The paper presents a research on the relationship between friction coefficient and friction pressure (6 MPa, 12 MPa, 16.5 MPa), rotational speed (1000 rpm, 1400 rpm, 2000 rpm) and surface temperature during traditional friction welding. Values of friction pressure force and friction torque were read on an oscilloscope connected to a piezoelectric sensor and temperature was measured with a thermovision camera on circumference of the welding surface and in the heat-affected zone. Friction was measured between two tubular elements OD 18 mm x WT 2 mm. It was found that the friction coefficient is dependent mostly on pressure force and temperature. Its value ranges from 0.12 to 0.83, with the top value at 16.5 MPa and 1400 rpm.
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机译：本文研究了传统摩擦焊接过程中摩擦系数与摩擦压力（6 MPa，12 MPa，16.5 MPa），转速（1000 rpm，1400 rpm，2000 rpm）和表面温度之间的关系。在连接到压电传感器的示波器上读取摩擦压力和摩擦扭矩的值，并使用热像仪在焊接表面的圆周上和热影响区测量温度。测量两个外径为18 mm x WT 2 mm的管状元件之间的摩擦力。发现摩擦系数主要取决于压力和温度。其值的范围是0.12至0.83，最高值为16.5 MPa和1400 rpm。
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