医疗器械用高氮不锈钢薄板激光焊接接头的组织与性能  

Microstructure and Mechanical Properties of Welded Joint of High Nitrogen Austenite Stainless Steel Thin Plates for Medical Devices

作　　者：安瑞金[1] 赵琳[2] 田志凌[2] 彭云[2] 

机构地区：[1]北京儿童医院医疗器械科,北京100045 [2]钢铁研究总院结构材料所,北京100081

出　　处：《应用激光》2007年第6期479-482,共4页Applied Laser

摘　　要：高氮奥氏体不锈钢具有良好的强韧性,且可避免不锈钢中镍离子引起的生物过敏反应,在医疗器械方面具有广泛应用前景。焊接性是高氮钢的重要应用性能。本文利用激光对3mm厚的高氮钢进行了焊接,研究了高氮钢激光焊接接头的组织、力学性能及其变化规律。研究结果表明,高氮钢激光焊接焊缝组织为奥氏体和少量的δ-铁素体,接头没有出现软化区,拉伸实验均断在母材处。焊缝具有较高的冲击韧性。High nitrogen austenite stainless steel has high toughness and high strength. It can also avoid the anaphylactoid effect on biological tissue caused by nickel ions in normal austenite steel. This kind of steel can be widely used in medical devices if it can be well welded. In this paper laser is used to weld the 3 mm thick steel. The microstructure and mechanical properties of welded joint are studied. Experiment results indicate that the microstructure of weld metal is austenite and a little of δ- ferrite. There is no softened zone. Tensile specimens break in the area of base metal. Weld metal has high toughness.

关 键 词：高氮奥氏体不锈钢 激光焊接 组织 力学性能 

分 类 号：TG142.25[一般工业技术—材料科学与工程] TG146.2[金属学及工艺—金属材料]