摘要
低碳微合金钢连续冷却时都会产生多种类型的中温转变组织,低冷速下主要得到粒状贝氏体组织,高冷速下主要得到板条贝氏体组织.连续冷却时,在较高中温转变温度范围可形成针状铁素体,其转变受冷却速度和过冷温度影响.通过控冷可以在低碳微合金钢中得到贝氏体和针状铁素体多相组织,利用针状铁素体能改善高强度低碳微合金钢的综合力学性能.
Although the granular bainite and lath like bainitic ferrite are the main transformation phases after continuously cooling at low rate and fast rate of the low carbon microalloyed steel, the multi type transformation phases would appear at the different transformation temperature ranges. The acicular ferrite can be formed at higher intermediate temperature during continuously cooling. The nucleation and growth of the acicular ferrite are severely influenced by the cooling rate and undercooling temperature, and the fraction of the acicular ferrite can be controlled. The acicular ferrite and lath-like bainitic ferrite multi-phase microalloyed steel can be obtained by the control of cooling process. The acicular ferrite is benefit to improve the mechanical properties of low carbon microalloyed steel.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2005年第5期471-476,共6页
Acta Metallurgica Sinica
基金
国家重点基础研究发展规划项目1998061507国家高技术研究发展计划项目2003AA331020资助
关键词
多相组织
低碳微合金钢
针状铁素体
multi-phase
low carbon microalloyed steel
acicular ferrite
