|
|
|
| Strengthening Mechanism of VN Microalloyed X60 Pipeline Steel Produced by Compact Strip Production Line |
| SU Shihuai1，HE Yizhu2，HU Xuewen1，LIU Xuewei2，WENG Yuqing3 |
| 1. Ma’anshan Iron and Steel Co. Ltd., Ma’anshan 243000, Anhui,China; 2. Anhui University of Technology, Ma’anshan 243002, Anhui,China; 3. The Chinese Society for Metals, Beijing 100711, China |
|
|
|
|
Abstract The microstructure and mechanical properties of vanadiumnitrogen(VN) microalloyed APIX60 pipeline steel(X60) with ultrafine grain and high toughness developed by converter steelmakingcompact strip production(CSP) line were studied to investigate the strengthening mechanism. The results show that the microstructure of the X60 is composed of polygonal ferrite and micro pearlite, the mean size of ferrite grains is less than 5 μm. It was observed that V(C,N) could not precipitate sufficiently in CSP process. The main strengthening mechanism of X60 is grain refining strengthening. The yield strength (YS) increases due to precipitation strengthening of V(C,N) and nonosized inclusion by about 60 MPa and 40 MPa respectively.
|
|
Received: 01 January 1900
|
|
|
|
| [1] |
YANG Geng-wei1,HU Zhuo-li1,YIN Qi-long1,MAO Xin-ping1,2,MIAO Li-sha1,LIU Yang2. Effect of phase transformation time on microstructure and mechanical properties of hotrolled TRIP steel produced by CSP process[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(2): 143-149. |
| [2] |
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. |
| [3] |
CHANG Jinbao,YANG Wen,ZHANG Lifeng,REN Ying. Characteristics and formation mechanism of #br# sulfide in the slab of pipeline steel[J]. Iron and Steel, 2019, 54(8): 154-160. |
| [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] |
XIAO Zunhu,SUI Yafei,LIU Peng,XU Gangjun,LI Ciying. Evolution and control of inclusions in aluminumcontaining on #br# oriented electrical steel through CSP process[J]. Iron and Steel, 2019, 54(7): 42-48. |
| [6] |
TANG Cun-jiang,SHANG Cheng-jia,XIA Dian-xiu,ZHOU Yun,CHEN Yun-bo. Characterization parameters for strain hardening behavior of ferrite/bainite multiphase steel[J]. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(6): 553-562. |
|
|
|
|
2006, Vol. 41 