Abstract:Two types of low carbon weathering steel with different Mn content were produced in vacuum induction furnace. The microstructure characteristic and phase transformation regularity were analyzed by thermal simulator and metallographic microscope. Strength and toughness of experimental steel was characterized by room-temperature tensile test and impact test combining fracture analysis. The microstructure characteristic of weathering steel bearing low carbon and high manganese is ferrite and a small amount of pearlite with low cooling rate(<1 ℃·s-1), but duplex microstructure of bainite and ferrite is gained at a rather large range of cooling rate(1~10 ℃·s-1), moreover, the volume fraction of bainite is improved with cooling rate increasing. The dominant microstructure of two experimental steel rolling plates is equiaxed ferrite. Strength of weathering steel is increased remarkably when Mn content increases and plasticity and toughness are decreased somewhat. Excellent combination of strength and toughness is gained.
王博,王德永,刘承军,姜茂发. 锰对低碳耐候钢组织与强韧性的影响[J]. 中国冶金, 2007, 17(11): 41-41.
WANG Bo,WANG Deyong,LIU Chengjun,JIANG Maofa. Influence of Mn Content on Microstructure and Strength and Toughness of Low Carbon Weathering Steel. China Metallurgy, 2007, 17(11): 41-41.