摘要
研究了脉冲电流对一种低碳微合金钢的组织和力学性能的影响.结果表明,脉冲电流处理可以使该钢的晶粒显著细化,从而使其力学性能提高.细化后的组织热稳定性好,在 400 ℃长时间保温不会出现晶粒长大.脉冲电流加热速度快,作用时间短和降低相变势垒的作用是晶粒细化的原因.
Electropulsing was empolyed to treat a low carbon microalloy steel. The results show that the microstructure of the steel can be refined by the treatment and the mechanical properties can be improved. The refined microstructure has high thermo-stability, after heating at 400°C for 20h, no structural coarsening was observed. It is suggested that high heating rate, change of thermodynamic barrier during phase transformation and very short treating time are the main factors for the grain refinement.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2002年第3期243-246,共4页
Chinese Journal of Materials Research
基金
国家自然科学基金59931020
国家重大基础研究G1999065009资助项目
关键词
脉冲电流
低碳微合金钢
晶粒细化
力学性能
Mechanical properties
Microstructure
Phase transitions
Thermodynamic stability
