T-250马氏体时效钢管径缩现象机理研究
来源期刊:上海金属2010年第3期
论文作者:李成魁 严彪 祁红璋 胡正飞
文章页码:7 - 10
关键词:T-250马氏体时效钢; 钢管; 旋压; 固溶处理; 时效处理; 径缩机理
Key words:T-250 Maraging Steel; Steel Pipe; Spinning; Solution Treatment; Aging Treatment; Radial-Shrinkage Mechanism
摘 要:研究马氏体时效钢管工艺过程的组织变化和径缩现象的原因,结果表明,材料经过旋压后,形貌发生明显的扭曲且边缘地区硬度增大。经固溶处理后,颗粒细化并且形貌恢复正常,残余应力消除。时效处理后,部分马氏体转变为奥氏体,并产生沉淀强化相。分析认为,马氏体时效钢的径缩现象主要因旋压后的热处理使形变残余应力消除,晶粒有序化和马氏体奥氏体相的转变所造成,沉淀析出相也有部分贡献。
Abstract: The microstructure variation and the radial shrinking phenomenon during the maraging steel pipes processing were studied.The results showed that the morphology of the materials after spinning presented obviously as twisted,and the hardness increased at the edge.The grains were refined,resumed normal state,and the residual stress was eliminated after the solution treatment. Some martensite turned to austenite and the precipitated phase was found after aging treatment.The analysis indicated that the radial shrinking phenomenon was caused mainly by the elimination of residual stress,the ordering of grains,the transformation from martensite to austenite,and the precipitated phase also did some contribution.
李成魁1,严彪1,祁红璋1,胡正飞1
(1.上海市同济大学材料科学与工程学院上海市金属功能材料开发应用重点实验室)
摘 要:研究马氏体时效钢管工艺过程的组织变化和径缩现象的原因,结果表明,材料经过旋压后,形貌发生明显的扭曲且边缘地区硬度增大。经固溶处理后,颗粒细化并且形貌恢复正常,残余应力消除。时效处理后,部分马氏体转变为奥氏体,并产生沉淀强化相。分析认为,马氏体时效钢的径缩现象主要因旋压后的热处理使形变残余应力消除,晶粒有序化和马氏体奥氏体相的转变所造成,沉淀析出相也有部分贡献。
关键词:T-250马氏体时效钢; 钢管; 旋压; 固溶处理; 时效处理; 径缩机理