采用Thermo-Calc软件对耐氯盐腐蚀高Cr钢(8.0%~11.0%)和中Cr钢(3.5%~6.5%)各相摩尔分数,N和Cr在各相中的质量分布进行了计算.结果表明,含N质量分数为0.03% ~0.08%的高Cr钢在837 ~783℃时,析出Cr2N相且N几乎完全固溶其中,有7.8% Cr固溶于α中,0.7% Cr形成M23C6,剩余Cr形成Cr2N;Cr钢在870~ 773℃时,析出CrN相,645℃时CrN转变为Cr2N相,4% Cr固溶于α中,0.7%Cr形成M23C6,剩余Cr形成Cr2N.控制板条马氏体比例95%以上的条件是高Cr钢的临界冷速≥0.5℃/s,中Cr钢的冷速≥10℃/s.在10℃/s冷速下,中Cr钢中存在约3.5%的介于板条马氏体带之间的薄膜状残留奥氏体.为了减少中Cr钢混晶,采用单道次压缩热模拟试验,确立了实验钢的动态再结晶的临界条件,得出变形激活能和应力指数分别为234085 J/mol和1.79,并建立了实验钢的Z参数的表达式.
参考文献
[1] | 托马斯G .具有优异机械性能和腐蚀性能的低碳钢及其制造方法[P].中国,00810210.4,2000-03-28. |
[2] | 库辛斯基G J;伯拉克D;托马斯G .三相复合钢[P].中国,02827964.6,2002-12-12. |
[3] | 马小平,王立军,王园园,秦斌,刘春明,Sundaresa Subramanian.氮对马氏体不锈钢00Cr13Ni4Mo组织和性能的影响[J].材料热处理学报,2012(04):77-84. |
[4] | 邸全康,康永林,王全礼,周玉丽,程四华,郑福印.超快冷工艺下N含量对40Si2MnVTi钢组织与性能的影响[J].材料热处理学报,2013(10):103-108. |
[5] | P.D. Bilmes;M. Solari;C.L. Llorente .Characteristics and effects of austenite resulting from tempering of 13Cr-NiMo martensitic steel weld metals[J].Materials Characterization,2001(4):285-296. |
[6] | 邸全康,康永林,晁月林,周玉丽,程四华,郑福印.经济型Cu-P-Cr耐候钢的显微组织及耐蚀性[J].金属热处理,2013(06):1-5. |
[7] | P. Wang;S.P. Lu;N.M. Xiao;D.Z. Li;Y.Y. Li .Effect of delta ferrite on impact properties of low carbon 13Cr–4Ni martensitic stainless steel[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(13/14):3210-3216. |
[8] | Goetz R L .Seethearaman V modelling dynamic recrystallization using cellular automata[J].Scripta Materialia,1998,38(03):405-413. |
[9] | H.J. McQueen .Development of dynamic recrystallization theory[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(0):203-208. |
[10] | H.J. McQueen;C.A.C. Imbert .Dynamic recrystallization: plasticity enhancing structural development[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2004(1/2):35-43. |
[11] | 王丽君,关小军,赵健,禹宝军,曾庆凯,孙琴,刘千千.HPS485wf桥梁钢奥氏体动态再结晶规律及其本构关系模型[J].材料热处理学报,2010(10):147-151. |
[12] | Y.T.Liu,X.J.Guan,X.M.Shen,X.F.Ma,L.J.Wang.ON THE MONTE CARLO SIMULATION OF NORMAL GRAIN GROWTH[J].金属学报(英文版),2008(04):282-288. |
[13] | 宋仁伯,张永坤,文新理,贾翼速.Nb-B复合高强度集装箱用钢的高温变形行为[J].金属学报,2011(01):34-40. |
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