Analisa Heat Input Pengelasan terhadap Distorsi, Struktur Mikro dan Kekuatan Mekanis Baja A36

Heri Wibowo, M.Noer Ilman, Priyo Tri Iswanto

Abstract


The minimization of weld distortion has become an important subject of research in welding. Severe distortion can cause undesirable influence on the cost of fabrication since additional work or repair needs to be performed. In addition, distortion also reduce dimensional accuracy and even loss of structural integrity. The present investigation aims to reduce welding distortion on A36 steel by controlling heat input during Metal Inert Gas (MIG) welding. The welding process was carried out by maintaining constant voltage and current of 23 Volt and 145 Ampere respectively whereas travel speed was varied in the range of 3.9 to 4.9 mm/s giving heat input of 678 to 936 J/mm. Result of this investigation showed that the welding distortion was achieved at the heat input of 756 J/mm. At this heat input, the percentage of acicular ferrite is maximized resulting in good weld impact toughness.


Keywords


Heat Input; Distortion; Microstructure

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References


Wiryosumarto, H., dan Okumura, T., (2000), Teknologi Pengelasan Logam, Pradnya Paramita, Jakarta.

Michaleris, P., (2011), Minimization of welding distortion and buckling (Modelling and implementation), Woodhead Publishing, Cambridge CB22, UK.

Wenkai, X., Li, Z., Fuju, Z., Kezun, D., Xian, Z., Xue, Y., Bingjun, C., (2015), Effect of heat input on cryogenic toughness of 316LN austenitic stainless steel NG-MAG welding joints with large thickness, Material and Design Journal 86 p.p 160-167.

Popovic, O., Cvetkovic, R.P., Burzic, M., Milutinovic, Z., (2010), The effect of heat input on the weld metal toughness of surface welded joint, International Research/Expert Conference 14th, Mediterranean.

Kianersi, D., Mostafaei, A., Amadeh, A., (2014), Resistance spot welding joints of AISI 316L austenitic stainless steel sheets: Phase transformations, mechanical properties and microstructure characterizations, Materials dan Design Journal 61 pp. 251 – 263.

Waheed, R., Shakoor, A., Azam, K., Khan, A., Shah, F., (2015), Welding Distortion Control in Thin Metal Plates by Altering Heat Input through Weld Parameter, Technical Journal, UET Taxila, Pakistan Vol. 20(SI) No.II

Andritsos, F., Prat, J. P., (2000), The otomation and integration of production processes in ship building, Joint Reserch Center, European Commission.

American Society for Testing and Materials, 1999, ASTM A36 : Standard specification for Carbon Steel , Wahington D.C, USA.

Cobe Steel (1991), Cobelco Welding Handbook, Cobelco welding of America Inc, USA.

Miller Electric (2012), Guidelines For Gas Metal Arc Welding

(GMAW), Tool Work Company, Appleton, USA

Yoshiki, et al., (2006), Measurement and Numerical Simulation of Angular Distortion of Fillet Welded T-joint, Japan Welding Society vol.24, No. 4(20061105), pp.312-323.

American Society for Testing and Materials, 2010, ASTM E-8: Standard Test Methods for Tension Testing of Metallic Materials, Pennsylvania, USA.

American Society for Testing and Materials, 1997, ASTM A 370: Standard Test Methods and Definitions for Mechanical Testing of Steel Products, West Conshohocken, PA 19428-2959, United States.

Goldak, J., Chakravanti, A., and Bibby, M., (1982), A new Finite Element Model for Welding Heat Sources, Metalurgical Transaction B, vol. 15 B.

Radaj, D., (1992), Heat Effects of Welding, Springer-Verlag, Berlin, Heidelberg.

Lee, J.S., Jeong, S.H., Lim, D.Y., Yun, J.O., and Kim, M.H., (2010), Effects of Welding Heat and Travel Speed on the Impact Property and Microstructure of FC Welds, Met. Mater. Int., Vol. 16, No. 5 (2010), pp. 827~832

Lakshminarayanan, A.K. and Balasubramanian, V., (2011), Tensile and Impact Toughness Properties of Gas Tungsten Arc Welded and Friction Stir Welded Interstitial Free Steel Joints, Journal of Materials Engineering and Performance Volume 20(1) February 2011, p.p 82- 89




DOI: http://dx.doi.org/10.21776/ub.jrm.2016.007.01.2

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