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.

所属栏目

材料性能及其应用国家重点基础研究规划(973)项目(2004CB619103)

收稿日期

2007/10/192008/2/9

作者单位

安瑞金:北京儿童医院医疗器械科, 北京 100045
赵琳:钢铁研究总院结构材料研究所, 北京 100081
田志凌:钢铁研究总院结构材料研究所, 北京 100081
彭云:钢铁研究总院结构材料研究所, 北京 100081

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

参考文献

【1】

Foct J.High nitrogen steels and stainless steels[M].UK:Alpha Science Inter.Ltd.,2004:256.

【2】

Uggowitzer P J,Magdowski R,Speidel M O.Nickel free high nitrogen austenific steels[J].ISIJ International,1996,36:901-908.

【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.