Tiと炭素鋼の接合性と界面反応

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A study was done in order to get the preferable interface strength in a cladding of titanium to carbon steel from the view point of diffusion of metallic elements and the formation of intermetallic compounds. The formation of titanium carbide lowered the interfacial strength in a direct cladding of titanium to steel. In the case of cladding of titanium to steel with an insert metal of nickel, the intermetallic compounds of Ni_3Ti, NiTi and NiTi_2 were observed at the bonding interface of Ni/Ti. The voids which were thought to be induced by Kirkendal effect were also observed at Ni/Ni_3Ti layer. Holding a long time at elevated temperature lowered the interfacial strength due to the formation of wide intermetallic compounds which grew according to the parabolic law. In the case of cladding of titanium to steel with the insert metal of pure iron, the intermetallic compounds of Fe_2Ti and FeTi were observed at the bonding interface of Fe/Ti. However, the growth rate of these intermetallic compounds was quite small compared with that in the case of Ni/Ti system. From the analysis of Ti/Fe/carbon steel joint heated up to an elevated temperature after rolling, the TiC as well as Fe-Ti intermetallic compounds were formed along the bonding interface because the carbon atoms diffuse from the carbon steel through the insert metal of Fe. Therefore, the carbon steel/Ni/Fe/titanium system was useful to get the preferable interface strength in the cladding of titanium to carbon steel.
社団法人日本鉄鋼協会の論文
1988-09-01

Tiと炭素鋼の接合性と界面反応

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