Welding and weldability of candidate ferritic alloys for future advanced ultrasupercritical fossil power plants

被引:118
作者
David, S. A. [1 ]
Siefert, J. A. [2 ]
Feng, Z. [1 ]
机构
[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
[2] Elect Power Res Inst, Charlotte, NC 28262 USA
关键词
Ferritic alloys; Type IV cracking; Fossil energy; Ultrasupercritical; Dissimilar metal welds; Weld repair; Friction stir welding; HEAT-AFFECTED ZONE; RESIDUAL-STRESSES; CREEP STRENGTH; IV FRACTURE; STEEL; MICROSTRUCTURE; JOINT; SUPPRESSION; BEHAVIOR; DESIGN;
D O I
10.1179/1362171813Y.0000000152
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Fossil fuels continue to be the primary source of energy in the world. The worldwide demand for clean and affordable energy will continue to grow, and a strong emphasis has been placed on increasing the efficiency and reducing the carbon footprint of new and existing fossil fired power plants. Throughout Asia, Europe and the USA, this demand is being met with programmes to develop advanced materials that have enhanced high temperature creep and corrosion properties. A new class of ferritic alloys, known as creep strength enhanced ferritic steels, has been developed to meet these requirements. This article focuses on the weldability of the advanced ferritic alloys used in boilers and boiler components of ultrasupercritical coal fired power plants. This review focuses on alloy selection; welding and weldability issues, including in service weld failure such as type IV cracking; welding of dissimilar metals; and weld repair. Future articles will address the welding and weldability issues of two other classes of materials, namely austenitic stainless steels and nickel base superalloys.
引用
收藏
页码:631 / 651
页数:21
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