采用TDS方法研究了氢在两种马氏体钢中的扩散行为,结果发现氢在高铬低铝的D2钢中的扩散显著低于低铬无铝的D1钢。从充氢试样室温放置时氢体积分数下降规律可知,氢在D1钢和D2钢中的扩散系数分别为1.52×10-7和5.3×10-8cm2/s。D2钢中存在大量细小的碳化物,既对氢的扩散起到阻碍作用,降低氢的扩散系数,又可作为氢陷阱,使氢含量增加。D2钢的氢脆敏感性低于D1钢。
Hydrogen transport in two martensitic steels was investigated by means of thermal desorption spectrometry.Results show that hydrogen in the steel with a high Cr and low Al content transports obviously more slowly than in the steel with a low Cr and minor Al content.The diffusion coefficient of hydrogen in the D1 steel was determined to be 1.52×10-7 cm2/s,while that in the D2 steel was 5.3×10-8 cm2/s,from the variation of the hydrogen content in the hydrogen charged specimen with exposing time at ambient temperature.There were a large number of fine carbides in the D2 steel,which can prevent hydrogen from diffusing and reduce the hydrogen diffusion coefficient,and they may also act as hydrogen trap sites and increase the hydrogen content charged.Thus,the hydrogen embrittlement susceptibility of the D2 steel is lower than that of the D1 steel.
参考文献
| [1] | Troiano A R .The Role of Hydrogen and Other Interstitials in the Mechanical Behavior of Metals[J].Transactions of ASM,1960,52:54. |
| [2] | Akhurst K N;Baker T J .The Threshold Stress Intensity for Hydrogen-lniduced Crack Growth[J].Metallurgical and Materials Transactions,1985,12A(06):1059. |
| [3] | Endos D G;Seully J R .A Critical Stain Criterion for Hydrogen Embrittlement of Cold-Drawn,Ultrafine Pearlitic Steel[J].Metallurgieal and Materials Transactions,2002,33A(04):1151. |
| [4] | Y. Kimura;Y. Sakai;T. Hara;A. Belyakov;K. Tsuzaki .Hydrogen induced delayed fracture of ultrafine grained 0.6% O steel with dispersed oxide particles[J].Scripta materialia,2003(11):1111-1116. |
| [5] | Fu-Gao WEI;Toru HARA;Takehiro TSUCHIDA .Hydrogen Trapping in Quenched and Tempered 0.42C-0.30Ti Steel Containing Bimodally Dispersed TiC Particles[J].ISIJ International,2003(4):539-547. |
| [6] | Nagumo M .Hydrogen related failure of steels - a new aspect[J].Materials Science and Technology: MST: A publication of the Institute of Metals,2004(8):940-950. |
| [7] | WANG Mao-qiu;Akiyama Eiji;Kaneaki Tsuzaki .Hydrogen Effect on the Fracture Behavior of High-Strength Cr-Mo Steel[J].Materials Science Forum,2006,512:55. |
| [8] | 田野,王毛球,李金许,时捷,惠卫军,董瀚.新型渗氮钢的力学性能及渗氮特性[J].材料热处理学报,2008(03):122-125. |
| [9] | Gerberich W W;CHEN Y T .Hydrogen-Controlled Cracking--An Approach to Threshold Stress Intensity[J].Metallurgical and Materials Transactions,1975,6A(02):271. |
| [10] | Filho, C.J.C.;Mansur, M.B.;Modenesi, P.J.;Gonzalez, B.M. .The effect of hydrogen release at room temperature on the ductility of steel wire rods for pre-stressed concrete[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2010(18/19):4947-4952. |
| [11] | 郭海丁,田锡唐.塑性形变对4340钢中氢的富集及传输行为影响[J].腐蚀科学与防护技术,1995(01):47. |
| [12] | TsuchidaT;HoruT;TsuzakiK .V添加高强度钢の水素吸收举动と微钿组织の哄系[J].Tesu-to Hagane,2002,88(11):771. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%