Received date: 2009-07-21
Revised date: 2009-11-13
Online published: 2010-06-11
Supported by
Supported by National Basic Research Program of China (No.2004CB619101) and National Natural Science Foundation of China (Nos.50499336 and 50971120)
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
YU Lei . SURFACE CRAZING OF Mn–Cu WEATHERING STEEL[J]. Acta Metall Sin, 2010 , 46(6) : 723 -728 . DOI: 10.3724/SP.J.1037.2009.00501
[1] Chen X H, Dong J H, Han E H, Ke W. Chin Pat, ZL200510045624.6, 2005
(陈新华, 董俊华, 韩恩厚, 柯 \ \ 伟. 中国专利, ZL20051004-5624.6, 2005)
[2] Speller F N. Corrosion, Causes and Prevention. 3rd Ed., New York: McGraw–Hill Book Company, 1951: 106
[3] Townsend H E. Corrosion, 2001; 57: 497
[4] Hou W T, Liang C F. Corrosion, 2004; 60: 313
[5] Kumar V, Chaudlhuri S K. Corros Rev, 2003; 21: 293
[6] Bauer O. Stahl Eisen, 1921; 41: 37
[7] Gertsman S L, Tardif H P. Iron Age, 1952; 169: 136
[8] Nicholson A, Murray J D. J Iron Steel Inst, 1965; 203: 1007
[9] Habraken L, Lecomte–Beckers J. Copper in Iron and Steel. New York: John Wiley & Sons Inc., 1982: 45
[10] Salter W J M. J Iron Steel Inst, 1966; 204: 478
[11] Chen X H, Dong J H, Han E H, Ke W. J Mater Sci Technol , 2007; 23: 307
[12] Melford D A. J Iron Steel Inst, 1962; 200: 290
[13] Akamatsu S, Senuma T, Takada Y, Hasebe M. Mater Sci Technol, 1999; 15: 1301
[14] Imai N, Komatsubara N, Kunishige K. J Iron Steel Inst, 1997; 37: 224
[15] Li X C, Chen G, Zhu W X, Chen C B, Mei D S. Trans Chin Soc Agri Mach. 2003; 34: 138
(李新城, 陈光, 朱伟兴, 陈长白, 梅东生. 农业机械学报, 2003; 34: 138)
/
| 〈 |
|
〉 |
