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概述了Mn-Al系第3代汽车用中锰钢的研究现状,介绍了已开发的Mn-Al系中锰钢的化学成分及其设计依据,分析了不同合金对Mn-Al系中锰钢组织和性能的影响,揭示了中锰钢的高强度高塑性和高加工硬化率的形成机制,并讨论了Mn-Al系中锰钢的退火组织和力学性能.

The fundamental research situation and development of Mn-Al medium manganese steel used for 3rd gen-eration automobile sheet were summarized.Chemical compositions and their design gist of Mn-Al medium manga-nese steels were introduced and the effects of addition elements on structures and properties of medium manganese steels were analyzed.The formation mechanisms for the high strength,high plastics and high work hardening rate of medium manganese steel were revealed.The mechanical properties and annealing structures of Mn-Al steel were consequentially discussed.

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