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.236 北京科技大学学报 第29卷 夹杂物的形状、数量和取向都会影响氢在材料中的 mation.Metall Trans A.1976.7:145 表观扩散系数，对于同一个夹杂物，在相同的氢浓 [6]Kurkela M.Latanision R M.The effect of plastic deformation on 度下它所能捕获氢的能力是一定的，但当氢沿与夹 the transport of hydrogen in nickel.Scripta Metall,1979.13: 927 杂物长度方向垂直扩散时，夹杂物所起到的通道效 [7]Kurkela M.Frankel G S.Latanision R M.et al.Influence of 应远小于氢沿夹杂物长度方向平行扩散时，如图1 plastic deformation on hydrogen transport in 2 1/4 Cr-1 Mo 所示.这是由于当氢沿夹杂物长度方向平行扩散 steel.Scripta Metall,1982,16:455 时，夹杂物对氢输送的距离更大， [8]Hoffman R E.Anisotropy of grain boundary self-diffusion.Acta etall,1956,4:97 3结论 [9]Pressouyre G M,Bernstein I M.A kinetic trapping model for hy drogen induced cracking.Acta Metall,1979.27:89 (l)当MnS夹杂长度取向与氢扩散方向平行 [10]Asaoka T,Dagbert C.Aucouturier M,et al.Quantitive study, 时，钢中的表观扩散系数随MS含量的增加而增 by high-resolution auto-radiography.and degassing at different 加，当MnS夹杂长度取向与氢渗透方向垂直时，氢 temperatures,of the trapping of hydrogen in a Fe-0.15%Ti 在钢中的表观扩散系数随MnS含量的增加而降低， ferrite.Scripta Metall,1977.11:467 [11]Smialowski M.Hydrogen in Steel.New York:Pergamon (②)有限元计算表明，对于具有扩散通道效应 Press,1962:327 和陷阱效应的第二相，它对氢扩散的影响取决于扩 [12]褚武扬.氢损伤和滞后断裂.北京：冶金工业出版社，1988： 散通道效应和陷阱效应的强弱以及第二相的形状、 85 数量和取向，对本文所模拟的第二相，当它的取向 [13]Luu W C.Wu J K.Effects of sulfide inclusion on hydrogen 与氢扩散方向平行时能促进氢扩散，当取向与氢扩 transport in steels.Mater Lett.1995.24:175 [14]Chou K C,Szklarska Smialowska Z.Comparison of the behavior 散方向垂直时能阻碍氢的扩散 of hydrogen in two carbon steels differing in sulfur content.Cor 参考文献 rosion,1990,46(2):118 [15]lino M.Trapping of hydrogen by sulfur associated defects in [1]Oriani R A.The diffusion and trapping of hydrogen in steel.Acta steel.Metall Trans A.1985,16:401 Meta,1970,18:147 [16]Garet M.Brass A M.Haut C.et al.Hydrogen trapping on non [2]Menabb A.Foster P K.A new analysis of the diffusion of hydro- metallic inclusions in Cr Mo low alloy steels.Corros Sci.1998. gen in iron and ferrite steels.Trans Metall Soc AIME.1963. 40:1073 227:618 [17]Pumphrey P H.The role of sulfide inclusions in hydrogen entry [3]Hirth JP.Effects of hydrogen on the properties of iron and steel. during the exposure of steels to acids.Corrosion.1980.36 Metall Trans A.1980.11:861 (10):537 [4]Kumnick A J.Johnson HH.Deep trapping states for hydrogen in [18]Evans G M,Rollason E C.Influence of non metallie inclusions deformed iron.Acta Metall.1980.28:33 on the apparent diffusion of hydrogen in ferrous materials.JIron [5]Donovan JA.Sorption of tritium by nickel during plastic defor- Steel Inst,1969,207:1484 Effect of MnS inclusions on hydrogen diffusion in steel REN Xuechong,CHU Wuyang:LI Jinxue,QIAO Lijie,SU Yanjing Materials Science and Engineering School.University of Science and Technology Beijing.Beijing 100083,China ABSTRACI The effect of MnS inclusions on hydrogen diffusion in steel was investigated by experiment and fi- nite element method(FEM).The results show that with increasing MnS inclusion content the appearance diffu- sivity of hydrogen in steel increases when the elongated inclusions parallel to the direction of permeation and de- creases when perpendicular to the direction of permeation.If the inclusions can both transport and trap hydro- gen,the effect of inclusion on hydrogen diffusion in steel is determined by their strength of transportation and trap,density,figure and orientation. KEY WORDS steel;hydrogen:diffusion;MnS inclusion夹杂物的形状、数量和取向都会影响氢在材料中的 表观扩散系数．