冲击波处理45钢的微结构研究

The Microstructure of Shock Wave-Processed 45 Steel

1.
Laboratory for Shock Wave and Detonation Physics Research, Southwest Institute of Fluid Physics, Chengdu 610003, China;
2.
Department of Material Engineering, SouthwestUniversity of Traffic, Chengdu 610031, China

摘要: 利用二级轻气炮驱动弹丸的高速碰撞，向45钢材料试件中传入冲击波。利用显微硬度计、扫描电镜与透镜电镜，观察冲击波处理后45钢的显微硬度和细微观组织结构。观察分析结果表明，冲击波引起了45钢中珠光体内片状渗碳体的孪晶，并在铁素体内造成高密度的位错与位错胞。在铁素体中，除相外，还观察到另外一个相，这个相有待进一步辨别。
- 冲击波 /
- 微结构
Abstract: The projectile was driven to 2.34 km/s by using 20 mm diameter two-stage light gas gun and impacted with a target to deliver a shock wave into 45 steel sample material. The micro-hardness and micro-structure of the shock wave processed 45 steel were analyzed. The observed results indicate that twins of cemetite in pearlite and high density disloctions to selected zones show that there exist two phases in ferrite of shock wave-processed 45 steel; One is phase of ferrite, and the other remains to be identified latter.
- shock wave /
- microstructure