Hostname: page-component-78c5997874-mlc7c Total loading time: 0 Render date: 2024-11-16T15:31:12.816Z Has data issue: false hasContentIssue false
  • English
  • Français

MECHANICAL AND MICROSTRUCTURAL EFFECTS ON MEDIUM CARBON STEEL WELD JOINTS WHEN A GMAW PROCESS IS USED TO REPAIR STRUCTURAL COMPONENTS USED IN THE MANUFACTURING OF HEAVY MINING EQUIPMENT

Published online by Cambridge University Press:  05 March 2012

Eduardo Valenzuela  and
Víctor López
Eduardo Valenzuela
Affiliation:
Equipos de Acuña S.A. de C.V. Carretera Presa a la Amistad Km. 8.5 .Parque Industrial Modelo, C.P. 26220, Cd. Acuña, Coahuila, México, (877) 7730606 Ext. 5470, Fax (877) 7731131, Corporación Mexicana de Investigación en Materiales S.A. de C.V., Ciencia y Tecnología #790. Fracc. Saltillo 400, C.P. 25290, Saltillo, Coahuila, México, (844) 4113200 Ext. 1215, Fax (844) 4113210, [email protected]
Víctor López
Affiliation:
Corporación Mexicana de Investigación en Materiales S.A. de C.V., Ciencia y Tecnología #790. Fracc. Saltillo 400, C.P. 25290, Saltillo, Coahuila, México, (844) 4113200 Ext. 1215, Fax (844) 4113210, [email protected]
Get access

Abstract

Meet the technical specifications defined by the designengineering department is a critical factor to haveof a good performance during the normal life cycle of heavy mining equipment. This study was done to determine how the repair process carried out in order to recover structuralcomponents that did not meet the proper quality criteria after the inspection process,can alter the microstructure and the mechanical properties of the product used in the construction of heavy miningequipment.

As the repair process can be donenot only once, but twice and until three times using a manual GMAW process, this study was carried out under controlled conditions and using similar process parameters as those used in the manufacturing process. A set of four specimens were prepared, one without any repair, and the other three with one, two and three repairs. In order to evaluate the sanity of the welded unions and also the materials behavior of each one of the specimens, tensile, microhardness, macroetch, charpy, and metallographic testswere carried out

Keywords

Key wordsMicrostructureWeldingHardnessMechanical TestScanning electron microscopy (SEM)
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1381: Symposium S22 – Materials Welding and Joining Technologies , 2012 , imrc11-1381-S22-026
Copyright
Copyright © Materials Research Society 2012

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Georgiev, M. N., Mezhova, N. Ya., Minaev, V.N., and Simonov, Yu N., “Structural Aspects the cyclic crack resistance of hardened and tempered steels, MetallovedenieTermicheskayaobrabotkametallov, No. 6, pp24–25, June, 1988 Google Scholar
2. Gunaraj, V., Murugan, N, Welding Journal, October 2000, Prediction and optimization of Weld bead volume for submerged arc process part 1, pp 283–294 Google Scholar
3. Yang, L.J., Chandel, R.S., Bibby, M.J., Journal of Materials Processing Technology, 1992, The effects of process variables on the bed width of submerged arc weld deposits Google Scholar
4. London, B., Nelson, D.V. and Shyne, J.C., “ The Effect of Tempering Temperature on Near-Threshold Fatigue Crack Behavior in Quenched and Tempered 4140 Steel “Metallurgical Transactions A, Volumen 19A, Octubre 1988, pp 1988–2497 Google Scholar
5. Shia, Yaowu, ZhunxiangHanb, “ Effect of weld thermal cycle on microstructure and fracture toughness of simulated heat-affected zone for a 800MPa grade high strength low alloy steel. “Journal of materials processing technology No. 207 “ (2008)pp 30–39 Google Scholar
6. Magudeeswaran a, G., Balasubramanian, V., Madhusudhan Reddy, G. “ Effect of Welding processes and consumables on high cycle fatigue life of high strength, quenched and tempered steel joints “, Materials and Design No.29 (2008) pp1821–1827 Google Scholar