The Effect of Cooling Rate and Overaging Time on the Mechanical Properties of a Ultra-Low Carbon Auto Steel

Fang Fang; Li Bo Pan

doi:10.4028/www.scientific.net/AMR.1004-1005.179

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1004-1005The Effect of Cooling Rate and Overaging Time on...

The Effect of Cooling Rate and Overaging Time on the Mechanical Properties of a Ultra-Low Carbon Auto Steel

Abstract:

A series of annealing parameters including the cooling rate and overaging time, especially ultra high cooling rate of a ultra-low carbon auto steel were conducted on HDPS (hot dipping process simulator) in experiment. The research results show that, when samples were conducted under extra fast cooling rate higher than 30 °C/s, yield and tensile strength almost changed not when cooling rate increased from 30 to 50 °C/s, as cooling rate reached 90 °C/s, the strength and elongation changed more rapidly. When the overaging time changed from 130 to 300 s, the elongation was more sensitive, changed from 19.7 to 25.6 %. Yield and tensile strength were not sensitive when aging time was below 213 s, but with increasing aging as high as 300 s, the yield strength decreased 11 MPa, and tensile strength decreased 21 MPa.

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Periodical:

Advanced Materials Research (Volumes 1004-1005)

Pages:

179-182

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1004-1005.179

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Online since:

August 2014

Authors:

Fang Fang*, Li Bo Pan

Keywords:

Auto, Cooling Rate, IF (Interstitial Free) Steel, Mechanical Property, Overaging

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