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JWJ > Volume 33(1); 2015 > Article
Journal of Welding and Joining 2015 February;33(1) :41-48.
Published online February 28, 2015.
doi:https://doi.org/10.5781/JWJ.2015.33.1.41
Heat input effects on microstructure quenched and tempered steel ASTM A517 to stainless steel AISI 316L
Rouhollah Mohsen Pezeshkian*, Saiedeh Shafaiepour**
*Young Researchers and Elite Club, Najafabad Branch, Islamic Azad University, Najafabad, Iran
**Arta webgostar Co., Isfahan, Iran
Correspondence: Rouhollah Mohsen Pezeshkian  Email: mohsen.pezeshkian@gmail.com
  Published online February 28, 2015
ABSTRACT
In this study, the effect of heat input on weld metal microstructure and the effects of dissimilar weld heat affected zone in quenched and tempered ASTM A517 on the stainless steel AISI 316L is investigated through the optimization of welding parameters. For this purpose, two welding techniques are used, tungsten-conventional gas and pulsed gas with weld wire ER 309MoL with Diameter 2.4 mm. Research showed that the grain size of the heat affected zone in pulsed welding is less compared with conventional welding; weld metal structure is fully austenitic, it has a finer structure in the pulsed method. Additionally, the growth of weld metal adjacent steel A517 is different from steel 316L. Further, investigation showed that the rate of dilution is less in the pulsed method and the impact energy is increased in each three regions of the weld metal and heat affected zones in the pulsed method; the fracture in the weld metal and heat affected zone of steel 316L is quite soft and it is semi-crispy in the heat affected zone of steel A517.
Keywords: P460N | SMAW | Groove angle | HAZ | Fine grain steel
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