黄铜渗铝的研究

Study of Aluminising on Brass

摘要: 采用粉末渗镀法,研究了黄铜渗铝工艺。获得有效渗铝的工艺条件是:渗镀温度600℃,渗镀时间3h,渗剂组成是Al粉40%、NH₄Cl 2%和Al₂O₃粉58%。渗铝后的黄铜耐蚀性提高1.8倍,硬度增加25.6%,渗层厚度为50μm。通过X射线衍射分析等得出,黄铜渗铝层的结构由表面至基体是Cu_0.6108Al_0.3892→γ₂-Cu₉Al₄→α-CuZn(含Al)→α-CuZn。

Abstract: The technique of aluminising on brass by powder plating method has been studied.The optimum technological conditions obtained were:temperature 600℃,time 3h and the constitute of coating agent aluminium powder 40%,NH₄Cl 2% and alumina powder 58%.After aluminising,The corrosion resistance of brass increases 1.8 times,the hardness increases 25.6% and the coating thickness is 50μm.The structure of coating layer of aluminium on brass from surface to interior obtained by X-ray diffraction analysis was:Cu_0.6108Al_0.3892→γ₂-Cu₉Al₄→α-CuZn(Al)→α-CuZn.