Effect of Forced Convection on Grain Refinement of S32205 Duplex Stainless Steel
The effects of forced convection on grain refinement of S32205 duplex stainless steel (DSS)were investigated using a continuous casting simulation setup.The sample,which was called slab simulating unit here,was solidified in the continuous casting simulation setup,whose temperature was controlled according to the cooling curve of a DSS slab center,with the bottom cooled by rtmning water to simulate the solidification process of slab.Forced convection was generated by square-wave mechanical stirring.The CET (columnar to equiaxed transition) was gradually promoted by forced convection when the rotation of the crucible speeded up,the microstructure was refined significantly.The average columnar zone length was reduced from 8.2 cm to 4.8 cm,the equiaxed grain average size decreased from 9.5 mm to 1.7 mm,and the microstructure was refined from Widm(a)nstatten plates to island-shaped pieces.
Duplex stainless steel Forced convection CET Grain refinement Equiaxed grains
XiangRu Chen HongGang Zhong ChangJiang Song QiJie Zhai
Shanghai Key Laboratory of Modern Metallurgy & Materials Processing, Shanghai University,Shanghai, China, 200072
国际会议
北京
英文
626-630
2012-12-16（万方平台首次上网日期，不代表论文的发表时间）