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Metal inert gas welding-brazing technological development and experimental results

D. DANA1, I. G. SANDU1, P. VIZUREANU1,* , I. SANDU2,3

Affiliation

  1. Technical University Gheorghe Asachi from Iasi, Faculty of Materials Science and Engineering, Iasi, Romania, Blvd. D. Mangeron 61, 700050 Iasi, Romania
  2. Alexandru Ioan Cuza University of Iasi, Arheoinvest Platform, Laboratory of Scientific Investigation, Blvd. Carol I, no. 22, Corp G Demisol, 700506 Iasi, Romania
  3. Romanian Inventors Forum, Str. Sf. Petru Movila, 3, Bl. L11, Sc. A, Et.III, Ap. 3, 700089 Iasi, Romania

Abstract

In the welding process of metals, two materials are joined by a filler material with low melting point (below 450°C), also below the melting point of materials to be joined. The braze-welding filler material has a melting point over 450°C to 1000°C. Filler material is distributed between two surfaces of the joint by capillary action close, the blended material is applied on an electrode specially manufactured and intended operation. This paper proposes an analyze of the techniques, feathers, technology requirements, process gaseous, materials (standard data base) and conditions used in braze-welding processes. The secret of solder bonding and weld seems to be the opening that supposes to be small. Two methods are proposed and analyzed for welding process based on braze welding. Scanning electrons microscope and EDAX detector were used to characterize the weld line by micro-structural and chemical point of view. The microstructure analysis concentrated on the weld line area presents reduced dimensional variation and a modification of the materials surface smoothness. Chemical elements distribution exhibits an increase of carbon percentage on the weld line and a decrease of iron in the same time and area..

Keywords

Braze welding, Laser, Narrow joint, Filler metallic material.

Submitted at: Aug. 19, 2013
Accepted at: Sept. 18, 2013

Citation

D. DANA, I. G. SANDU, P. VIZUREANU, I. SANDU, Metal inert gas welding-brazing technological development and experimental results, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 9-10, pp. 1153-1161 (2013)