In order to optimize the friction welding parameters of X100 pipeline steel

the tensile strength and hardness of the friction welded joint are taken as the evaluation indexes

through the orthogonal test

the influence of the welding parameters such as the friction speed

friction pressure

upsetting pressure and axial shortening on the performance of the welded joint are studied

and the welding parameters for high quality welded joints are obtained. The results show that The influence of each welding parameter on the performance of the X100 friction welded joint in descending order is:friction pressure

friction speed

upsetting pressure and axial shortening. Taking the strength and hardness of the joint as the index

the optimum welding parameters is: friction speed of 1 000 r/min

friction pressure of 170 MPa

upset pressure of 255 MPa

axial shortening of 7 mm. Through the verification test of the optimal welding parameters

the tensile properties obtained exceed the tensile test results before optimization

and the consistency between the test results and the range analysis results is verified.