|
|
|
| Analysis of CCT curve of steel for automobile hollow stabilizer bar |
| LIU Yang,GU Hairong,WANG Yongguo,LU Qianqian,JIN Jiachun |
| Technology Center, Maanshan Iron and Steel Co., Ltd., Ma′anshan 243003, China |
|
|
|
Abstract The thermal expansion curves of 34MnB5 steel at different cooling rates were measured by DIL805A/D thermal expansion instrument. Ac1 and Ac3 were measured according to the experimental data. By combining the metallographic method and the hardness method, the austenite continuous cooling transformation curve (CCT curve) of the experimental steel was drawn. The structure transformation and hardness change of the experimental steel at different cooling rates were analyzed. The results showed that: when the cooling rate was slower than 3 ℃/s, the phase transition products mainly included ferrite and pearlite structures, and the average microhardness was 223.7HV; when the cooling rate was in range of 315 ℃/s, the phase transition products mainly included the mixed structures of bainite and martensite; when the cooling rate was fast and higher than 15 ℃/s, the single phase martensite structure was formed, and the average microhardness was 552.7HV.
|
|
Received: 26 May 2020
|
|
|
|
| [1] |
LU Qianqian，GU Hairong，CUI Lei，WANG Yongguo，JIN Jiachun. Discussion about phase transformation and heat treatment[J]. PHYSICS EXAMINATION AND TESTING, 2021, 39(2): 10-. |
| [2] |
CAO Jing-hua1,PAN Hong-bo2,3,ZHANG Jing1,ZHANG Teng-fei2,LI Xu-dong2,LIU Wei-ming2,3. Continuous cooling transformation of NbTi microcarbon deep drawing dualphase steel[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(4): 322-328. |
| [3] |
YI Hang1,YANG Geng-wei1,MAO Xin-ping1,2,ZHAO Gang1,XU Yao-wen1,BAO Si-qian1. Effect of deformation temperature on phase transformation behavior of hot rolled 65Mn steel produced by CSP process[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(1): 74-80. |
| [4] |
YANG Geng-wei,LU Jia-wei,SUN Hui,FANG Zi-wei,ZHOU Yi-liao,YAO Nan. Microstructure, mechanical properties and phase transformation behavior of TiV microalloyed highstrength hotstrip steel[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(8): 726-732. |
| [5] |
LIU Jihao, CHI Hongxiao, CAO Jianchun, ZHOU Jian, MA Dangshen, LIN Peng. High temperature phase transition behavior of Cr12Mo1V1 steel[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(5): 500-506. |
| [6] |
ZHOU Cheng， ZHAO Tan， ZHU Long-hao，JIN Yao-hui， LI Jia-an. Effect of TMCP on microstructure evolution and mechanical properties of low-carbon Ni-Nb steel[J]. Iron and Steel, 2019, 54(4): 68-72. |
|
|
|
|
2021, Vol. 39 
