脉冲电流对低碳微合金钢力学性能的影响  

EFFECT OF ELECTROPULSING ON MECHANICALPROPERTIES OF A LOW CARBONMICROALLOY STEEL

作　　者：周亦胄[1] 郭敬东[1] 王宝全[1] 何冠虎[1] 单以银[2] 

机构地区：[1]中国科学院金属研究所沈阳材料科学国家(联合)实验室 [2]中国科学院金属研究所

出　　处：《材料研究学报》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

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.

关 键 词：脉冲电流 低碳微合金钢 晶粒细化 力学性能 

分 类 号：TG142.12[一般工业技术—材料科学与工程]