Microstructures and Tensile Properties of Maraging Steel Processed by Equal-Channel Angular Pressing

摘要：

An 18Ni (C-250) maraging steel was successfully processed by equal channel angular pressing (ECAP) for a single pass at room temperature. Microstructural observations showed that the martensite laths of 18Ni maraging steel were elongated to more narrow bands with a width of 100200 nm after ECAP deformation. After ageing treatment, many nano-sized precipitates distributed uniformly within the refined martensite lathes. In comparison with the tensile strength (1940 Mpa) of general used steel (solution+aging treatment), the tensile strength of the sample processed by ECAP and subsequent aging treatment was enhanced for more than 100 Mpa (above 2050 Mpa). The enhancement of tensile properties was attributed to microstructural refinement and uniformly distributed nanoprecipitates.

作者: M.X.Yang G.Yang Z.D.Liu C.Wang C.X.Huang

作者单位: Central Iron and Steel Research Institute,Beijing,100081,China Faculty of Material Science and Engin Central Iron and Steel Research Institute,Beijing,100081,China

会议类型: 国际会议

会议名称: 5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)

会议地点: 南京

会议语种:英文

页码: 421-426

在线出版日期: 2011-03-01（万方平台首次上网日期，不代表论文的发表时间）