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铝、钢双金属复合材料低电阻铝端环电枢用于新型滑差电磁调速电机,可使其转速增加,效率提高,电机体积缩小,自重减轻,材料节省,达到高速、轻型、高效率。采用钢基表面热渗铝后浇注纯铝的方法使铝、钢熔合,工艺可靠,结合牢固,研究了渗铝温度和时间对铝、钢结合强度的影响,本试验中的主要强度指标已达到:σ_b～2.5Kg/mm~2,τ_(max)～6.6kg/mm~2。用光学显微镜,扫描电镜和电子探针观察和检验了熔合界面的微观结构。铝、钢熔合过程符合反应扩散的规律。反应扩散层为金属间化合物Fe_2Al_2。硅对铁和铝之问的扩散有阻碍作用,钢基表面电镀元素Cu、Cr 和Ni 对铝、钢的结合强度的影响不明显。
Aluminum, steel bimetallic composite Low resistance aluminum end ring armature for new slip electromagnetic speed motor can increase the speed, efficiency, motor size reduction, weight reduction, material saving, high speed, light, high efficiency . The method of pouring pure aluminum on the surface of steel base after hot aluminizing makes the aluminum and steel fused, the technology is reliable and the combination is firm. The influence of aluminizing temperature and time on the bonding strength of aluminum and steel was studied. The main strength indexes in this experiment have reached : σ_b ~ 2.5Kg / mm ~ 2, τ_ (max) ~ 6.6kg / mm ~ 2. The microstructure of the fusion interface was observed and examined by optical microscope, scanning electron microscope and electron probe. Aluminum, steel fusion process in line with the law of reaction and dispersion. The reaction diffusion layer is intermetallic compound Fe_2Al_2. Silicon on iron and aluminum asked the proliferation of impeding the role of steel-based surface electroplating elements Cu, Cr and Ni on the aluminum and steel bond strength is not obvious.