Study About The High-temperature Creep Property And Bulging In The Countinous Slab

Continuous casting has been developing rapidly and applying widely in steel industryall over the world for its advantages, such as high productivity, heat effectiveness and soon. However, improper cooling parameters and bulging deformation caused by theferro-static pressure may influence the quality of slab, even interrupt the continuousprocess. The creep deformation has a great influence on bulging deformation incontinuous casting. Therefore, it’s very important to study the high-temperature creepproperty and bulging in the cast slab.First this paper introduces the experiments of high-temperature creep for stainlesssteel0Cr18Ni9are conducted by using Gleeble-3500thermal-force simulation machine.The result indicates that temperature and force have a great impact on creep strain rate. Bythis result, the creep equation at high temperature had been simulated, and the relationbetween stress and strain was constructed.The Finite element software Marc is used to simulate the solidification process ofcontinuous casting. The temperature field of the slab in mould and secondary cooling zonewas got at any position. The thickness of the solid shell and the position of thesolidification terminal were investigated and analyzed. Based on the solidificationsimulation, using elastic-plastic creep model, the bulging deformation was analyzed bytaking the creep equation into CRPLAW the subroutine of Marc. By means of consideringcreep law or not, the influence of creep deformation on bulging deformation, equivalentstress, and creep strain were analyzed. At last, the relation between creep deformation androll spacing was analyzed, it provide the inference.