کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
617385 1454986 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modes of tool deterioration during milling of 718Plus superalloy using cemented tungsten carbide tools
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Modes of tool deterioration during milling of 718Plus superalloy using cemented tungsten carbide tools
چکیده انگلیسی

Understanding the detailed progression of cutting tool deterioration is important in order to improve the milling of Ni-based superalloys. Therefore, a series of documented experiments have been conducted on alloy 718Plus using cemented carbide (WC–Co) tools. It has been observed that the commonly recognised build up layer in the initial stage does not significantly affect the tool deterioration process. Instead, from the beginning of milling, cutting forces/stresses could cause small chipping locally in the initially sharp cutting edge. Fracturing locally with cracks propagating outside the cutting edge along the flank face in the subsurface region could also take place and was consistent with the direction of the cutting force. There was an initial period of time during which a number of microcracks had initiated in and near the cutting edge on the rake face side. These cracks soon propagated resulting in extensively fracturing and blunting of the tool. Coating of the tools had provided little protection as in the cutting edge area the coating had broken away soon after milling started. The major tool failure mode was Co binder material having heavily deformed to fracture, separating the WC grains. Loss of strength in binder material at cutting temperatures is discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Wear - Volume 316, Issues 1–2, 15 August 2014, Pages 92–100
نویسندگان
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