Heat Treating Opportunities for Medium Manganese Steels
Substantial efforts are underway to further develop medium manganese steels as part of ongoing activities towards the production next generation advanced high strength sheet steels.A variety of manganese levels ranging from approximately 5 to 15 wt pct are being considered.Heat treating frequently involves intercritical annealing to stimulate manganese diffusion from ferrite to austenite thereby stabilizing austenite fractions to room temperature.Annealing studies have employed batch annealing cycles in addition to continuous annealing thermal profiles and austenite fractions have been effectively stabilized using both thermal paths.Although appreciable ductility levels are obtained via this approach,strength levels,in particular yield strength,are sometimes modest.The present contribution will explore heat treating approaches that introduce martensite into the final microstructure by the quenching and partitioning process and by modifications to the annealing of medium manganese steels.
third generation AHSS medium Mn steel martensite quenching and partitioning
EMMANUEL De Moor JOHN G. Speer DAVID K. Matlock
Advanced Steel Processing and Products Research Center, Colorado School of Mines;1500 Illinois St.; Golden, Co., 80401, USA
国际会议
成都
英文
182-185
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）