成分工艺对X65抗HIC管线钢组织性能的影响  

Effect of composition and processes on microstructure and properties for X65 HIC-resistance pipeline steel

作　　者：章传国[1] 郑磊[1] 

机构地区：[1]宝山钢铁股份有限公司研究院,上海201900

出　　处：《宝钢技术》2015年第2期23-26,共4页Baosteel Technology

基　　金：国家科技支撑计划课题"高强度耐腐蚀石油天然气集输和输送用管线钢生产技术"(2011BAE25B03)资助

摘　　要：实验室研究了合金成分及卷取工艺对X65抗HIC管线钢的显微组织、力学性能、抗HIC性能的影响规律。结果表明,添加Cu、Ni、Mo合金或降低卷取温度均有利于改善钢的强韧性及抗HIC性能。对于C-Si-Mn基础成分,在450-550℃范围内卷取时,随着卷取温度的下降,珠光体含量减少而贝氏体含量逐渐增加,力学性能变化不明显,但抗HIC性能显著提升;在同样的工艺条件下,Cu、Ni尤其是Mo合金的添加,抑制了珠光体转变,贝氏体的比例显著增加且晶粒更加细小,因此,强度、韧性及抗HIC性能均呈上升趋势。Effect of alloy elements and coiling temperatures on microstructure, mechanical properties and HIC performances for X65 HIC-resistance pipeline steel. The results showed that it was helpful to improve the strength, toughness and HIC properties by the addition of Cu, Ni, Mo alloy or lowering the coiling temperature. For the C - Si - Mn steel, the HIC-resistance performance were improved with reducing the coiling temperature due to the decrease of pearlite proportion and the increase of bainite proportion, when the coiling temperature is in the range of 450 -550℃. In the condition of the same manufacturing processes, with increasing the content of Cu, Ni and Mo especially, the pearlite transformation were retarded and the more fine bainite microstructure were observed, which improved the combination of the strength, toughness and HIC-resistance performance.

关 键 词：X65 合金化 管线钢 抗HIC 

分 类 号：TG142.1[一般工业技术—材料科学与工程]