Research on X 42 and X 52 Steel Weldability by MAG-STT Procedure
Journal Title: RECENT - Year 2013, Vol 14, Issue 38
Abstract
This paper presents research into the use of MIG-MAG welding in STT version (surface tension transfer) in the welding of root layers. The aim for researching this aspect is to increase the range of applications of the STT variant of the process. The research consisted in welding two steels, X 42 and X 52, widely used in the construction of oil fluid carrier pipelines. Each material was root welded by a different procedure. Steel X 42 was manually metal-arc root welded and root X 52 was root welded by MAG - STT. Subsequently filling layers were manually metal-arc welded to both materials. Result assessment of the completed mechanical tests showed that the samples extracted from the MAG - STT root welded specimens displayed superior mechanical properties to those manually metal-arc roots welded. Root layers were welded by means of "INVERTEC STT II" equipment made by Lincoln, and the filling layers were deposited by means of covered electrode simple manual welding equipment. The study is useful in that it certifies the applicability with good results of the discussed process in pipeline welding and also sets the groundwork for research on the welding of fittings (valves) on pipelines.
Authors and Affiliations
Radu MAZILU
Keywords
Related Articles
- EP ID EP146422
- DOI -
- Views 59
- Downloads 0
Analysis of the Performance Criteria of Optoelectronic Systems
Analysing the results of the case study, I believe that the optimal choice optoelectronic systems is very important to determine and rank the performance criteria according to their contribution to fulfilling the mission...
Structural Non-Homogeneities Analysis of Zn-22 Wt. % Al Alloy by Nano-indentation
In the present paper the structure and properties of different phases/constituent of the eutectoid Zn-Al based alloys obtained by gravitational casting in brick moulds have been investigated. The microstructural analyses...
On The Opportunity to Manufacturing of Metallic Balls with Cavity by Centrifugal Casting
A centrifugal casting procedure and installation with three axes of rotation were patented at Transilvania University of Brasov. This can be deployed for casting hollow metal balls. The advanced multiple-criteria analysi...
Experimental Verification of a Software for Simulation of Centrifugal Casting Solidification
The software was developed to simulate the solidification of centrifugally castings with a rotationally symmetry. For the cast alloys that solidify in a temperature interval. The software uses a mathematical model with f...
DEFINING THE LARSON-MILER PARAMETER FOR A NEW ALLOY STEEL
This article shows how the Larson-Miler parameter could be defined through tests and then used to prognosticate the time to rupture for materials, working for a long time at a constant load and elevated temperatures. The...