Liu Nianfu. Analysis on Mechanical Property and Microstructure of Low Carbon Bainite Steel Q550 for Engineering Machinery Use[J]. IRON STEEL VANADIUM TITANIUM, 2012, 33(2): 77-81.
Citation:
Liu Nianfu. Analysis on Mechanical Property and Microstructure of Low Carbon Bainite Steel Q550 for Engineering Machinery Use[J]. IRON STEEL VANADIUM TITANIUM, 2012, 33(2): 77-81.
Liu Nianfu. Analysis on Mechanical Property and Microstructure of Low Carbon Bainite Steel Q550 for Engineering Machinery Use[J]. IRON STEEL VANADIUM TITANIUM, 2012, 33(2): 77-81.
Citation:
Liu Nianfu. Analysis on Mechanical Property and Microstructure of Low Carbon Bainite Steel Q550 for Engineering Machinery Use[J]. IRON STEEL VANADIUM TITANIUM, 2012, 33(2): 77-81.
The production of the high strength steel plate Q550 with thickness of 30 mm for engineering machinery use in Shaogang is introduced.Using low carbon and microalloyed elements such as Nb,V,Ti,Mo etc.plus TMCP and off-line tempering process,the plate was produced with mechanical properties satisfying the delivery requirements.In addition,the microstructure of the plate is examined by OM,SEM and the precipitated phase analysis by TEM and EDS.The results indicate that the tempered Q550 plate exhibited a microstructure of granular bainite,acicular ferrite and a small amount of polygonal ferrite with fine and uniform grain;The major precipitated phases were carbonitrides of Nb and Ti while V and Cr contribute little to the precipitation strengthening of Q550 plate.
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