论文部分内容阅读
根据“西气东输二线”站场用钢的技术条件,首钢采用合理的成分设计和严格的控轧控冷工艺,成功开发出具有良好低温韧性的大壁厚X70-X80站场用热轧钢板。产品组织形态以细小均匀的针状铁素体为主,具有高强度、高韧性、低屈强比和良好的低温止裂韧性,用其制成的直缝埋弧焊钢管应用于“西气东输二线”站场工程。
According to the technical conditions of steel used in the station of West-East Gas Pipeline II, Shougang successfully developed X70-X80 large wall thickness site with good low-temperature toughness through rational composition design and strict control of rolling and controlled cooling process Hot-rolled steel. The microstructure of the product is mainly composed of fine and uniform acicular ferrite, which has the advantages of high strength, high toughness, low yield ratio and good low-temperature crack-arresting toughness. Gas Transmission Line "station project.