X100管线钢板及UOE焊管的开发  

DEVELOPMENT OF X100 PIPELINE STEEL PLATE AND UOE WELDED PIPE

作　　者：章传国[1,2] 郑磊[2] 张备[2] 吴扣根[2] 黄卫锋[2] 翟启杰[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072 [2]宝山钢铁股份有限公司,上海201900

出　　处：《上海金属》2016年第4期12-16,共5页Shanghai Metals

摘　　要：采用热模拟和实验室试验轧制方法,研究了低C高Mn微合金化X100管线钢的动态连续冷却转变（CCT）特性和冷却工艺与组织、性能间的关系。分析表明,冷却速率为20-80℃/s时可获得合适的硬度和显微组织,采用低于Ar3相变点的ACC开始冷却温度有利于改善钢的均匀伸长率,150-350℃停止冷却温度有利于获得高的强度和韧性。并根据某工程需求,开发并商业化生产了φ711 mm×12.5 mm、φ711 mm×20 mm规格的X100 UOE焊管,开发的焊管具有优异的管型尺寸,管体-30℃低温冲击能量达到200 J以上,焊缝及热影响区冲击能量达到100 J以上,均满足API 5L标准要求。By using the way of thermo-simulation and pilot rolling, the CCT （Continuous cooling transformation） diagram and the relationship among ACC （accelerated cooling） parameters, microstructure and mechanical properties were studied for the designed X100 pipeline steel with low carbon, high manganese micro-alloyed composition in lab. The analysis of CCT diagram indicated that the suitable hardness and microstructure could be obtained in the cooling rate of 20 - 80 ℃/s. The pilot rolling results showed that the ACC cooling start temperature below Ar3 was beneficial increase in the uniform elongation, and the cooling stop temperature of 150 ~ 350 ℃ was helpful to obtain high strength and toughness combination. The X100 UOE pipe with dimension in O. D. 711 mm ~ W. T. 20.0 mm, O. D. 711 mm x W. T. 12.5 ram, designing for certain engineering, were developed and produced commercially. All of the pipe dimensions and mechanical properties met the requirements of API 5L specification. The average impact energy absorbed for pipe body at -30 ℃ was over 200 J. The average impact energy absorbed for HAZ （heat affected zone ） and WM （welded seam ） at -30 ℃ was over 100 J.

关 键 词：X100管线钢 组织性能 UOE焊管 微合金化 

分 类 号：TG161[金属学及工艺—热处理]