工艺参数对高速电弧喷涂Al/1Cr13复合涂层组织结构的影响

用高速电弧喷涂制备Al/1Cr13复合涂层,采用3因素3水平正交试验法系统研究了电弧电流、电弧电压和喷涂距离对复合涂层的组织结构、孔隙率和氧含量的影响规律。采用扫描电镜对复合涂层的显微组织和孔隙率进行表征,采用氧氮含量分析仪测得涂层的氧含量。结果表明,在第9组喷涂参数即电弧电流为240A,电压为32V,喷涂距离为150mm的条件下制备的高速电弧喷涂Al/1Cr13复合涂层组织较致密,Al和1Cr13涂层的孔隙率最低分别为1.6%和2.2%。Al涂层氧含量显著低于1Cr13涂层,最低约为2%。

Effects of Spray Parameters on Microstructure of High Velocity Arc Sprayed Al/1Cr13 Composite Coatings

Al/1Cr13 composite coatings were fabricated by high velocity arc spray process.The effects of spray parameters(arc current,arc voltage and spray distance) on the microstructure,porosity and oxygen content of the coatings were investigated by an orthogonal experiment design method with 3 factors and 3 levels.The microstructure and porosity were measured by scanning electron microscope(SEM) and the oxygen content was examined by an oxygen-nitrogen analyzer.The results show that the densest Al/1Cr13 composite coatings are achieved under the 9th set spray parameters,arc current of 240 A,arc voltage of 32 V and spray distance of 150 mm.The minimum porosity of Al coating and 1Cr13 coating is 1.6% and 2.2%,respectively.The oxygen content of Al coating is significantly lower than that of 1Cr13 coating,and the minimum is about 2%.