steel

Abstract:

The effect of tempering temperature on the microstructures and mechanical properties of a microalloy low carbon bainitic steel was investigated by microscopic analysis and testing of mechanical properties. The results show that the microstructures of the tested steel primarily consists of lath bainite, granular bainite, quasipolygonal ferrite and little acicular ferrite at different tempering temperatures. With the tempering temperature increasing, the proportion of lath bainitie decreases, while the volume of granular bainite and quasipolygonal ferrite increases. At the tempering temperatures of 550-650°C and tempering time of 1 hour, the steel was mostly composed of granular bainite, quasipolygonal ferrite and a little lath bainite, which a good combination of strength and toughness can be obtained.

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Periodical:

Advanced Materials Research (Volume 893)

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406-409

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.893.406

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Online since:

February 2014

Authors:

Ke Lu Wang*, Xin Li, Xian Juan Dong

Keywords:

Low Carbon Bainitic Steel, Mechanical Property, Microstructure, Tempering Temperature

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