【摘要】 利用HX-1型显微硬度计、光学显微镜(OM)、扫描电镜(SEM)等分析测试手段,研究Mn-B系空冷贝氏体钢爆破圆筒破片中绝热剪切带热处理后的显微硬度和微观形貌特征.结果表明:热处理导致绝热剪切带中储存能量释放使绝热剪切带硬度下降,800℃热处理后绝热剪切带硬度最低,300℃热处理后绝热剪切带白亮特征减弱,800℃热处理后绝热剪切带白亮特征完全消失,与基体融为一体.更多还原

【Abstract】 The hardness and microstructure characteristics of adiabatic shear bands in Mn-B system air-cooling bainitic steel exploded cylinder fragment after heat treatment were studied applying Vickers sclerometer,OM and SEM.The results showed that the hardness of the adiabatic shear bands decreased because the energy stored in the adiabatic shear bands were released after heat treatment and the hardness of the adiabatic shear bands went to a minimum after 800℃ heat treatment.The bright characteristics of the adiabatic shear bands became dark after 300℃ heat treatment and the bright characteristics of the adiabatic shear bands completely disappeared after 800℃ heat treatment and blended with the body.更多还原