本文主要研究内容
作者杨理洁(2019)在《几种典型合金元素对轨道车辆用301L不锈钢组织和性能的影响及其物理作用机制》一文中研究指出:不锈钢轨道车辆车体材料常采用301L不锈钢,不同强度等级可应用在轨道车辆车体的不同部位。301L不锈钢作为亚稳态奥氏体不锈钢,在冷变形过程中会发生形变诱导马氏体相变,合金元素对马氏体转变的难易和转变量起着决定性的作用,从而直接影响轧制态样品的组织和力学性能。本文采用铝热反应法制备不同Ni、N和Mn含量的301L不锈钢,通过光学显微镜(OM)、扫描电子显微镜(SEM)分析三种合金元素含量对301L不锈钢铸态和轧制态组织影响,通过分析HT-301L不锈钢室温拉伸和显微硬度实验以及N-301L不锈钢室温拉伸实验的结果,研究三种合金元素对301L不锈钢力学性能的影响。1.铸态301L不锈钢包含铁素体δ和奥氏体?两相,在1200℃退火处理3h后,发生铁素体δ向奥氏体?的相变,铁素体δ数量下降,几乎消失。轧制后样品中的奥氏体发生相变形成应力诱导α′-马氏体。随Ni含量增加轧制态样品中α′-马氏体体积分数逐渐降低,抗拉强度和显微硬度呈先增加后下降的趋势,而屈服强度明显减小,延伸率明显增加。随着Ni含量的增加,第一次冷轧退火样的屈服强度和抗拉强度明显减小,而延伸率显著增加。2.N元素的含量对铸态301L不锈钢中铁素体的形貌具有非常显著的影响,随着N含量的增加,铁素体由长条状变化为短棒状和岛状,当N含量达到0.13%时铁素体主要为针状和岛状。随N含量的增加轧制态HT-301L不锈钢中α′-马氏体逐渐减少,形貌总体无太大变化。随着N含量的增加,HT-301L不锈钢的屈服强度、抗拉强度以及显微硬度均明显增加,延伸率先增加后减小。随N含量增加退火态N-301L不锈钢屈服强度和抗拉强度略有增加,而延伸率明显减小。3.随着Mn含量的增加轧制态HT-301L不锈钢中α′-马氏体含量逐渐降低,并且板条状马氏体逐渐破碎,当Mn含量上升至1.42%时,马氏体含量下降至约10%。随着Mn含量从1.00%增加至1.42%,轧制态HT-301L不锈钢屈服强度先减小后增加,抗拉强度、延伸率以及显微硬度逐渐增加;退火态N-301L不锈钢的屈服强度先减小后增加,抗拉强度逐渐减小,延伸率逐渐增加,延伸率最高可达31.10%。4.当层错能在15 mJ·m-218 mJ·m-2或Md30在3537℃时301L具有良好的强度和塑性,而其它参数,尤其是Ms的影响较小。
Abstract
bu xiu gang gui dao che liang che ti cai liao chang cai yong 301Lbu xiu gang ,bu tong jiang du deng ji ke ying yong zai gui dao che liang che ti de bu tong bu wei 。301Lbu xiu gang zuo wei ya wen tai ao shi ti bu xiu gang ,zai leng bian xing guo cheng zhong hui fa sheng xing bian you dao ma shi ti xiang bian ,ge jin yuan su dui ma shi ti zhuai bian de nan yi he zhuai bian liang qi zhao jue ding xing de zuo yong ,cong er zhi jie ying xiang ga zhi tai yang pin de zu zhi he li xue xing neng 。ben wen cai yong lv re fan ying fa zhi bei bu tong Ni、Nhe Mnhan liang de 301Lbu xiu gang ,tong guo guang xue xian wei jing (OM)、sao miao dian zi xian wei jing (SEM)fen xi san chong ge jin yuan su han liang dui 301Lbu xiu gang zhu tai he ga zhi tai zu zhi ying xiang ,tong guo fen xi HT-301Lbu xiu gang shi wen la shen he xian wei ying du shi yan yi ji N-301Lbu xiu gang shi wen la shen shi yan de jie guo ,yan jiu san chong ge jin yuan su dui 301Lbu xiu gang li xue xing neng de ying xiang 。1.zhu tai 301Lbu xiu gang bao han tie su ti δhe ao shi ti ?liang xiang ,zai 1200℃tui huo chu li 3hhou ,fa sheng tie su ti δxiang ao shi ti ?de xiang bian ,tie su ti δshu liang xia jiang ,ji hu xiao shi 。ga zhi hou yang pin zhong de ao shi ti fa sheng xiang bian xing cheng ying li you dao α′-ma shi ti 。