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| Corner Cracking of AlKilled SS400 Slab and Countermeasures |
| SUN Qisong1,WANG Xinhua1,JIANG Dongcai2,BAI Xuejun2,ZHU Zhiyuan3 |
| 1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Technology and Quality Department, Shouqin Metal Materials Co., Ltd., Qinhuangdao 066001, Hebei, China;3. Technology Academy, Shougang Group, Beijing 100041, China |
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Abstract To investigate corner cracking of Alkilled SS400 slab, the high temperature mechanical properties and corner temperature of slab in straightening zone were measured.The samples were studied by metallography and the surface of crack was analyzed by SEM.The conclusions are: intergranular embrittlement at 800 ℃ is caused by austeniteferrite transition and the precipitation of AlN.So straightening near 800 ℃ is the reason of intergranular corner cracking of slab.The distribution of secondary cooling water in width direction of slab was studied. Based on the results of test, the nozzle arrangement in secondary cooling zone was changed to increase corner temperature and avoid corner cracking.
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Received: 01 January 1900
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| [1] |
XU Li-ping，WANG Hong-feng. Research and practice on corner scarring defect of continuous casting slabs[J]. , 2019, 44(1): 40-43. |
| [2] |
JIANG Li-mei，LIU Qing-gang. Research and Improvement of edge cracking of J55 slab[J]. , 2018, 43(2): 41-45. |
| [3] |
TANG Wei，MENG Ling-tao， SUN Li-bin， BU Zhi-sheng， LI You-huai， WANG Lei， DOU Kun， HAN Yan-shen， LIU Qing. Cause analysis and improving measures of central crack in continuous casting slab of Q235B steel[J]. , 2017, 42(5): 59-65. |
| [4] |
LIU Ke,SUN Qi-song,WANG Li-feng,ZHANG Jia-quan. Optimum total soft reduction amount for continuous casting slab with different thickness[J]. Chinese Journal of Iron and Steel, 2017, 29(2): 111-116. |
| [5] |
ZHANG Jian-jun，，ZHANG Hui，XI Chang-suo，TAN Wen，WANG Chun-feng. Analysis and control of transverse corner cracking formation on middle carbon steel in thin slab casting[J]. Iron and Steel, 2017, 52(11): 32-36. |
| [6] |
FAN Xing-chen. Research on improving the surface quality of 400mm ultra-thick slabs with the technology of 3D sprays[J]. , 2017, 42(06): 50-52. |
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2007, Vol. 42 
