Influence of GT AW welding process parameters on the microstructure and properties of 2A12 aluminum alloy plate weld seam
In view of the fact that the aluminum alloy web of an equipment is prone to cracks and wear after certain period of use,the non-melting tungsten electrode argon arc welding method was used to repair it,and the effects of different welding currents and argon gas flow on the microstructure and mechanical properties of 2A12 aluminum alloy surfacing weld were studied.The results show that when the argon flow rate is constant,the tensile strength increases first and then decreases with the increase of current,the tensile strength is the largest when the welding current is 60 A,and the tensile fracture position is on the base metal.When the welding current is constant,the tensile strength increases first and then de-creases with the increase of argon flow,and the tensile strength is the highest when the argon flow rate is 8.5 L/min.When the welding current is 60 A and the shielding gas(argon)flow rate is 8.5 L/min,the average tensile strength of the joint reaches a maximum of 127.09 MPa.The hardness distribution trend of welded joints under different parameters is almost the same,and all of them show an M-shape.
万方数据
维普
