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Acta Metall Sin  2010, Vol. 46 Issue (6): 723-728    DOI: 10.3724/SP.J.1037.2009.00501
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SURFACE CRAZING OF Mn–Cu WEATHERING STEEL
WANG Lei 1; ZHANG Sixun 2; DONG Junhua 1; KE Wei 1; LIU Chunming 2
1. State Key Laboratory for Corrosion and Protection; Institute of Metal Research; Chinese Academy of Sciences; Shenyang 110016
2. Institute of Materials and Metallurgy; Northeast University; Shenyang 110819
Cite this article: 

WANG Lei ZHANG Sixun DONG Junhua KE Wei LIU Chunming . SURFACE CRAZING OF Mn–Cu WEATHERING STEEL. Acta Metall Sin, 2010, 46(6): 723-728.

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Abstract  

Craze cracks and oxidation appeared on the surfaces of the Mn–Cu weathering steel samples after different soaking times at 1260 ℃in the oxidizing conditions. EPMA result shows that Cu enriches at the interface of matrix/scale, Cu concentration in pearite is higher than that in ferrite. OM observaion shows that decarbonization phenomenon occurred near surface of steel after soaking in high temperature experiments, which resulted in an obvious decrease of pearlite amount, so more Cu segregation in grain oundaies and formed Cu–enriched phase, and caused serous surface crazing at last. Hoever, under the educing conditionthe craze crack phenomenon did not occur after soaking

Key words:  Mn-Cu weathering steel      surface crazing      soaking      decarbonization     
Received:  21 July 2009     
Fund: 

Supported by National Basic Research Program of China (No.2004CB619101) and National Natural Science Foundation of China (Nos.50499336 and 50971120)

URL: 

https://www.ams.org.cn/EN/10.3724/SP.J.1037.2009.00501     OR     https://www.ams.org.cn/EN/Y2010/V46/I6/723

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