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Influence of welding parameters on nitrogen content in welding metal of 32Mn-7Cr-1Mo-0.3N austenitic steel

  • Fu Rui-dong 
  • Qiu Liang 
  • Wang Cun-yu 
  • Wang Qing-feng 
  • Zheng Yang-zeng 
Article

Abstract

The transfer behavior of nitrogen into the welding metal during gas tungsten arc welding process of 32Mn-7Cr-1Mo-0.3N steel was investigated. The effects of gas tungsten arc welding process variables, such as the volume fraction of nitrogen in shielding gas, arc holding time and arc current on the nitrogen content in the welding metal were also evaluated. The results show that the volume fraction of nitrogen in gas mixture plays a major role in controlling the nitrogen content in the welding metal. It seems that there exhibits a maximum nitrogen content depending on the arc current and arc holding time. The optimum volume fraction of nitrogen in shielding gas is 4% or so. The role of gas tungsten arc welding processing parameters in controlling the transfer of nitrogen is further confirmed by the experimental results of gas tungsten arc welding process with feeding metal.

Key words

nitrogen transfer welding parameter high manganese austenitic steel deposit gas tungsten arc welding 

CLC number

TG142.33 

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Copyright information

© Central South University 2005

Authors and Affiliations

  • Fu Rui-dong 
    • 1
    • 2
  • Qiu Liang 
    • 2
  • Wang Cun-yu 
    • 2
  • Wang Qing-feng 
    • 1
    • 2
  • Zheng Yang-zeng 
    • 1
    • 2
  1. 1.Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdaoChina
  2. 2.School of Materials Science and EngineeringYanshan UniversityQinhuangdaoChina

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