The surface of austenitic stainless steel was remelted by a micro beam plasma arc.The micro structure was investigated by SEM;the hardness and the passivity ability were studied.

• 对奥氏体不锈钢表面进行了微束等离子重熔，用SEM观察和分析了重熔前后显微组织的变化，研究了硬度和耐蚀性的变化。