Abstract:As one of the essential factors, the microstructure of oxide scales on the duplex stainless steel 2205, is crucial for pickling quality of the hot rolled strips. The investigation and analysis process of the microstructure of different oxide scales on the duplex stainless steel 2205 by OM, SEM and XRD was illustrated. The results show that a lot of cracks were presented on the oxide scales of hot rolled strip, accompanied by local oxide scales falling off, which helped enhancing the pickling speed; the thickness of different scales was about 10 μm. However, the increasing of scale thickness and the surface roughness between the oxide scales and metallic substrates in local region caused difficult pickling of oxide scales; the complex and multiple phase composition (remained Fe2SiO4 and Cr2O3·FeO ) of oxide scales led to more challenging process of pickling duplex stainless steel 2205.
王院生, 李海丰, 王钧, 熊计. 时效对2205双相不锈钢?析出相的影响[J].热加工工艺2011,40(8):172-174.(Wang Yuansheng, Li Haifeng, Wang Jun, Xiong Ji. Effects of Aging on s-phase Precipitation of 2205 Duplex Stainless Steel [J]. Material & Heat Treatment ,2011,40(8) :172-174.)
[1]
王院生, 李海丰, 王钧, 熊计. 时效对2205双相不锈钢?析出相的影响[J].热加工工艺2011,40(8):172-174.(Wang Yuansheng, Li Haifeng, Wang Jun, Xiong Ji. Effects of Aging on s-phase Precipitation of 2205 Duplex Stainless Steel [J]. Material & Heat Treatment ,2011,40(8) :172-174.)
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王银军,穆海玲,董汉君,李欣波,张国河,沈鹏杰,杜献智,.SPHC热带氧化铁皮酸洗困难原因分析及对策[J].轧钢2006,23(4):51-54.(Wang Yinjun, Mu Hailing, Dong Hanjun, Li Xinbo, Zhang Guohe, Shen Pengjie, Du Xianzhi. Cause Analysis of Difficult Pickling of Oxide Scale of SPHC Hot Rolled Strip and Its Countermeasures [J]. Steel Rolling,2006,23(4) :51-54.)
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R.Y.Chen and W.Y.D.Yuen. Improvement of pickling characteristics of hot-rolled strip through heat Treatment of the oxide scale[A].44th MWSP Conference Proceeding[C],Warrendal,2002:1057-1067.
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