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在我国,粉末等离子堆焊工艺在阀门工业的阀面保护和冶金工业的搅拌器、轧钢零件等方面已经获得成功的应用。但是,目前粉末等离子堆焊还仅仅适用于金属零部件的外表面,或大直径内孔表面的修复和加工。而对窄间距、小直径内孔或曲面工作面,由于现有粉末等离子堆焊枪结构复杂,且外形尺寸大,焊枪伸不到工件内部而无法施焊。为了满足小直径内孔件和窄间距耐磨工作面能采用等离子粉末堆焊工艺的需要,我们从1982年初开始设计并研制了能堆焊内孔直径为85mm的小
In our country, the powder plasma surfacing process has been successfully applied in valve industry’s valve surface protection and metallurgy industry agitators and steel rolling parts. However, the current powder plasma surfacing is only applicable to the metal parts of the outer surface, or large diameter bore surface repair and processing. For narrow pitch, small diameter bore or curved face, due to the complexity of the existing powder plasma torch welding gun and large size, the torch can not reach the inside of the workpiece and can not be welded. In order to meet the needs of small diameter bore and narrow spacing wear-resistant work surface can be used plasma powder surfacing process, we have designed and developed from the beginning of 1982 can surfacing bore diameter of 85mm small