渗硼并两步处理硬质合金微晶金刚石涂层工具研究  

Boronizing and Two-step Method for Adhesion Enhancement of CVD Diamond Coatings on Cemented Carbide Substrates

作　　者：苗晋琦[1] 王成彪[1] 张鬲君[2] 吕建国[1] 唐伟忠[3] 吕反修[3] 

机构地区：[1]中国地质大学,北京100082 [2]中原工学院,郑州450007 [3]北京科技大学,北京100083

出　　处：《人工晶体学报》2006年第3期518-524,共7页Journal of Synthetic Crystals

摘　　要：研究了固体粉末渗硼并碱酸两步处理预处理硬质合金基体的表面组织、形貌、粗糙度,并在处理过的硬质合金基体上,用强电流直流伸展电弧等离子体CVD法沉积微晶金刚石薄膜涂层。进一步的涂层质量表征,附着力测试及切削实验研究结果表明,这种涂层质量高、附着力好(压痕测试临界载荷大于1500N)。金刚石涂层工具的切削加工性能明显优于无涂层硬质合金工具。在加工ZA lS i12合金时,微晶金刚石涂层车刀片、铣刀片的切削寿命是无涂层车刀片、铣刀片切削寿命的32倍和26倍。The surface structure, morphology and roughness of boronizing and two-step method on cemented carbide substrates were investigated. Diamond films were deposited by means of the high current extended DC arc plasma CVD equipment. The diamond coatings quality was demarcated and its adhesion was tested further. The results show that the quality of the diamond coatings is high and its adhesion is very good. The cutting performance of the diamond coating tools is much higher than that of the uncoating diamond tools obviously. And the cutting life of the coated turning cutter and milling cutter with single layer diamond films is about 32 times and 26 times longer than that of the uncoated tools.

关 键 词：硬质合金 两步法 表面预处理 金刚石涂层 附着力 

分 类 号：TQ164[化学工程—高温制品工业]