钛基化学复合镀Ni-P-石墨晶化行为与性能研究Research on crystallization behavior and properties of Ni-P-Cg composite coating on titanium
范洪富;闫红娟;张翼;刘振雷;梁桂芳;
摘要(Abstract):
利用化学复合镀技术在钛基表面制备了含有石墨微粒的复合镀层。通过 SEM、XRD、EDS、显微硬度仪和磨损测试等方法对镀后组织性能进行分析,讨论石墨微粒的加入对镀层结构、晶化过程及镀层性能的影响,并与 Ni-P 合金镀层进行对比。结果表明:镀态下镀层是胞粒状堆积形式、属非晶结构,石墨嵌入镀层胞状颗粒中,表面呈现鲜花团集状态;石墨微粒的加入使复合镀层晶化温度升高。晶化完成周期缩短;含有层状石墨微粒的复合镀层大大地提高了钛基表面的耐磨性,热处理后镀层中出现大量的 TiC 硬质增强相,提高了镀层硬度。400℃热处理后硬度达到1239HV0.2,是钛基体的5倍,也高于 Ni-P 合金镀层。
关键词(KeyWords): 钛合金;化学复合镀;石墨;晶化;磨损
基金项目(Foundation): 国家自然科学基金(50574017)
作者(Author): 范洪富;闫红娟;张翼;刘振雷;梁桂芳;
Email:
DOI: 10.14024/j.cnki.1004-244x.2008.02.021
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