摘要
讨论高铬铁素体耐热钢管发展中的一些问题及争议。介绍造成高铬铁素体耐热钢管发生早期损毁的主要原因--焊接热影响区的Ⅳ型开裂;分析国外高铬铁素体耐热钢管母材和焊接接头横向的蠕变断裂特性,及该产品国产化进展情况和国内产品的蠕变特性;解析T/P/G91钢的Ⅱ型化学成分设计及存在的异议;探讨高铬铁素体耐热钢蠕变的宏观力学规律和微观演化动力,以及焊缝热影响区蠕变劣化比母材快和G91钢焊缝金属化学成分附加w(Mn+Ni)≤1.4%的原因等。
Discussed here in the essay are some controversial issues related to development of the hi-Cr ferrite heat-resisting steel tube.Described is the critical reason for the early-stage damage of such tube,i.e.,theⅣtype cracking as occurring in the welding HAZ.Also analyzed are the property of the transversal creep rupture of the base metal and the weld joint of a certain hi-Cr ferrite heat-resisting steel tube as imported from abroad,and the progress as made in localization of such tube,and the creep property of the similar tube as made at home.Analyses are carried out for theⅡtype chemical composition design of T/P/G91 steels as well as relevant objections.Discussed are the macro mechanics law and micro dynamic evolution of the said steel,and the reasons for that the creep deterioration of the weld seam HAZ is faster than that of the base metal,and that the additional w(Mn+Ni)of the weld seam metal chemical composition of G91 steel is≤1.4%.
作者
何德孚
王晶滢
HE Defu;WANG Jingying(Shanghai Jiuli Industrial and Trade Development Co.,Ltd.,Shanghai200135,China;Zhejiang Datrans Piping Co.,Ltd.,Huzhou313103,China)
出处
《钢管》
CAS
2019年第6期5-13,共9页
Steel Pipe
关键词
耐热钢管
高铬铁素体
服役寿命
蠕变断裂强度
蠕变速率
扩散和蠕变劣化
Ⅳ型开裂
heat-resisting steel tube
hi-Cr ferrite
service life
creep rupture strength
creep rate
diffusion and creep deterioration
Ⅳtype cracking
