کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
658696 1458089 2012 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Determination of equilibrium wire-feed-speeds for stable gas metal arc welding
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Determination of equilibrium wire-feed-speeds for stable gas metal arc welding
چکیده انگلیسی

In gas metal arc welding (GMAW), a consumable electrode wire is fed normally at a pre-determined constant speed in order to achieve a stable welding process for given welding conditions. In this article, a comprehensive mathematical model for GMAW was employed to study the interplay among electrode melting; the formation, detachment, and transfer of droplets; and the plasma arc under various welding conditions. It is found that a stable GMAW process can be obtained through a balance between the wire-feed-speed (WFS) and the dynamic electrode melting rate due to the transient behavior of plasma arc. Otherwise, an unstable welding process including electrode burned-back or stick-onto the weld pool could occur. The model-predicted equilibrium WFS varying with welding current and feeding-wire diameter is in good agreement with the published empirical results obtained through a trial-and-error procedure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 55, Issues 23–24, November 2012, Pages 6651–6664
نویسندگان
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