含复合(Ti,Mo)C析出相的马氏体钢的氢捕获与解吸附  

Hydrogen Trapping and Desorption in a Martensitic Steel with Mixed(Ti,Mo)C Precipitates

作　　者：靳晓坤 徐乐[2] 尉文超 姚可夫[3] 时捷[2] 王毛球[2] Jin Xiaokun;Xu Le;Yu Wenchao;Yao Kefu;Shi Jie;Wang Maoqiu(Central Iron and Steel Research Institute(ClSRI),Beijing 100081,China;Tsinghua University,Beijing 100084,China;Institute for Special Steels,Central Iron and Steel Research Institute(CISRI),Beijing 100081,China)

机构地区：[1]钢铁研究总院特钢所,北京100081 [2]钢铁研究总院,北京100081 [3]清华大学,北京100084

出　　处：《稀有金属材料与工程》2020年第6期1901-1906,共6页Rare Metal Materials and Engineering

基　　金：National Key Research and Development Program(2016YFB0300104,2016YFB0300102,2017YFB0304802)。

摘　　要：采用热脱氢分析装置(TDS)研究了含复合(Ti,Mo)C析出相的马氏体钢的氢的捕获与解吸附行为。结果表明,36~60 nm的未溶球形(Ti,Mo)复合析出相在室温电化学充氢过程中不能捕获氢,而回火析出的1~5 nm的复合(Ti,Mo)C析出相是有效的氢陷阱,尽管其氢陷阱激活能相对较低,为16.4~22.1k J/mol,与晶界、位错处的氢陷阱激活能相近,同时远低于纯的共格Ti C析出相的氢陷阱激活能,但在大气中放置时,被回火析出的1~5 nm的复合(Ti,Mo)C析出相捕获的氢无法解吸。Hydrogen trapping and desorption in a martensitic steel with mixed(Ti,Mo)C precipitates have been investigated by thermal desorption spectrometry(TDS)analyzer.Results indicate that the spherical(Ti,Mo)C precipitates of 36~60 nm could not absorb hydrogen during electrochemical charging,while the(Ti,Mo)C precipitates of 1~5 nm are effective hydrogen trapping sites.In spite of a relatively low desorption activation energy of 16.4~22.1 k J/mol,which is far lower than that from pure coherent Ti C,the hydrogen trapped by the fine(Ti,Mo)C carbides could not desorb during atmospheric exposure.

关 键 词：马氏体钢 (Ti Mo)C析出相 氢陷阱 热脱氢分析 

分 类 号：TG142.24[一般工业技术—材料科学与工程]