Influence of welding parameters on nitrogen content in welding metal of 32Mn-7Cr-1Mo-0.3N austenitic steel
- 102 Downloads
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 wordsnitrogen transfer welding parameter high manganese austenitic steel deposit gas tungsten arc welding
Unable to display preview. Download preview PDF.
- Morris J W. Structural alloys for high field super-conducting magnets[J]. Advances in Cryogenic Engineering Materials, 1986, 32: 1–12.Google Scholar
- Suemune K, Sugino K. Improvement of toughness of a high-structure, high manganese stainless steel for cryogenic use[J]. Advances in Cryogenic Engineering, 1986, 32: 51–56.Google Scholar
- Sakamoto T, Nakajima H. Nitrogen-containing 25Cr-13Ni stainless steel as a cryogenic structure material[J]. Advances in Cryogenic Engineering, 1984, 30: 137–144.Google Scholar
- FU R D, YIN Y B, ZENG Y Z. Mechanical properties of 32Mn-7Cr-0.6Mo-0.3N austenitic steel for cryogenic applications[J]. Journal of Materials of Engineering and Performance, 2001, 10(4): 393–500.Google Scholar
- Kuwana T, Kokawa H. Nitrogen absorption of stainless steel welding metal in pressurized welding atmospheres[J]. Transaction of the Japan Welding Society, 1987, 18(2): 10–17.Google Scholar
- Toit M D. Nitrogen control during autogenous arc welding of stainless steel (Part 1): experimental observations[J]. Welding Journal, 2003, 82(8): 219–224.Google Scholar
- Toit M D. Nitrogen control during the autogenous arc welding of stainless steel(Part 2): a kinetic model for nitrogen absorption and desorption[J]. Welding Journal, 2003, 82(9): 231–237.Google Scholar
- Allum G J. Nitrogen Absorption from Welding Arcs. IIW DOC 212 - 659 - 86[R]. Lisbon: International Institute of Welding, 1987.Google Scholar
- Kuwana T, Kokawa H. The nitrogen absorption of stainless steel weld metal during gas tungsten arc welding[J]. Transactions of the Japan Welding Society, 1986, 17(2): 30–35.Google Scholar
- Omura T. Nitrogen distribution on rapid solidification in laser welded duplex stainless steels[J]. Welding Research Abroad, 2000, 46(12): 10–11.Google Scholar