预变形速率对超低碳钢烘烤硬化性能的影响Influence of prestrain rate on bake hardened ability of ultra-low carbon steels
杨震,李维娟,侯少林,韩鹏,蔡茗宇,邵培英,赵圣诗
摘要(Abstract):
测量了超低碳(Ultra-Low Carbon)钢在2%、4%和6%预变形下,运用不同的预变形速率拉伸时其烘烤硬化(Bake Hardening)值和内耗,分析了退火态下的应力-应变曲线以及退火态和烘烤态下的内耗-温度谱:烘烤态下Snoek峰高与退火态下相比降低,对于相同的预变形,拉伸速率增加时,Snoek峰高逐渐升高,而SKK峰高逐渐下降,BH值逐渐下降,不同预变形速率屈服点延伸之间规律不明显。
关键词(KeyWords): ULC钢;预变形速率;内耗;BH值;屈服点延伸
基金项目(Foundation): 国家自然科学基金(51274121)
作者(Author): 杨震,李维娟,侯少林,韩鹏,蔡茗宇,邵培英,赵圣诗
DOI: 10.13289/j.issn.1009-6264.2015.s1.027
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