ENHANCING THE WELDABILITY OF C-Mn PRESSURE VESSEL STEELS-A TALE OF TWO ELEMENTS
Traditionally,pressure vessel steels for the ambient or lower temperature regime have been as-rolled or normalised products(sometimes tempered)developed from a C-Mn base,their strength being increased,as required,using small additions of Cu,Cr,Ni or Mo.For enhanced lower temperature toughness judicious additions of nickel,usually of less than 0.5 percent,have been the preferred option.Alternatively,quenching and tempering,has also been employed.The metallurgy of pressure vessel steels has not evolved as quickly as in the linepipe or automotive sectors and,surprisingly,niobium which is widely recognised to be a remarkable asset particularly in normalised steels where it provides significant grain refinement and increased toughness,has often been ineffectively utilised.However,in some circumstances it has become obvious that the combinations of properties required cannot be economically achieved without its presence.It is unfortunate,therefore,that some national and international pressure vessel specifications are still written in such a way as to,apparently,dissuade the steelmaker from making the best use of this unique and effective element.
Pressure Vessels Steels Niobium Weldability
Phil Kirkwood
Cresswell Consultants Limited,The Old School House,Cresswell,Northumberland,England,NE61 5JT
国际会议
Energy Materials 2014(第一届能源材料国际会议)
西安
英文
61-70
2014-11-04（万方平台首次上网日期，不代表论文的发表时间）