Effect of zirconium addition on the austenite grain coarsening behavior and mechanical properties of 900 MPa low carbon bainite steel |
| |
| Authors: | Jia Guo Aimin Guo Hui Guo Ying Wang Jing Li Xinlai He |
| |
| Affiliation: | [1]School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China [2]School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China |
| |
| Abstract: | The ultra-free bainitic microstructure of a 900 MPa low carbon bainitic Cu-Ni-Mo-B steel was obtained by a newly developed relaxation precipitation control (RPC) phase transformation processing.In a pan-cake like prior-anstenite grain,the microstructure consisted of lath bainite,a little of abnormal granular bainite,and acicular ferrite.The effect of zirconium carbonitrides on the austenite grain coarsening behavior was studied by transmission electron microscopy (TEM).The results show that,the lath is narrower with increasing cooling rate.The ratio of all kinds of bainitic microstructure is proper with the intermediate cooling rate;and Zr-containing precipitates distribute uniformly,which restrains austenite grain growing in heat-affected welding zone. |
| |
| Keywords: | low carbon bainitic steel zirconium precipitates relaxation precipitation control (RPC) technique |
| 本文献已被 CNKI 维普 万方数据 ScienceDirect 等数据库收录！ |
|
