终轧温度对2205/Q235B双相不锈钢复合板组织和性能的影响

doi:10.11896/cldb.19070210

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Abstract Based on the 2205 duplex stainless steel and Q235B mild steel as the research object, the Gleeble3800 hot simulation experiment machine was used to compress them into a clad plate. The influence law of the final rolling temperature on the microstructure, shear strength and corrosion resistance of the 2205/Q235B duplex stainless steel clad plate was investigated by the optical microscope (OM), scanning electron microscope (SEM), mechanical and electrochemical performance testing. The results showed that, under the certain reduction ratio, 2205 and Q235B could obtain a good bonding interface when the final rolling temperature was within the range of 850—970 ℃. A long austenitic strip was formed on the side of 2205 near the interface, and the decarburization zone with width of 39.1—47.4 μm was formed on the side of Q235B. With the decrease of the final rolling temperature, the shear strength of 2205/Q235B duplex stainless steel clad plate was significantly increased. When the final rolling temperature was 850 ℃, its shear strength was the highest, reaching 445 MPa. With the increase of the final rolling temperature, the δ ferritic content of 2205 duplex stainless steel was increased gradually. The δ ferritic content of the 2205 stainless steel reached the maximum value of 45.3% at 970 ℃, thus leading to the best corrosion resistance of the surface. However, with the increase of the final rolling temperature, the corrosion pit width of carbon steel side at the interface of 2205/Q235B increased from 35.56 μm to 49.44 μm. Therefore, the corrosion protection of the cross-section should be paid attention to.

Key words： 2205/Q235B clad steel plate final rolling temperature ferrite polarization curve shear strength

Published: 24 July 2020

CLC number:

TG335.81

Fund:This work was financially supported by Shandong Taishan Industry Leading Talents Project (SF1503302301).

About author:: Fengqiang Xiaoreceived his M.S. degree in June 2007 from University of Science and Technology Beijing. Since September 2014, he learned at the College of Materials Science and Engineering in Tianjin University, focusing on the preparation of duplex stainless steel composite plate and the research of friction stir welding technology.
Dongpo Wang, professor, School of Materials Science and Engineering, Tianjin University. He received his Ph.D. degree in material processing engineering from Tianjin University in January 2000. He mainly engaged in welding structural fracture and strength research works and carried out a series of basic theory and applied technology research on aerospace, oil and gas pipeline, offshore drilling platform and other fields. Now, he has published 220 articles and applied for more than 80 patents.

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	XIAO Fengqiang
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Cite this article:

XIAO Fengqiang,WANG Dongpo,HU Wenbin, et al. Effect of Final Rolling Temperature on Microstructure and Properties of 2205/Q235B Duplex Stainless Steel Clad Plate[J]. Materials Reports, 2020, 34(16): 16119-16124.

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http://www.mater-rep.com/EN/10.11896/cldb.19070210 OR http://www.mater-rep.com/EN/Y2020/V34/I16/16119

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