大学毕业论文-双相不锈钢的焊接工艺研究（论文）设计.doc

学 号_ 毕 业 论 文（设计） 二〇一年 月The Welding Process of?duplex stainless steel Abstract Duplex stainless steel is made of austenite and ferrite two-phase structure composed by a certain percentage, which combines the performance of austenitic stainless steel and ferritic stainless steels. Compared with the single phase stainless steel with high strength characteristics. In recent years, the rapidly expanding range of applications of duplex stainless steel, austenitic stainless steel has become the most powerful competitor in many applications. This paper introduces the definition of duplex stainless steel, classification and performance as well as its internal organization and chemical composition, and specific chemical constituents for each presentation. Then explained the choice for choosing different methods of duplex stainless steel welding, welding equipment, Finally in 2205 as an example focuses on the selection of welding parameters for welding materials, etc. to develop their research welding process. Keyword:Welding process; Process parameters; SMAW 目 录Abstract 第章1 1.1 双相不锈钢的定义和分类··················································1 1.1.1 双相不锈钢的定义·····················································1 1.1.2 双相不锈钢的分类·····················································1 1.2 双相不锈钢的组织和性能··················································1 1.2.1 双相不锈钢的基本组织特征·············································1 1.2.2 双相不锈钢的基本性能·················································1 1.3 双相不锈钢的化学成分····················································2 第2章 双相不锈钢的焊接····················································4 2.1双相不锈钢的焊接材料及选用···············································4 2.1.1 双相不锈钢的焊接材料··················································4 2.1.2 对焊缝金属的要求······················································4 2.1.3 焊接材料的选用························································5 2.2 双相不锈钢的焊接方法····················································6 2.2.1 焊接方法的