电弧喷涂工艺参数对Zn-Al伪合金制模涂层性能的影响  

Effect of Spraying Parameters on the Properties of Zn-Al Pseudo Alloy Coating Shell for Arc-Spraying Die

作　　者：田峰[1] 李秉忠[1] 张海成[1] 

机构地区：[1]武汉材料保护研究所,湖北武汉430030

出　　处：《材料保护》2006年第9期34-36,共3页Materials Protection

摘　　要：为了提高电弧喷涂模具的复制精度和使用寿命,研究了喷涂工艺参数变化对电弧喷涂制模中Zn-Al伪合金金属壳的硬度和致密性的影响。试验采用Zn丝作阴极,Al丝作阳极进行电弧喷涂。在固定喷枪移动速度和喷涂角度为90°的条件下,分析得出,送丝速度和喷涂距离对伪合金涂层硬度、孔隙率影响较小,而电弧电压和压缩空气压力对伪合金涂层硬度、孔隙率影响较大,并通过正交分析法得出了电弧喷涂制备Zn-Al伪合金涂层的最佳工艺参数:电弧电压30V,送丝速度5m/min,喷涂距离200mm,压缩空气压力0.5MPa。最后分析了不同工艺参数下涂层的金相组织。The effect of spraying parameters on the rigidity and compactness of Zn-Al pseudo alloy coating shell of an arc-spraying die was investigated, aiming at improving the precision and service life of the arc-spraying die. Thus the Zn-Al pseudo alloy coating was prepared for the die by means of arc spraying, using Al filament as anode and Zn filament as cathode. The effects of the spraying parameters on the rigidity and compactness of the Zn-Al pseudo alloy coating were examined, and the optimized spraying parameters were determined making use of orthogonal test. The metallographic structures of the Zn-Al pseudo alloy coatings prepared at various spraying conditions were analyzed as well. It was found that, at a fixed moving rate of the spraying gun and a fixed spraying angle of 90°, the feeding rate and spraying distance had little to do with the rigidity and compactness of the Zn-Al pseudo alloy coating, but the spraying voltage and air pressure had significant effects on the rigidity and porosity of the Zn-Al pseudo alloy coating. The optimized spraying conditions for the Zn-Al pseudo alloy coating were determined to be arc voltage 30 V, feeding rate 5 m/min , spraying distance 200 mm, and air pressure 0.5 MPa.

关 键 词：电弧喷涂制模 Zn—Al伪合金 硬度 孔隙率 

分 类 号：TG174.442[金属学及工艺—金属表面处理]