摘要
对有淬火裂纹的 ４５钢试样进行脉冲电流处理，通过 ＳＥＭ观察处理前后试样的变化结果表明，在脉冲电流作用下．裂纹能够在无熔化的情况下出现愈合，且愈合是在极短时间内发生的.愈合过程不改变材料的原有结构．快速温升引起的瞬时热压应力可能是造成裂纹愈合的重要因素之一．
The specimens of 45 steel with the quenched crack were treated under electropulsing, SEM was employed to examine the change of specimens before and after the treatment. The results show that the crack can be healed under electropulsing without melting, and the healing of crack can be produced within very short time. The original microstructure of specimens is not changed during the healing. It is thought that the transient thermal compressive stress caused by high--rate heating is an important factor causing the healing of crack.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第1期43-45,共3页
Acta Metallurgica Sinica
基金
国家自然科学基金!59889101
关键词
脉冲电流
裂纹愈合
热压应力
淬火裂纹
碳钢
electropulsing, healing of crack, thermal compressive stress, quenched crack
