WANG Yanan Anshan Institute of Iron and Steel Technology
,
Anshan
,
ChinaSONG Weixi University of Science and Technology Beijing
,
Beijing
,
China WANG Yanan
,
Laboratory of Metallography
,
Anshan Institute of Iron and Steel Technology
,
Anshan
,
Liaoning 114002
,
China
金属学报(英文版)
An observation under TEM was carried out of the hetero-particles and stripes inside of the vermicular graphite in cast iron specimens which were prepared by isothermally quenching in ice-salt-water.The hetero-particles and stripes,composed of almost pure Fe and a little Si, were found in the regions of the growth direction changing of the vermicular graphite.Many twins and dislocations were also observed to contribute to changing the growth direction and to providing the growth steps of the graphite respectively.
关键词:
vermicular graphite
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null
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ZHANG Xiaogang YAO Weixun Anshan Iron and Steel Institute
,
Anshan
,
114002
,
China.
材料科学技术（英文）
The influence of alloying elements and cooling conditions after rolling on the microstructures and mechanical properties of a series of medium carbon Si-Mn-Mo-V high-strength precision-formed rebars were investigated.It is found that steel with combined addition of Mo and V appears to be the most promising one than those containing V and Nb or containing V alone under the same pro- cessing conditions.From CCT curve of the steel and the cooling curve of the bar determined by sim- ulating the cooling rate in mill practice,the reason why 40Si2MnMoV bar has excellent combination of strength and ductility is clarified.
关键词:
high strength steel
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null
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