6061-T6铝合金纵-扭复合振动超声深滚加工试验研究

Experimental Study on Aluminum Alloy 6061-T6 by Ultrasonic Deep Rolling with Longitudinal-Torsional Vibration

基于纵-扭复合振动超声加工和超声深滚加工提出了纵-扭复合振动超声深滚加工工艺。采用普通深滚与纵-扭复合振动超声深滚2种加工方法对供应态6061-T6铝合金轴件进行表面强化处理,研究深滚工艺参数对加工表面质量的影响。结果表明:引入纵-扭复合振动后,超声深滚工艺参数对表面质量的影响规律与普通深滚不同,且在相同的工艺参数下,超声深滚所获得的表面粗糙度Ra值要小于普通深滚,最高降低约50%,而表面显微硬度和硬化率则有大幅提高,硬化率最高约为普通深滚的3倍,经纵-扭复合振动超声深滚处理后的表面更光滑,从而证明了纵-扭复合振动超声深滚加工工艺能更有效地实现6061-T6铝合金的强化处理。

Ultrasonic deep rolling with longitudinal-torsional vibration（UDR-LTV） was proposed based on ultrasonic machining with longitudinal-torsional vibration and ultrasonic deep rolling. Conventional deep rolling（CDR） and UDR-LTV were applied to deal with aluminum alloy 6061-T6 to study the effects of processing parameters on surface quality. The results indicate that the effects of the processing parameters of UDR-LTV on surface quality are different from that of CDR. With the same processing parameters, the surface roughness Ra obtained by UDR-LTV is smaller than that of CDR, which is reduced by almost 50% maximally, while the surface hardness and hardening rate obtained by UDR-LTV are increased remarkably, and the maximal hardening rate is about 3 times higher than that of CDR. The surface processed by UDR-LTV is smoother. It is proved that aluminum alloy 6061-T6 may be more effectively strengthening treated by UDR-LTV.