SIMULATION AND EXPERIMENT STUDY OF BENDING PROCESS OF LARGE MARINE CRANKTHROW
SUN Mingyue; LI Dianzhong; LI Yiyi; LING Jin; SHEN Caiping
Institute of Metal Research; The Chinese Academy of Sciences; Shenyang 110016
Cite this article:
SUN Mingyue; LI Dianzhong; LI Yiyi; LING Jin; SHEN Caiping. SIMULATION AND EXPERIMENT STUDY OF BENDING PROCESS OF LARGE MARINE CRANKTHROW. Acta Metall Sin, 2005, 41(12): 1261-1266 .
Abstract A constitutive equation was established based on stress-strain curves
of S34MnV at different strain rates and high temperatures. The coupling
of thermal-mechanical process in bending large marine crankthrow was
simulated by using ABAQUS code. From the simulation results, the
strain-stress field and temperature field in the forging process were
obtained. In order to analyze the mechanism of metal flow of crankthrow,
the evolutions of the hydrostatic pressure and the surface
tensile/compressive stress of typical positions on the crankthrow were
investigated. The simulated defect positions, such as the “slim waist”,
crack and“horn mouth”etc, as well as the final shape and size of the
crankthrow agree well with the experimental ones. Furthermore, an
improved suggestion was given, which could be helpful to optimize the forging parameters.
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