含B钒微合金钢的连续冷却相变行为
发布时间：2018-10-15 12:17
【摘要】：为开发一种新的低成本高性能含B钒微合金钢和建立其TMCP生产工艺,用MMS-200热力模拟试验机研究了实验钢在连续冷却条件下的相变规律,绘制出实验钢的静态CCT曲线和动态CCT曲线.结果表明:微量的B提高了钒微合金钢过冷奥氏体稳定性,促进了针状铁素体形成,在比较宽的冷却速度范围内能得到贝氏体组织;未变形钢相比于变形钢,在更低的冷却速度甚至0.5℃/s的冷却速度下能得到大部分的贝氏体组织,但两者在5℃/s以上的冷却速度下都得到全部贝氏体组织;变形降低了奥氏体稳定性,促进铁素体转变,含硼钢铁素体转变存在的冷速升高到2℃/s,不含硼钢的其冷速升高到15℃/s;钒微合金钢中B有利于获得高强度的贝氏体组织,冷速5℃/s以上时相变后含硼钢的硬度都高于变形及未变形不含硼钢的硬度.
[Abstract]:In order to develop a new low cost and high performance B vanadium microalloyed steel and establish its TMCP production process, the phase transformation law of experimental steel under continuous cooling condition was studied by MMS-200 thermal simulation test machine. The static CCT curves and dynamic CCT curves of experimental steel were drawn. The results show that the microelement B improves the austenitic stability of vanadium microalloyed steel and promotes the formation of acicular ferrite, and the bainite structure can be obtained in a wide range of cooling rate, and the undeformed steel is compared with the deformed steel. Most of the bainite structure can be obtained at lower cooling rate or even 0.5 鈩，
本文编号：2272531
[Abstract]:In order to develop a new low cost and high performance B vanadium microalloyed steel and establish its TMCP production process, the phase transformation law of experimental steel under continuous cooling condition was studied by MMS-200 thermal simulation test machine. The static CCT curves and dynamic CCT curves of experimental steel were drawn. The results show that the microelement B improves the austenitic stability of vanadium microalloyed steel and promotes the formation of acicular ferrite, and the bainite structure can be obtained in a wide range of cooling rate, and the undeformed steel is compared with the deformed steel. Most of the bainite structure can be obtained at lower cooling rate or even 0.5 鈩，
本文编号：2272531
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