深井开发用超高强度高韧性套管组织对韧性的影响研究  

STUDY ON INFLUENCE OF MICROSTRUCTURE ON THE TOUGHNESS OF ULTRA HIGH STRENGTH AND TOUGHNESS CASING FOR DEEP WELL SERVICE

作　　者：董晓明[1,2] 张忠铧[2] 尹卫东[3] 陈功明[3] 

机构地区：[1]上海大学材料科学与工程学院,上海200072 [2]宝钢集团中央研究院,上海201900 [3]宝钢股份有限公司钢管条钢事业部,上海201900

出　　处：《上海金属》2015年第5期1-5,共5页Shanghai Metals

基　　金：国家科技支撑计划项目(2011BAE25B00)

摘　　要：采用扫描电镜和透射电镜微观分析手段,对深井用超高强度高韧性套管中Mo合金元素对韧性的影响以及管坯制造工艺对套管韧性的影响进行研究,发现析出相的尺寸和分布以及成分偏析造成的组织不均能够显著影响材料的韧性。通过合金化和微合金化以及成分偏析控制技术研究,开发出具有优异夏比冲击韧性的140 ksi和155 ksi钢级的套管材料,材料在0℃下的夏比横向冲击功超过了屈服强度的10%以上。The effect of Mo and tube billet production process on the toughness of ultra high strength and toughness easing for deep and ultra deep well were investigated by SEM and TEM, it was found that the size and distribution of precipitation and structure inhomogeneity caused by composition segregation significantly influenced the toughness of material. With the improvement of precipitated phases through alloying and segregation suppression, the transverse Charpy impact value of 140 ksi and 155 ksi grade casing at 0 ℃ surpassed the requirement of 10% yield strength.

关 键 词：超高强度 高韧性 套管 深井 组织 韧性 

分 类 号：TG142.41[一般工业技术—材料科学与工程]