LZ45CrV车轴钢氢扩散行为及氢鼓泡探究
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摘要
为了探究LZ45Cr V车轴钢与氢的交互作用,采用Devanathan电化学充氢技术测量了LZ45Cr V车轴钢的氢扩散系数,通过偏振光显微镜观察了氢鼓泡特征,研究了组织结构对氢扩散行为的影响。结果表明:LZ45Cr V车轴钢25°C下的氢扩散系数为1.101×10~(-6)cm~2/s,其细化的金相组织以及较大铁素体中析出的VC粒子,大幅增加了钢中的氢陷阱数量,从而使得LZ45Cr V车轴钢具有较低的氢扩散系数和较高的产生氢鼓泡临界可扩散氢浓度。
Devanathan electrochemical hydrogen charging technology was used to measure hydrogen diffusion coefficient of LZ45Cr V axle steel,and the polarization microscope was used to observe the hydrogen blistering characters.Besides,the effects of the microstructure on the hydrogen diffusion behavior of LZ45Cr V axle steel were also studied.Results indicated that the hydrogen diffusion coefficient of LZ45Cr V axle steel was 1.101×10~(-6)cm~2/s at 25°C.The number of hydrogen traps in the LZ45Cr V axle steel was remarkably increased owing to the refined microstructures and the precipitated VC particles of the large ferrite.Therefore,the low hydrogen diffusion coefficient and high critical diffusible hydrogen content of hydrogen blistering were obtained for the LZ45Cr V axle steel.
Devanathan electrochemical hydrogen charging technology was used to measure hydrogen diffusion coefficient of LZ45Cr V axle steel,and the polarization microscope was used to observe the hydrogen blistering characters.Besides,the effects of the microstructure on the hydrogen diffusion behavior of LZ45Cr V axle steel were also studied.Results indicated that the hydrogen diffusion coefficient of LZ45Cr V axle steel was 1.101×10~(-6)cm~2/s at 25°C.The number of hydrogen traps in the LZ45Cr V axle steel was remarkably increased owing to the refined microstructures and the precipitated VC particles of the large ferrite.Therefore,the low hydrogen diffusion coefficient and high critical diffusible hydrogen content of hydrogen blistering were obtained for the LZ45Cr V axle steel.
引文
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[6]吴毅,刘鑫贵,项彬,等.重载铁路货车用LZ45Cr V车轴钢综合性能的试验研究[J].中国铁道科学,2015,36(2):68-72.
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[12]DEVANATHAN M A V,STACHURSKI Z.The mechanism of hydrogen evolution on iron in acid solutions by determination of permeation rates[J].Journal of the Electrochemical Society,1964,111(5):619-623.
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[16]MENDIBIDE C,SOURMAIL T.Composition optimization of high-strength steels for sulde stress cracking resistance improvement[J].Corros Sci,2009,51(12):2 878-2 884.
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[18]文波.碳化钒在Fe-C-V微合金钢中的析出行为研究[D].重庆:重庆大学,2011:54-60.
[19]YANG B,ZHAO Y X.Experimental research on dominant effective short fatigue crack behavior for railway LZ50 axle steel[J].International Journal of Fatigue,2012,35(1):71-78.
[2]XUE A S,ZHAO Y X,DU B B.Design reliability assessment on the railway wagon axle with 30 ton axle weight[J].Advanced Materials Research,2013,658(1):323-326.
[3]HUI W,ZHANG Y,SHAO C,et al.Microstructural effects on high-cycle fatigue properties of microalloyed medium carbon steel 38Mn VS[J].Materials Science&Engineering A,2015,640(7):147-153.
[4]靖宏志,付祥,刘涛.提高LZ50钢车轴屈服强度的热处理工艺措施[J].机车车辆工艺,2013(3):22-23.
[5]王梦.热处理工艺对车轴钢LZ45Cr V性能的影响[D].上海:上海交通大学,2013:40-42.
[6]吴毅,刘鑫贵,项彬,等.重载铁路货车用LZ45Cr V车轴钢综合性能的试验研究[J].中国铁道科学,2015,36(2):68-72.
[7]刘占东,马忠存.LZ50钢力学性能试验研究[J].大型铸锻件,2014(1):20-26.
[8]KRUG E C,FRINK C R.Acid rain on acid soil:A new perspective[J].Science,1983,217(4 610):520-525.
[9]褚武扬.氢损伤和滞后断裂[M].北京:冶金工业出版社,1988:254-259.
[10]HONG G W,LEE J Y.The interaction of hydrogen and the cementite-ferrite interface in carbon steel[J].Journal of Materials Science,1983,18(1):271-277.
[11]HAGI H.Effect of interface between cementite and ferrite on diffusion of hydrogen in carbon steels[J].Materials Transactions,JIM,1994,35(3):168-173.
[12]DEVANATHAN M A V,STACHURSKI Z.The mechanism of hydrogen evolution on iron in acid solutions by determination of permeation rates[J].Journal of the Electrochemical Society,1964,111(5):619-623.
[13]PRESSOUYRE G M,BERNSTEIN I M.An example of the effect of hydrogen trapping on hydrogen embrittlement[J].Metallurgical Transactions A,1981,12(5):835-844.
[14]戴起勋.金属材料学:第2版[M].北京:化学工业出版社,2012:44-45.
[15]LUU W C,WU J K.The influence of microstructure on hydrogen transport in carbon steels[J].Corrosion Science,1996,38(2):239-245.
[16]MENDIBIDE C,SOURMAIL T.Composition optimization of high-strength steels for sulde stress cracking resistance improvement[J].Corros Sci,2009,51(12):2 878-2 884.
[17]CHARBONNIER J C,MARGOT-MARETTE H,BRASS A M,et al.Sulfide stress cracking of high strength modified Cr-Mo Steels[J].Metall Mater Trans A,1985,16(5):935-944.
[18]文波.碳化钒在Fe-C-V微合金钢中的析出行为研究[D].重庆:重庆大学,2011:54-60.
[19]YANG B,ZHAO Y X.Experimental research on dominant effective short fatigue crack behavior for railway LZ50 axle steel[J].International Journal of Fatigue,2012,35(1):71-78.