The Paton Welding Journal, 2012, №10



2012 №10 (03)

2012 №10 (05)

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The Paton Welding Journal, 2012, #10, 20-24 pages  

TO THE MECHANISM OF DIFFUSION OF CHROMIUM AND MOLYBDENUM IN THE METAL OF WELDED JOINTS OF STEAM PIPELINES

V.V. Dmitrik¹ and T.A. Syrenko²

¹Kharkov Polytechnic Institute, Kharkov, Ukraine
²Kharkov Engineering College, Kharkov, Ukraine
 
 
Abstract
The concepts of the mechanism of diffusion of chromium and molybdenum in the metal of welded joints of steam pipelines from heat-resistant pearlite steels in long-term operation were widened. It is shown that diffusion movement of atoms of chromium and molybdenum occurs by vacancy and dumbbell mechanisms.
 
Keywords: arc welding, heat-resistant pearlite steels, welded joints of steam pipelines, solid-phase reactions, activation energy, adhesion forces, diffusion movement
 
 
Received:                17.07.12
Published:               28.10.12
 
 
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