The Study of Metallurgy Structure of 50-Pound Sized of Railway Hard Surfacing Welding by Shielded Metal Arc Welding Process

  • Arawan Chanpahol อาจารย์ สาขาวิชาเทคโนโลยีการผลิต คณะเทคโนโลยีการเกษตรและเทคโนโลยีอุตสาหกรรม มหาวิทยาลัยราชภัฏเพชรบูรณ์
Keywords: 50-Pound sized of railway hard surfacing welding, Shielded metal arc welding


This study was focused on metallurgy structure by railway hard surfacing welding process from shielded metal arc welding (SMAW). The material in the study was 50-pound sized railway. The two major variables were hard surfacing electrodes: HF 350R and HF 450R. After welding experiment, there was no crack appearing on welding surface. However, small metal particles scattered distribution the surface of the welds of two variables.   From macroscopic examination of metals, there were no crack or porosity in the welding zone. In heating influenced area of welding with HF 350R welding rod, the thermal radiation was less than welding with HF 450R. From microscopic examination of metals with HF 450R rod, the structure was clearer than welding with HF 350R.    In the heating area, it consisted of ferrite mixed with martensite structures which mostly occurred from welding with HF 450R rod. From microscopic examination of metals, there were no crack or porosity in welding zone. 


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1. Parighatprecha R, Suthasupradit S, Paoleng P. Engineering Viewpoint in Raising the Speed of Railway, Engineering Journal. 2014; Vol.67, No.5.

2. Correa N, Vadillo EG, Santamaria J, Herreros J. A Versatile Method in the Space Domain to Study Short-Wave Rail Undulatory Wear Caused by Rail Surface Defects. University of the Basque Country UPV/EHU. 2016; 48013 Bilbao. Spain.

3 Herbst B. Wear Investigations on Wheel and Rail Materials. Research Report 6119704, Research and Technology Center of the DB AG, Kirchmöser; 1998.

4. Dunyakul Y, Maunkhaw D, Kwangtung S. Investigation of Wear Behaviors of Surface Welding Steel AS3678 Grade 350. IE Network Conference. 2012; Cha-am Phetchaburi, Thailand.

5 Poznyakov VD, Kiriakov VM, Gajvoronsky AA, Klapatyuk AV, Shishkevich OS. Properties of Welding Joints of Rail Steel in Electric Aac Welding. Paton Electric Welding Institute, NASU, Kiev, Ukraine; 2010.

6. Embury JD, Fisher RM. The Structure and Properties of Drawn Pearlite. Acta Met. 1966; 14, 147-159.

7. Sojiphan K, Lertpatipolchai A, Krittapas S, Chaichumpoo N. Microstructure and Hardness Analysis of Railway Steel Subjected to Thermite Welding. TRAS Conference Paper. 2017; Thailand.

8. Allie A, Aglan H, Fateh M. Mechanical and Fracture Analysis of Welded Pearlitic Rail Steels. Journal of Mechanics of Material and Structure. 2010; Vol.5, No.2.

9 Callister WD, Rethwisch DG. Phase Transformations Development of Microtructure and Alteration of Mechanical Properties, Materials Science and Engineering An Introduction, Ninth Edition. 2014; New Jersey.

10. Hee-jin L, Hae-woo L. Effect of Cr Content on Microstructure and Mechanical Properties of Low Carbon Steel Welds. Department of Materials Science and Engineering, Dong-A University, 840 Hadan-dong, Saha-gu, Busan. 2015; 604-714. Korea.

11. Wetscher F. Fracture Processes in Severe Plastic Deformed Rail Steels. Erich Schmid Institute for Materials Science, Austrian Academy of Science, Leoben. 2007; Austria.

12 Zerbst U, Lund R, Edel K.-O, Smith RA. Introduction to the Damage to Lerance Behaviour of Railway Rails – a Review. Engineering Fracture Mechanics. 2009; 2563–2601. Germany.