陈祥,李言祥,王志胜,张华伟,刘源.Ti对高硼钢显微组织和高温力学性能的影响[J].稀有金属材料与工程,2018,47(3):803~809.[Chen Xiang,Li Yanxiang,Wang Zhisheng,Zhang Huawei,Liu Yuan.Effects of Ti on microstructure and high temperature mechanical properties of high-boron steel[J].Rare Metal Materials and Engineering,2018,47(3):803~809.]
Ti对高硼钢显微组织和高温力学性能的影响
投稿时间:2016-01-14  修订日期:2016-04-19
中文关键词:  Ti  硼化物  高硼钢  高温力学性能  高温抗氧化性能
基金项目:国家自然科学基金资助(项目号50974080)
中文摘要:
      采用SEM和XRD研究了Ti对高硼钢组织的影响。采用冲击试验机、热力学模拟实验机、氧化增重法分析了Ti对实验钢室温冲击性能及850℃高温力学性能、抗氧化性能的影响。结果表明,添加Ti后,高硼钢基体内的硼化物形态圆整、分布呈离散状,硼化物尺寸大幅减小,这种硼化物形态、分布的优化提高了实验钢的室温冲击韧性;高硼钢中添加的Ti在基体内形成了TiC析出相,并使实验钢基体由单一奥氏体转变为奥氏体+铁素体双相组织。添加Ti元素后,B含量较低时提高B含量可以增加材料的高温力学性能,但B含量较高时,高温力强度变化不大。B含量为0.33wt.%时,材料的高温力学性能最佳。添加Ti前后的实验钢的850℃氧化测试结果均符合GB/T 13303-1991中2级“抗氧化性”标准,Ti的加入有利于材料高温抗氧化性能的提高。
Effects of Ti on microstructure and high temperature mechanical properties of high-boron steel
英文关键词:Ti, boride  high-boron steel  high temperature mechanical property  oxidation resistance property
英文摘要:
      The effects of Ti content to the microstructure of high-boron steel were studied by using SEM and XRD. The effects of Ti on impact properties at room temperature, high-temperature mechanical properties and oxidation resistance at 850 °C of the steel were researched by using impact tester, dynamic thermal-mechanical simulation testing machine and oxidation weight increase method. The experimental results showed that the boride granules which distributed in a discrete manner within the matrix exhibited a round and smooth morphology and the boride size decreased greatly after adding Ti. The optimization of boride morphology and distribution made the absorbed impact energy of the steels increased. TiC particles would precipitate and ferrite would form after adding Ti. At a low level of boron content, the high temperature mechanical properties increased with increasing of born content, while at a higher level of boron content, the high temperature mechanical properties had little change. Optimum high temperature mechanical properties were obtained when boron content was at 0.33wt.%. The 850 °C oxidation test results of the steels pro and after adding Ti were all in accordance with grade 2 oxidation resistance standard in GB/T 13303-1991. Ti was conducive to the improvement of the high temperature oxidation resistance properties.
作者单位E-mail
陈祥 清华大学材料学院 xchen@tsinghua.edu.cn 
李言祥 清华大学材料学院  
王志胜 清华大学材料学院  
张华伟 清华大学材料学院  
刘源 清华大学材料学院  
摘要点击次数: 335
全文下载次数: 74
查看全文  查看/发表评论  下载PDF阅读器
关闭