sui Nihan liang zeng jia ga zhi tai yang pin zhong α′-ma shi ti ti ji fen shu zhu jian jiang di ,kang la jiang du he xian wei ying du cheng xian zeng jia hou xia jiang de qu shi ,er qu fu jiang du ming xian jian xiao ,yan shen lv ming xian zeng jia 。sui zhao Nihan liang de zeng jia ,di yi ci leng ga tui huo yang de qu fu jiang du he kang la jiang du ming xian jian xiao ,er yan shen lv xian zhe zeng jia 。2.Nyuan su de han liang dui zhu tai 301Lbu xiu gang zhong tie su ti de xing mao ju you fei chang xian zhe de ying xiang ,sui zhao Nhan liang de zeng jia ,tie su ti you chang tiao zhuang bian hua wei duan bang zhuang he dao zhuang ,dang Nhan liang da dao 0.13%shi tie su ti zhu yao wei zhen zhuang he dao zhuang 。sui Nhan liang de zeng jia ga zhi tai HT-301Lbu xiu gang zhong α′-ma shi ti zhu jian jian shao ,xing mao zong ti mo tai da bian hua 。sui zhao Nhan liang de zeng jia ,HT-301Lbu xiu gang de qu fu jiang du 、kang la jiang du yi ji xian wei ying du jun ming xian zeng jia ,yan shen lv xian zeng jia hou jian xiao 。sui Nhan liang zeng jia tui huo tai N-301Lbu xiu gang qu fu jiang du he kang la jiang du lve you zeng jia ,er yan shen lv ming xian jian xiao 。3.sui zhao Mnhan liang de zeng jia ga zhi tai HT-301Lbu xiu gang zhong α′-ma shi ti han liang zhu jian jiang di ,bing ju ban tiao zhuang ma shi ti zhu jian po sui ,dang Mnhan liang shang sheng zhi 1.42%shi ,ma shi ti han liang xia jiang zhi yao 10%。sui zhao Mnhan liang cong 1.00%zeng jia zhi 1.42%,ga zhi tai HT-301Lbu xiu gang qu fu jiang du xian jian xiao hou zeng jia ,kang la jiang du 、yan shen lv yi ji xian wei ying du zhu jian zeng jia ;tui huo tai N-301Lbu xiu gang de qu fu jiang du xian jian xiao hou zeng jia ,kang la jiang du zhu jian jian xiao ,yan shen lv zhu jian zeng jia ,yan shen lv zui gao ke da 31.10%。4.dang ceng cuo neng zai 15 mJ·m-218 mJ·m-2huo Md30zai 3537℃shi 301Lju you liang hao de jiang du he su xing ,er ji ta can shu ,you ji shi Msde ying xiang jiao xiao 。
论文参考文献
论文详细介绍
论文作者分别是来自兰州理工大学的杨理洁,发表于刊物兰州理工大学2019-07-18论文,是一篇关于奥氏体不锈钢论文,合金元素论文,铝热反应法论文,微观组织论文,力学性能论文,兰州理工大学2019-07-18论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自兰州理工大学2019-07-18论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。
标签:奥氏体不锈钢论文; 合金元素论文; 铝热反应法论文; 微观组织论文; 力学性能论文; 兰州理工大学2019-07-18论文;