医疗器械用高氮不锈钢中厚板钨极氩弧焊接接头的组织与性能
Microstructure and Mechanical Properties of GTAW Joint of High Nitrogen Austenitic Stainless Steel Medium Thick Plates for Medical Devices
摘 要
采用钨极氩弧焊对7 mm厚的高氮不锈钢板进行了焊接,研究了焊接接头的组织和力学性能.结果表明:焊缝区和热影响区组织为奥氏体和δ-铁素体,当2%氮气加入保护气体时,焊缝强度明显提高,抗拉强度达到865 MPa,与母材(抗拉强度875 MPa)相当,且焊缝韧性也可获得提高;整个焊接接头具有良好的低温冲击韧性,-40 ℃时,焊缝区的冲击吸收功为70 J,熔合线附近的冲击吸收功为55 J,热影响区的冲击吸收功为60 J.
钨极氩弧焊
组织
力学性能
high nitrogen austenitic stainless steel
gas tungsten arc welding
microstructure
mechanical property
Abstract
Gas tungsten arc welding (GTAW) was used to weld 7 mm thick high nitrogen stainless steel.Microstructure and mechanical properties of the welded joint were studied.The results show that microstructure of weld zone and heat affected zone both was austenite and δ-ferrite.When 2% N2 was added to the shielding gas,tensile strength of the weld zone was remarkably increased to 865 MPa,close to that of the parent metal (875 MPa),and toughness was also increased.At -40 ℃,impact absorbed energy of the weld zone reached 70 J and that of the heat affected zone was about 60 J showing that the whole joint had good low temperature toughness.
中图分类号 TG457.11
所属栏目 材料性能及其应用
基金项目 国家重点基础研究规划(973)项目(2004CB619103)
收稿日期 2007/10/19
修改稿日期 2008/2/9
网络出版日期
作者单位点击查看
备注安瑞金(1966-),女,北京人,工程师.
引用该论文: AN Rui-jin,ZHAO Lin,TIAN Zhi-ling,PENG Yun. Microstructure and Mechanical Properties of GTAW Joint of High Nitrogen Austenitic Stainless Steel Medium Thick Plates for Medical Devices[J]. Materials for mechancial engineering, 2008, 32(12): 55～58
安瑞金,赵琳,田志凌,彭云. 医疗器械用高氮不锈钢中厚板钨极氩弧焊接接头的组织与性能[J]. 机械工程材料, 2008, 32(12): 55～58
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参考文献
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【3】Diener M,Speidel M O.Fatigue and corrosion fatigue of high-nitrogen austenitic stainless steel[J].Materials and Manufacturing Processes,2004,19:111-115.
【4】Coogan T P,Latta D M,Snow E T,et al.Toxicity and carcinogenicity of nickel compounds[J].CRC Critical Reviews in Toxicology,1989,19:341-384.
【5】Denkhaus A E,Salnikow K.Nickel essentiality,toxicity,and carcinogenicity[J].Critical Reviews in Oncology/Hematology,2002,42:35-56.
【6】Harzenmoser M.Welding of high nitrogen steels[J].Materials and Manufacturing Processes,2004,19:75-86.
【7】Woo I,Kikuchi Y.Weldability of high nitrogen stainless steel[J].ISIJ International,2002,42:1334-1343.
【8】Hertzman S,Jargelius Parrerson R,Blom R,et al.Influence of shielding gas composition and welding parameters on the N-content and corrosion properties of welds in N-alloyed stainless steel[J].ISIJ International,1996,36:968-976.
【9】Du Toit M,Pistorius P C.Nitrogen control during autogenous arc welding of stainless steel:Part I-Experimetal observations[J].Welding Journal,2003,82:219-224.
【10】Hertzman S,Wessman S.An experimental and theoretical study of nitrogen flux in stainless steel TIG welds[J].Materials Science Forum,1999,318/320:579-590.
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