Continuous cooling transformation diagrams use in material design for high strength oil and gas transmission linepipe steels
The economical movement of gas and oil to the marketplace requires transmission pipelines to be designed to operate at higher pressures with improved toughness over a variety of temperature ranges.To meet the higher strength and toughness specification requirements of these transmission pipelines the proper material design must be used.This includes material design considerations for alloy,processing,desired microstructure,and cost.A continuous cooling transformation (CCT)diagram is a tool that can be used to design alloy,processing,and microstructure for transmission pipeline steels in a cost effective manner.In the past CCT diagrams were developed under laboratory conditions and thus not practical for commercial pipeline design considerations.However,with the advent of technology,reasonably accurate computer generated CCT diagrams can be quickly produced.These computer generated diagrams can give a material design engineer a reasonable understanding of a given alloy design subjected to various processing routes and the resultant microstructure.Since final microstructure is a key variable in final pipeline steel material properties,the chosen alloy/processing route and its effect on the final microstructure needs to be understood.This paper will discuss the role of CCT diagrams in the design of steels (cost,alloy,processing,and microstructure)for oil and gas transmission pipelines.Examples of computer generated CCT diagrams for various API alloy designs will be included.
CCT diagrams API microstructure computer generated oil gas transmission
Douglas G Stalheim Govindarajan Muralidharan
DGS Metallurgical Solutions,Inc.,15003 NE 10th Street,Vancouver,WA 98684,USA Oak Ridge National Laboratory,One Bethel Valley Road,Oak Ridge,TN 37831 ,USA
国际会议
上海
英文
485-490
2008-09-26（万方平台首次上网日期，不代表论文的发表时间）