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正火终冷温度对U26Mn2Si2CrNiMo贝氏体奥氏体钢力学性能的影响 被引量:1
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作者 涂兴洋 杨昌贵 +3 位作者 史显波 刘毅 朱培培 严伟 《钢铁研究学报》 CAS CSCD 北大核心 2023年第9期1161-1173,共13页
通过力学性能测试及OM、SEM、EBSD、XRD显微组织分析,研究了正火终冷温度对U26Mn2Si2CrNiMo贝氏体奥氏体钢力学性能的影响。结果表明,当正火终冷温度为330℃时,其屈服强度达到1 246 MPa,抗拉强度达到1 335 MPa,伸长率为14.4%,室温冲击功... 通过力学性能测试及OM、SEM、EBSD、XRD显微组织分析,研究了正火终冷温度对U26Mn2Si2CrNiMo贝氏体奥氏体钢力学性能的影响。结果表明,当正火终冷温度为330℃时,其屈服强度达到1 246 MPa,抗拉强度达到1 335 MPa,伸长率为14.4%,室温冲击功为84 J,-40℃低温冲击功为38 J。随着正火终冷温度的降低,其屈服强度有所降低,但是抗拉强度增加,同时其伸长率和冲击功均逐渐降低。随正火终冷温度的降低,残余奥氏体体积分数逐渐降低,大角度晶界比例增加,残余奥氏体的取向稳定性和机械稳定性均降低,当温度降低至300℃时,残余奥氏体消失。同时低的正火终冷温度将增大贝氏体铁素体间的应变梯度,晶界失去了对裂纹扩展的阻碍作用,这些因素的协同作用导致综合力学性能的降低。 展开更多
关键词 U26Mn2Si2CrNiMo贝氏体奥氏 残余奥氏 贝氏体变体 分布
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Stress-strain behavior of multi-phase high performance structural steel 被引量:9
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作者 NIE WenJin WANG XueMin +2 位作者 WU ShengJie GUAN HaiLong SHANG ChengJia 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第7期1791-1796,共6页
A series of ferrite/bainite(F/B) multi-phase steels containing different volume fractions of ferrite were obtained.The effect of soft phase(ferrite) content on the work-hardening behavior of the steel was studied by t... A series of ferrite/bainite(F/B) multi-phase steels containing different volume fractions of ferrite were obtained.The effect of soft phase(ferrite) content on the work-hardening behavior of the steel was studied by the finite element simulation with V-BCC model and the modified Crussard-Jaoul(C-J) analysis.It is shown that the multi-phase steels have an excellent anti-deformation ability,such as higher stress ratio(R t1.5 /R t0.5),higher uniform elongation and lower yield to tensile strength ratio.For the F/B multi-phase steels,increasing the proportion of ferrite would help to increase the uniform elongation.However,introducing much more fraction of ferrite would not be helpful to improve the stress ratio of multi-phase steel.The ferrite plastic strain constrained by bainite would be beneficial to increasing the work hardening rate.The optimum proportion of ferrite will result both higher stress ratio and uniform elongation in multi-phase steel. 展开更多
关键词 multi-phase steel work hardening rate uniform elongation FERRITE BAINITE
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