|
|||||
|
|
| 低熔点元素铋对钢脆化行为的影响 | |
| 引用本文： | 刘海涛,王键,杨争媛,尹宝舒,张家得,张高祥. 低熔点元素铋对钢脆化行为的影响[J]. 钢铁, 2020, 55(1): 81-85. DOI: 10.13228/j.boyuan.issn0449-749x.20190120 |
| 作者姓名： | 刘海涛 王键 杨争媛 尹宝舒 张家得 张高祥 |
| 作者单位： | 1. 河南科技大学材料科学与工程学院, 河南 洛阳 471023; 2. 河南省有色金属材料科学与加工技术重点实验室, 河南 洛阳 471023; 3. 有色金属共性技术河南省协同创新中心, 河南 洛阳 471023 |
| 基金项目： | 国家自然科学基金资助项目(51904090); 国家级大学生创新创业训练计划资助项目(S201810464002); 河南科技大学博士科研启动基金资助项目(13480086); 河南科技大学大学生研究训练计划(SRTP)资助项目(2018028) |
| 摘 要： | 为了探明钢中低熔点元素铋在切削加工和高温变形生产过程中的“两面性”作用,借助切削加工试验、高温热塑性试验及微观组织结构分析,研究了不同温度范围内铋对钢脆化行为的影响。结果表明,在切削加工过程中,低熔点元素铋对钢的脆化作用,使铋易切削钢易于形成对切削加工有利的“C形”脆性屑,从而获得优良的可切削加工性能,该脆化行为主要与钢中铋的液态金属脆化作用有关,显著降低钢在铋熔点温度附近的塑性。在高温变形温度区间,低熔点元素铋对钢脆化行为的影响,主要与奥氏体晶界上铋膜的偏聚有关,脆化晶界,显著降低钢在1 000 ℃及以下试验温度时的热塑性。 |
| 关 键 词： | 低熔点元素铋 切削加工 高温变形 液态金属脆化 晶界偏聚 |
| 收稿时间： | 2019-03-27 |
Effect of bismuth element with low melting point on embrittlement behavior of steel |
|
| LIU Hai-tao,WANG Jian,YANG Zheng-yuan,YIN Bao-shu,ZHANG Jia-de,ZHANG Gao-xiang. Effect of bismuth element with low melting point on embrittlement behavior of steel[J]. Iron & Steel, 2020, 55(1): 81-85. DOI: 10.13228/j.boyuan.issn0449-749x.20190120 | |
| Authors: | LIU Hai-tao WANG Jian YANG Zheng-yuan YIN Bao-shu ZHANG Jia-de ZHANG Gao-xiang |
| Affiliation: | 1. School of Materials Science and Engineering, Henan University of Science and Technology,Luoyang 471023, Henan, China; 2. Henan Key Laboratory of Non-ferrous Materials Science and Processing Technology, Luoyang 471023, Henan, China; 3. Collaborative Innovation Center of Non-ferrous Metals Henan Province, Luoyang 471023, Henan, China |
| Abstract: | In order to prove the "two-sidedness" effect of low melting point elements bismuth during the machining and the high temperature deformation processes in the steel,the influence of bismuth on the embrittlement behavior of steel in different temperature ranges was studied by the cutting experiment,high temperature thermoplastic experiment and microstructure analysis. The results showed that embrittlement of steel by bismuth in the cutting process can promote the formation of "C-shaped" brittle chips and make bismuth free-cutting steel having an excellent machinability. This embrittlement behavior was mainly associated with the liquid metal embrittlement of bismuth in steel,which significantly reduced the plastic of steel at bismuth liquidus temperature. The influence of bismuth on the embrittlement behavior of steel during high temperature deformation was mainly related to the segregation of bismuth film at the austenite grain boundary,which endangered the grain boundary strength of steel,and then significantly reduced the thermoplastic behavior of steel at the experimental temperature range of 1 000 ℃ and below. |
| Keywords: | low melting element bismuth machinability high temperature deformation liquid metal embrittlement grain boundary segregation |
| 本文献已被 CNKI 等数据库收录！ | |
| 点击此处可从《钢铁》浏览原始摘要信息 | |
| 点击此处可从《钢铁》下载全文 | |