کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1582692 1514876 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure characteristics of Ni-based WC composite coatings by laser induction hybrid rapid cladding
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Microstructure characteristics of Ni-based WC composite coatings by laser induction hybrid rapid cladding
چکیده انگلیسی

To avoid low cladding rate and cracks of cladding layer, laser induction hybrid rapid cladding (LIHRC) has been put forward in the paper. The microstructure characteristics of Ni-based WC composite coatings at the different laser scanning speed were investigated. For low laser scanning speed, the growth of γ-nickel was characterized by coarse columnar dendrites and eutectics, blocky W2C + Fe3W3C carbides, and bar-like (W, Cr, Ni)23C6 carbides were formed. With increasing laser scanning speed, the growth of γ-nickel presented the fine dendrites and eutectics, the only blocky mixed carbides were precipitated and identified as W2C + FeW3C + W6C2.54 carbides. With further increasing laser scanning speed, the growth of γ-nickel was characterized by cellular crystals and eutectics, the only blocky carbides were identified as W2C + W6C2.54. Moreover, experimental results showed that the efficiency of LIHRC was increased much four times higher than that of laser cladding without preheating, ceramic–metal composite coatings detected were free of cracks and had a good metallurgical bonding with substrate.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 480, Issues 1–2, 15 May 2008, Pages 564–572
نویسندگان
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