LIN Yijian YOU Yunlong ZHANG Xiaomin JING Chunyong YU Quanqin Shanghai Iron and Steel Research Institute
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Shanghai
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China LIN Yijian Shanghai Iron and Steel Research Institute
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Shanghai
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China
金属学报(英文版)
The solidification microstructure of Fe_(70)Cr_(18)Mo_2Si_1B_9 single-roll quenched ribbons with dif- ferent rotating speed of roller and under different atmosphere conditions was investigated. Apart from usual crystallization by homogeneous and heterogeneous nucleation,it was found that α-iron cohnnnar grains with strong preferred orientation formed beneath free surface and that spheres of α-iron single coastal with a size of several μm up to 20μm,which have rarely been reported,appeared inside the ribbons.There was experirnental evidence suggesting that clusters of metal atoms formed from fluctuation in early undercooled liquid might play a role as pre-existed nuclei and,in fact,control the formation of amorphous for this alloy.
关键词:
Fe_(70)Cr_(18)Mo_2Si_1B_9
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