Effect of Prior Deformation on Welding Microstructure of Steel 304L

This subject was raised by an automotive company.Based on the welding design on the curved surface,the effect of prior deformation on the weld structure was studied.Metal active-gas welding was used on the T-joint and pre-deformed plates of austenitic stainless steel 304L to find the proper welding...

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Published inCai liao gong cheng = Journal of materials engineering Vol. 45; no. 1; pp. 7 - 13
Main Authors Wu, Luo-fei, Cheng, Qiang, Li, Zhu-guo
Format Journal Article
LanguageChinese
Published Journal of Materials Engineering 20.01.2017
Subjects
Austenitic stainless steels
Deformation
Electric potential
metal active-gas
Microstructure
prior deformation
Tee joints
Welded joints
Welding
Welding parameters
welding process
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ISSN1001-4381
1001-4381
DOI10.11868/j.issn.1001-4381.2015.000051

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Summary:This subject was raised by an automotive company.Based on the welding design on the curved surface,the effect of prior deformation on the weld structure was studied.Metal active-gas welding was used on the T-joint and pre-deformed plates of austenitic stainless steel 304L to find the proper welding parameters and observe the effect of prior deformation on the microstructure.The proper parameters acquired are:the speed of the torch is 4mm/s,the speed of delivery of welding wire is 2.5m/min and the voltage is 17V.In the T-joint and pre-deformed joint,the weld toes are in the zone with strain of 0% and 30%.In the pre-deformed welding specimen,it was observed that the fusion zone and partially melted zone are narrowed,carbide precipitation and ferrites are found less.In all,the microstructure in the pre-deformed weld joints on 304L is more uniform.
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ISSN:1001-4381
1001-4381
DOI:10.11868/j.issn.1001-4381.2015.000051