X100焊管的组织性能  

Microstructure and Mechanical Properties of X100 Welded Pipes

作　　者：包志刚[1,2] 毕宗岳[1,2] 牛辉[1,2] 刘海璋[1,2] 赵红波[1,2] 张万鹏[1,2] 刘斌[1,2] 

机构地区：[1]宝鸡石油钢管有限责任公司,陕西宝鸡721008 [2]国家石油天然气管材工程技术研究中心,陕西宝鸡721008

出　　处：《焊管》2014年第7期5-8,共4页Welded Pipe and Tube

基　　金：国家科技支撑计划课题;超高强度油气输送管材关键技术研究(2011BAE35B01)

摘　　要：对X100焊管的母材和焊接接头微观组织及其与力学性能之间的关系进行了研究。结果表明,母材的组织为粒状贝氏体和针状铁素体,且针状铁素体含量较多时,强韧匹配较好,有较好的低温冲击韧性;焊缝组织为针状铁素体和先共析铁素体,不同组织焊缝性能相差不大;热影响区粗晶区组织为粒状贝氏体,细小弥散的马奥岛有利于热影响区粗晶区获得跟好的强度和韧性,但是较多的马奥岛会提高热影响区的韧脆转变温度。In this article, the relationship between the microstructure and mechanical properties of base metal and welding joint of X100 welded pipes were studied. The result showed that the microstructure of base metal consists of granular bainite and acicular ferrite, the more acicular ferrite, the better strength-toughness matching and toughness at low temperature. The microstructure of weld is acicular ferrite and the proeutectoid ferrite, and the difference of different weld microstructure is small. The microstructure of HAZ coarse grain zone is granular bainite. The fine and dispersive M/A island is favorable for obtaining better strength and toughness, but more M/A island can increase the ductile-brittle transition temperature of HAZ.

关 键 词：焊接 X100 焊接接头 力学性能 

分 类 号：TE973[石油与天然气工程—石油机械设备]