At impact energy of 2.7 J, it is mainly spalling of extruded hardened edge for LCHA, primarily massive fatigue spalling and heavy corrosive wear for HMN and principally massive brittle spalling and heavier corrosive wear for MCA.

• 2 7J冲击功下,低碳高合金钢主要为挤出硬化棱的剥落,高锰钢主要为块状疲劳剥落和较严重的腐蚀磨损,中碳合金钢主要为块状脆性剥落及严重的腐蚀磨损;