淬火工艺对BR1500HS超高强度硼钢板组织与性能的影响

Effect of quenching process on microstructure and mechanical properties of BR1500HS ultra-high strength boron steel plate

研究了淬火加热温度和保温时间对BR1500HS超高强度硼钢板的抗拉强度、硬度等力学性能和显微组织的影响。结果表明,随着淬火温度的升高,抗拉强度和硬度逐渐增加,当保温时间大于8 min时,淬火温度越高,组织越粗大,试验钢的抗拉强度和硬度降低。试验钢合理的淬火工艺为淬火温度900~950℃、保温时间4~8 min,在此工艺下淬火的BR1500HS超高强度硼钢板马氏体转变完全,具有较好的综合力学性能。

Effect of different austenitizing temperature and holding time on microstructure and mechanical properties of BR 1500 HS ultra-high strength boron steel was investigated .The results show that with the increase of austenitizing temperature , the tensile strength and hardness increase.The higher the temperature , the coarser the microstructure , and the tensile strength and hardness of the tested steel reduce when the holding time is longer than 8 min.The proper heat treatment process of the tested steel is to austenitize at 900-950 ℃ for 4-8 min. Martensitic transformation has completed after the proper treatment process , which leads to good mechanical properties of BR 1500 HS ultra-high strength boron steel plate .