同径丸棒継手の摩擦圧接における摩擦面の熱収支について

概要

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The authors have been studying the friction welding phenomena of same diameter bars and of different diameter bars of SUS304 austenitic stainless steel by brake type friction welding equipment. In any case, friction torque, burn-off rate and temperature of friction surface are close to the constant value, while constant axial pressure and friction speed are maintained. This may mean that equsai steady state arises at the friction surface. And, these three constant values might signify the thermal balance. In this study, following relationship of thermal balance were assumed. Q_1=Q_3+Q_4+ΔQ Q_1 means the friction heat, that is a function of friction torque. Q_3 is the removed heat by thermal conduction, so it is in proportion to temperature gradient. Q_4 means the heat removed with upset collar, this factor depends on burn-off rate and temperature at friction surface. And, ΔQ includes generated heat by defomation and relesed heat to the airs. Relation between Q_1 and Q_4 was examined by studying the mutual relationship among three constant values of steady state in the same diameter bar friction welding of 10 acd;20mm. And Q_3 was examined by the extrapolation of Q_1 and Q_4 relation. This value of Q_3 was nearly the same value of Q_3 from the calculation of thermal conduction. Assumed relationship was sufficiently adapted for experimental data.
社団法人溶接学会の論文
1982-02-05