代永娟,米振莉,唐荻,吕建崇

• 1:北京科技大学高效轧制国家工程中心
• 2:河北科技大学材料科学与工程学院

摘要(Abstract)：

通过金相显微镜和透射电镜分析研究了退火态TWIP钢的微观结构特征。结果表明,经过600℃退火10min后钢中存在冷轧的纳米级变形孪晶及少量位错;分别在700、800、900和1000℃退火10min后,发现退火温度决定了退火孪晶的尺寸:随退火温度升高,退火孪晶尺寸增大。退火孪晶仅有少量在再结晶过程中产生,而大量的退火孪晶在再结晶结束后的晶粒长大过程中生成并长大。退火孪晶尺寸的大小影响了TWIP钢的力学性能,孪晶尺寸为2～5μm时,试验钢表现出高强度,此时抗拉强度可达840MPa;孪晶尺寸为30～50μm时,试验钢表现出高的伸长率,可达到84.0%,表现出充分的TWIP效应。

关键词(KeyWords)： 退火温度;退火孪晶;TWIP效应;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50575022);; 国家“863”计划(2008AA03E502)

作者(Author): 代永娟,米振莉,唐荻,吕建崇

DOI: 10.13289/j.issn.1009-6264.2010.11.022

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