Effect of Welding Thermal Cycle on the Microstructure and Mechanical Properties in Multi-Pass Submerged-Arc Welding

Zhong Yi Chen; Yong Lin Ma; Shu Qing Xing

doi:10.4028/www.scientific.net/AMR.314-316.1163

Paper Titles

Numerical Analysis of Stress Field for Simulating Pressure Vessel Nozzles
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Experimental Research on Compound and Efficient Powerful Milling Process of Blisk
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Constitutive Equation for V–5Cr–5Ti at High Temperatures Measured Using the SHPB Technique
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Influence of δ Phase Content on Hot Deformation Behavior of Ni-Based Superalloy IN718
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Effect of Welding Thermal Cycle on the Microstructure and Mechanical Properties in Multi-Pass Submerged-Arc Welding
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Experimental Study on Ball End Mill in Glass Machining at High Speed
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Simulation of the High-Speed Milling Temperature of Titanium Alloy Ti - 6Al - 4V
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Analysis and Experimental Research on Chemical Mechanical Polishing Flow Field
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Microstructure and Mechanical Property of GH4169 Joints by Vacuum Diffusion Bonding
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 314-316Effect of Welding Thermal Cycle on the...

Effect of Welding Thermal Cycle on the Microstructure and Mechanical Properties in Multi-Pass Submerged-Arc Welding

Abstract:

To research effect of welding thermal cycle on the microstructure and mechanical properties of welded joint, two pieces of 60mm thick plates were welded together using automatic submerged-arc welding (SAW) method with suitable welding parameters. After 17 passes welding, the microstructures and phases of the welded joint was carefully observed and analyzed by using a Carl Zeiss optical microscope in different zones of welded joint, and the surface micro-hardness of the welded joint was measured systematically by using microscopic-hardness tester Lycra. Afterwards, the mechanical properties of the weld metals were measured through stretching. Through a series of measurements and observations, the welding experiment results indicate that effect of welding thermal cycle on the microstructure and mechanical properties of welding joint is great, the grains of the bottom of the weld metal are certainty smaller and more uniform, and the bottom of the weld metal have more excellent mechanical properties.