کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1661077 1517694 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Cutting performance of CrN-based coatings tool deposited by hybrid coating method for micro drilling applications
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Cutting performance of CrN-based coatings tool deposited by hybrid coating method for micro drilling applications
چکیده انگلیسی

This paper describes the results of application of CrN based coatings to micro drilling operation for deep and small boreholes machining. Four different CrN, Cr–Al–N, Cr–Si–N, and Cr–Al–Si–N coatings were successfully deposited on WC–Co substrates by a hybrid coating system. Their microstructure and mechanical and tribological properties were systematically investigated. The hardness values of the Cr–Si–N (~ 35 Gpa) and the Cr–Al–Si–N (~ 55 Gpa) coatings were significantly increased compared with those of CrN (~ 23 GPa) and Cr–Al–N (~ 25 GPa) coatings. Besides, the average friction coefficients of the Cr–Si–N (~ 0.30) and the Cr–Al–Si–N (~ 0.57) coatings with Si content of 9 at.% were largely decreased compared with those of CrN (~ 0.50) and Cr–Al–N (~ 0.84) coatings. And then, high-speed through-hole drilling tests were performed on circuit board workpiece to investigate the machining performance of coated micro drills. The experimental results show that the Cr–Al–Si(8.7 at.%)–N has excellent microstructure, microhardness, and tribological properties and represents the optimal coatings for micro drilling applications.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 202, Issues 22–23, 30 August 2008, Pages 5629–5632
نویسندگان
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