本课题就是在铁基和镍基的等离子弧堆焊过程中引入纵向直流磁场，利用磁场的作用提高堆焊层的性能。
This paper is about the effect of introducing longitudinal magnetic field on plasma overlaying of Fe-based and Ni-based welding alloy.
本课题就是在钻基等离子弧堆焊过程中引入纵向直流磁场，利用磁场的作用提高堆焊层的性能。
This paper is about the effect of applied longitudinal magnetic field on Co-based plasma overlaying welding alloy.
经一定的腐蚀时间后，微弧氧化陶瓷膜的多孔层最终遭到破坏，而紧密层对防腐蚀起着至关重要的作用。
The outer porous layer is damaged after corrosion, while the inner dense layer played a key role to protect the coating from corrosion.
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