Continuous Casting 

Abstract: Surface tension of mold flux was one of the important parameters being used to research the reaction on the interface of steel and slag.Its magnitude directly effected separation of steel and slag and the function of absorbing inclusions of molten slag.In this paper surface tension of mold flux was measured by the method of suspension link.The results showed that surface tension of mold flux decreased with basicity falling.On the contrary,increasing basicity made surface tension larger.Al_2O_3 was non-surface active substance,which could increase surface tension.Na 2O and F-were surface active substances,which could reduce surface tension of molten slag.

Abstract: To investigate the solidification shrinkage behavior of ultra-thick slab in the mould with different chamfering of the narrow face copper, the finite element models of two-dimensional transient thermo-mechanical coupled were set up by means of ABAQUS software. The temperature and stress distribution of slabs were calculated through the user subroutine. The effect of mould fluxes and air gap on heat transfer was taken into account comprehensively in the models. The numerical results show that: when the chamfering of mould narrow face copper is too large or too small, it is disadvantageous for the uniform distribution of the slab temperature. For the slab of 420 mm in thickness, the fillet radius of 24 mm makes the slab surface temperature distribution most uniform and the maximum plane principal stress distribution more reasonable, so that the corner transverse cracks will be greatly reduced.

Abstract: The high temperature mechanical properties of steels have been describedThe influ- ence of thermal history,composition,strain rate,cooling rate,grian size,precipitation and dynamic recrystallisation on high temperature mechanical properties of steels have been introducedThe rela- tionship between these factors have been analysedResults showed that it was the essential reason of high-temperature brittleness that grain boundary strength decreased and grain boundary sliding oc- curred when deformation happened on high temperature

Abstract: Low and stable superheat casting is effective to improve strand quality and stabilize operation in continuous casting.In continuous casting process,heat losses in tundish is existed,outside heat sources are required to compensate heat losses.Tundish channel type induction heating technology are summarized,which include equipment construction,heating principle,flow characteristics,remove mechanism of inclusions and use effects etc.