Effect of Cooling Rate on Microstructure and Mechanical Properties of Fe-1C-15Mn-10Al Low-density Steel
The influence of cooling rate on the microstructure and mechanical properties of the Fe-1C-15Mn-10Al low-density steel was studied.With the increase of cooling rate,the microstructures change from the three phases of austenite + δ- ferrite + κ- carbide to the two phases of austenite + δ-ferrite phases.The water cooling suppressed kcarbide precipitation at the γ / δ phase boundary,γ / γ grain boundaries,resulting in the greatly improved elongation.After water quenching from the solution treatment at 1030℃,the elongation is 59% and the product of strength and plasticity is 50GPa·%.The austenitic phase is allocated in larger strain than the ferritic phase,the deformation mechanism of austenite is the slip deformation.During the tensile deformation,micro cracks were observed at the γ/ δ phase boundaries of water-quenched specimen,at κ- carbide along γ/ δ phase boundary in the air-cooled specimen,and at γ / γ grain boundaries of the oil-quenched specimen.
low-density steel κ-carbide cooling rate mechanical properties
SHI Wen HU Qianqian LIU Rendong GUO Jinyu YAO Liang LI Lin
School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China Ansteel Group Co, Anshan 114021, Liaoning, China
国际会议
成都
英文
175-177
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）