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X100管线钢连续冷却转变的显微组织

Microstructure of X100 high strength pipeline steel during continuous cooling transformation

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【Author】 ZHANG Xiao-yong~(1,2),GAO Hui-lin~2,JI Ling-kang~3,ZHUANG Chuan-jing~3(1.School of Materials Science and Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;2.School of Materials Science and Engineering,Xi’an Shiyou University,Xi’an 710065,China;3.Tubular Goods Research Center of China National Petroleum Corporation,Xi’an 710065;China)

【机构】西安建筑科技大学材料科学与工程学院；西安石油大学材料科学与工程学院；中国石油天然气集团公司管材研究所；

【摘要】采用热模拟技术和显微分析方法,对X100管线钢在连续冷却转变下的显微组织的变化规律进行了研究。通过X100管线钢CCT曲线的建立和组织分析表明:当冷却速度低于0.2℃/s时,组织类型以多边形铁素体(PF)为主。在0.5~10℃/s的冷却速度范围,主体组织为准多边形铁素体(QF)和粒状铁素体(GF)。当冷却速度大于20℃/s,组织以贝氏体铁素体(BF)为主。大于50℃/s的冷却速度,将形成马氏体(M)。更多还原

【Abstract】 Microstructure in a continuously cooled X100 high strength pipeline steel was investigated by means of heat simulation technique on a Gleeble-1500 simulator,optical microssope(OM)and transmission electron microscopy(TEM).The results show that the microstructure of X100 high strength pipeline steel is mainly composed of polygonal ferrite(PF)when the cooling rate is lower than(0.2 ℃/s.) Quasi-polygonal ferrite and granular ferrite(QF+GF)prevails in the steel with the cooling rate of 0.5-10 ℃/s.When the cooling rate is higher than 20 ℃/s,the microstructure of X100 pipeline steel mainly consists of bainitic ferrite(BF).Martensite(M)forms in the steel with the cooling rate higher than 50 ℃/s.更多还原

【关键词】 X100管线钢；显微组织；连续冷却转变；
【Key words】 X100 pipeline steel； microstructure； continuous cooling transformation；

【基金】国家自然科学基金项目(50874090)

【文献出处】材料热处理学报 ,Transactions of Materials and Heat Treatment , 编辑部邮箱 ,2010年01期

【分类号】TG142.1
【被引频次】31
【下载频次】637

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