首页 | 本学科首页   官方微博 | 高级检索  
     

碲处理含硫钢加热过程中MnS-MnTe夹杂物的演变
引用本文:黄乔,任英,张立峰. 碲处理含硫钢加热过程中MnS-MnTe夹杂物的演变[J]. 中国冶金, 2022, 32(7): 57-66. DOI: 10.13228/j.boyuan.issn1006-9356.20210864
作者姓名:黄乔  任英  张立峰
作者单位:1.北京科技大学冶金与生态工程学院, 北京 100083;
2.北方工业大学机械与材料工程学院, 北京 100144
基金项目:河北省省级科技计划资助项目(20311004D,20591001D)
摘    要:通过实验室加热试验和热力学计算研究了碲处理含硫钢加热过程中MnS-MnTe夹杂物的演变,得出含硫钢加热过程中MnS-MnTe类夹杂物变化的规律与机理。随着钢中碲含量和Te/S质量比的升高,MnS-MnTe类夹杂物的平均直径增大,平均长径比降低。加热处理后,钢中MnS和MnTe充分生长和析出,碲处理对MnS夹杂物的改性效果相比起热处理前更为明显。随着钢中Te/S质量比的增大,夹杂物的平均直径更大、数密度更低、面积分数更高。随着钢中Te/S质量比的升高,MnS-MnTe类夹杂物中树枝状的Ⅱ类比例降低,球形的I类和块状的Ⅲ类比例升高。在当前试验条件下,当钢中Te/S质量比达到0.33时,钢中MnS开始析出温度低于钢液开始凝固温度,有利于抑制共晶反应中在晶界处Ⅱ类MnS的生成。当Te/S质量比大于1.35后,钢中出现较多球形的纯MnTe夹杂物。

关 键 词:碲处理  加热  MnS  MnTe  含硫钢  夹杂物

Evolution of MnS-MnTe inclusions during heating of tellurium treated sulfur-containing steel
HUANG Qiao,REN Ying,ZHANG Li-feng. Evolution of MnS-MnTe inclusions during heating of tellurium treated sulfur-containing steel[J]. China Metallurgy, 2022, 32(7): 57-66. DOI: 10.13228/j.boyuan.issn1006-9356.20210864
Authors:HUANG Qiao  REN Ying  ZHANG Li-feng
Affiliation:1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. School of Mechanical and Materials Engineering, North China University of Technology, Beijing 100144, China
Abstract:The evolution of MnS-MnTe inclusions in tellurium treated high sulfur steel during the heating process was studied through laboratory experiments and thermodynamic calculations. The regularity and mechanism of change for MnS-MnTe inclusions were obtained. With the increase of the tellurium content and the Te/S mass ratio in the steel increased, the average diameter of MnS-MnTe inclusions increased while the average aspect ratio decreased. After heating, since MnS and MnTe in the steel matrix after heating fully grew and precipitated, the effect of modification after tellurium treatment on MnS inclusions was more obvious than that before heating. Meanwhile, compared with inclusions in samples before heating, with the increase of the Te/S mass ratio in the steel, the average diameter of inclusions was larger, the number density was lower and the area fraction was higher. With the increase of Te/S mass ratio in the steel, the proportion of dendritic Type II inclusions decreased while more spherical Type I and massive Type III precipitated in MnS-MnTe inclusions. Under the current experimental condition, after Te/S mass ratio reaching 0.33, the initial precipitation temperature of MnS was lower than the solidus temperature of the liquid steel, which was conducive to inhibit the formation of Type II MnS at the grain boundary during the eutectic reaction. When the Te/S mass ratio was higher than 1.35, numerous spherical pure MnTe inclusions precipitated in the steel matrix.
Keywords:tellurium treatment   heating   MnS   MnTe   sulfur-containing steel   inclusion  
点击此处可从《中国冶金》浏览原始摘要信息
点击此处可从《中国冶金》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号