Study On Hot Forgeability Of Bimaterial Mig Weld Cladded Worpiece

Multi-material workpieces could satisfy the complex functionalrequirements as well as attain a compromise between performances andmanufacturing costs. One way to fabricate multi-material workpieces is todeposit another material which could improve the comprehensiveperformances and extend the service life of the workpiece by suitable joiningtechnique. Weld cladding is a commonly used surface coating technologywith high efficiency, thick surface coating, a wide range of applications andlow cost. The traditional fabrication lay-out of multi-material workpiecesincludes preform manufacturing, forming process, cladding process andfinishing process. The form of the workpiece becomes complex after theforming process, causing the problem of low efficiency and bad qualitycontrol of the following cladding process. The presented work has put thecladding process before the forming process, cladding a simple preform andobtaining a complex workpiece by forming process. The hot forgeability ofweld cladded workpiece is studied experimentally and numerically. Thespecimen is a cylindrical low carbon (C15) billet cladded by austeniticstainless steel (SS316L) by MIG welding process. The specimens are upsetat different temperatures (750,900and1050) with different kinds ofdies (striated, dry flat and lubricated flat) which represent different frictionconditions at the die/specimen surface. Cracking and material distributionare observed. With the help of experiment，slab model and finite elementmodel, the forgeability of the weld cladded specimen is studied.