A dynamic measurement system of molten pool liquid metal surface tension was established based on the principle of weld pool oscillation.The effect of three typical oxide fluxes on the surface tension of the molten pool under the action of the TIG arc heat source was investigated.It was found that the introduction of oxides does not have a significant effect on overall arc temperature.However,it would cause the average surface tension temperature gradient of liquid metal in molten pool to change from negative to positive,and the surface tension temperature gradient of molten pool is related to the melting point of the oxide.The lower the oxide melting point,the larger the surface tension temperature gradient of the weld pool.
关键词
焊接/熔池表面张力/熔池温度/熔池振荡频率/电弧整体温度/焊剂
Key words
weld/surface tension of molten pool/weld pool temperature/weld pool oscillation frequency/overall arc temperature/flux
维普
万方数据