对于同一个夹杂物在相同的氢浓 度下它所能捕获氢的能力是一定的但当氢沿与夹 杂物长度方向垂直扩散时夹杂物所起到的通道效 应远小于氢沿夹杂物长度方向平行扩散时如图1 所示．这是由于当氢沿夹杂物长度方向平行扩散 时夹杂物对氢输送的距离更大． 3 结论 （1） 当 MnS 夹杂长度取向与氢扩散方向平行 时钢中的表观扩散系数随 MnS 含量的增加而增 加．当 MnS 夹杂长度取向与氢渗透方向垂直时氢 在钢中的表观扩散系数随 MnS 含量的增加而降低． （2） 有限元计算表明对于具有扩散通道效应 和陷阱效应的第二相它对氢扩散的影响取决于扩 散通道效应和陷阱效应的强弱以及第二相的形状、 数量和取向．对本文所模拟的第二相当它的取向 与氢扩散方向平行时能促进氢扩散当取向与氢扩 散方向垂直时能阻碍氢的扩散． 参 考 文 献 ［1］ Oriani R A．The diffusion and trapping of hydrogen in steel．Acta Metall197018：147 ［2］ Mcnabb AFoster P K．A new analysis of the diffusion of hydrogen in iron and ferrite steels．Trans Metall Soc AIME1963 227：618 ［3］ Hirth J P．Effects of hydrogen on the properties of iron and steel． Metall Trans A198011：861 ［4］ Kumnick A JJohnson H H．Deep trapping states for hydrogen in deformed iron．Acta Metall198028：33 ［5］ Donovan J A．Sorption of tritium by nickel during plastic deformation．Metall Trans A19767：145 ［6］ Kurkela MLatanision R M．The effect of plastic deformation on the transport of hydrogen in nickel．Scripta Metall197913： 927 ［7］ Kurkela MFrankel G SLatanision R Met al．Influence of plastic deformation on hydrogen transport in 21／4 Cr—1 Mo steel．Scripta Metall198216：455 ［8］ Hoffman R E．Anisotropy of grain boundary self-diffusion．Acta Metall19564：97 ［9］ Pressouyre G MBernstein I M．A kinetic trapping model for hydrogen-induced cracking．Acta Metall197927：89 ［10］ Asaoka TDagbert CAucouturier Met al．Quantitive study by high-resolution auto-radiographyand degassing at different temperaturesof the trapping of hydrogen in a Fe—0∙15％ Ti ferrite．Scripta Metall197711：467 ［11］ Smialowski M． Hydrogen in Steel． New York： Pergamon Press1962：327 ［12］ 褚武扬．氢损伤和滞后断裂．北京：冶金工业出版社1988： 85 ［13］ Luu W CWu J K．Effects of sulfide inclusion on hydrogen transport in steels．Mater Lett199524：175 ［14］ Chou K CSzklarska-Smialowska Z．Comparison of the behavior of hydrogen in two carbon steels differing in sulfur content．Corrosion199046（2）：118 ［15］ Iino M．Trapping of hydrogen by sulfur associated defects in steel．Metall Trans A198516：401 ［16］ Garet MBrass A MHaut Cet al．Hydrogen trapping on non metallic inclusions in Cr—Mo low alloy steels．Corros Sci1998 40：1073 ［17］ Pumphrey P H．The role of sulfide inclusions in hydrogen entry during the exposure of steels to acids．Corrosion198036 （10）：537 ［18］ Evans G MRollason E C．Influence of non-metallic inclusions on the apparent diffusion of hydrogen in ferrous materials．J Iron Steel Inst1969207：1484 Effect of MnS inclusions on hydrogen diffusion in steel REN XuechongCHU W uyangLI JinxueQIAO L ijieSU Y anjing Materials Science and Engineering SchoolUniversity of Science and Technology BeijingBeijing100083China ABSTRACT The effect of MnS inclusions on hydrogen diffusion in steel was investigated by experiment and finite element method （FEM）．The results show that with increasing MnS inclusion content the appearance diffusivity of hydrogen in steel increases when the elongated inclusions parallel to the direction of permeation and decreases when perpendicular to the direction of permeation．If the inclusions can both transport and trap hydrogenthe effect of inclusion on hydrogen diffusion in steel is determined by their strength of transportation and trapdensityfigure and orientation． KEY WORDS steel；hydrogen；diffusion；MnS inclusion ·236· 北 京 科 技 大 学 学 报 第29卷