The inertia friction welding technology to connect Ti52/304 stainless steel/titanium alloy, explore under two kinds of welding process parameters, by means of optical microscope, scanning electron microscopy (sem) and energy spectrum analyzer after butt welding joint organization and interface intermetallic compound were characterized and analyzed by means of microhardness meter and electronic tensile testing machine for mechanical properties test and verify. The results show that dynamic recrystallization occurs on both sides of the weld near the interface, resulting in a high microhardness value near the weld zone, and the microhardness value decreases continuously as the distance from the weld site is increased. The peak microhardness value of Ti52 alloy far from the weld site is at 450 HV0.5, which is due to the microstructure fragmentation and refinement under the action of thermodynamic coupling. At high heat input and low welding pressure, the brittle phase Ti/FeTi with thickness of 5 μm and inhomogeneity is formed at the welding interface, which is not good for the bonding of titanium steel and reduces the joint properties, the tensile strength is 159 MPa. Under low heat input and high welding pressure, the cr-rich intermetallic compound Ti5Fe17Cr5 with uniform thickness of 2 μm is formed at the center of the welding interface, which is beneficial to the joint interface bonding and improves the joint properties, the tensile strength is 350 MPa.
titanium/steel material connectioninertia friction weldinginterface organizationintermetallic compound
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