化学镀Ni-P合金与氮碳共渗复合强化的组织与结构研究

Study on the Structure of Electroless Plating Ni-P Alloy after Nitrocarburization

讨论了复合渗层的组织、相结构以及耐磨性。结果表明，Ni-P合金经氮碳共渗后基体中的铁和Ni－P合金层中的镍相互扩散，形成“钉扎效应”，显著提高镀层与基体间的结合力；此外，弯曲和折断试验表明，经氮碳共渗后的Ni－P合金层与基体金属的结合强度远大于经热处理后的Ni-P合金层；共渗后的镀层，其耐磨性优于经热处理后的镀层。

The structure and wear resistance of nitrocarburized coating are studied. The results show that Fe in the matrix and Ni in the Ni-P alloy disperse mutually to form 'nailing effect' after ni trocarburization. The joint force between the matrix and the Ni-P alloy is increased considerably. In ad dition, flexion and folding experiments display that joint strength between the matrix and Ni-P alloy af ter nitrocarburization is much greater than that of the Ni-P alloy after heat treatment. Wearing test shows that wear resistance of the Ni-P alloy after nitrocarburization has advantage over that of the Ni P alloy after heat treatment