Effect of Heat Input on HAZ Properties and Microstructure of SMA490BW Corrosion Resistance Steel

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Welding thermal cycle of SMA490BW corrosion resistance steel with different heat inputs were simulated by using Gleeble-3500 thermo-mechanical simulator to investigate the microstructure and impact toughness of the heat-affected zone (HAZ). The results shows that the microstructure of the coarse-grain heat affected zone(CGHAZ) is mainly composed of lath bainites and the surpass critical coarse-grain heat affected zone(SCCGHAZ) consists mainly of granular bainites with a small content of ferrites. The grain size increased with the heat input increasing, Besides, the impact energy of the surpass critical coarse-grain heat affected zone(SCCGHAZ) is higher than that of the coarse-grain heat affected zone(CGHAZ), when the heat input energy is 15kJ/cm after twice thermal cycle, the impact energy is highest.

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Periodical:

Edited by:

Prasad Yarlagadda, Yun-Hae Kim, Zhijiu Ai and Xiaodong Zhang

Pages:

517-521

DOI:

10.4028/www.scientific.net/AMR.337.517

Citation:

Y. Nie et al., "Effect of Heat Input on HAZ Properties and Microstructure of SMA490BW Corrosion Resistance Steel", Advanced Materials Research, Vol. 337, pp. 517-521, 2011

Online since:

September 2011

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Price:

$35.00

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