Dissimilar Metal Welding of AISI 4130 Steel To 18% NI Mararing Steel
D. Dhanapal1, S. Venkateswarlu2, B. Jayachandraiah3
1D. Dhanapal, P.G Student, Department Of Mechanical Engineering, Sri Kalahasteeswara Institute Of Technology, Srikalahasti. (A.P.), India.
2S. Venkateswarlu, Assistant Professor, Department Of Mechanical Engineering, Sri Kalahasteeswara Institute Of Technology, Srikalahasti. (A.P.), India
3AP. Dr. B. Jayachandraiah, Head & Vice-principal, Department Of Mechanical Engineering, Sri Kalahasteeswara Institute Of Technology, Srikalahasti. (A.P.), India
Manuscript received on 21 January 2013 | Revised Manuscript received on 28 January 2013 | Manuscript published on 30 January 2013 | PP: 8-13 | Volume-1 Issue-6, January 2013 | Retrieval Number: F0388021613/2013©BEIESP
Open Access | Ethics and Policies | Cite | Mendeley | Indexing and Abstracting
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Maraging steels are ultra-high strength and high toughness steels used in the rocket motor casing, leaf springs, landing gears etc. They obtain their strength and toughness from precipitation hardening. The strength of AISI 4130 steels is obtained by austenizing followed by quenching and tempering. They obtain their strength from martensite phase transformation. As the heat treatment for the two steels are different due to different hardening mechanisms, an optimum heat treatment needs to be developed to obtain maximum strength for the dissimilar welding of this two materials. Weldments are often made from dissimilar metals in order to satisfy different requirements for performance. A successful weld between dissimilar metals is that it possesses sufficient tensile strength and ductility so that the joint will not fail. In the present work, 18%Ni (250) maraging steel was joined to AISI 4130 low alloy steel by TIG welding with W2 maraging steel filler wire. These dissimilar welds were realized with two different material conditions. The first condition is welding of solutionised maraging steel to hardened and tempered AISI 4130 steel. The second condition is welding of aged maraging steel to hardened and tempered AISI 4130 steel. The dissimilar welds we subjected to non-destructive testing i.e. X-ray radiography and subsequently subjected to different post weld heat treatment cycles depending on the initial material condition. The joints were offered for microstructure and mechanical property evaluations such as ultimate tensile strength, yield strength and % elongation. The model of the specimen was created using the CATIA software. The model was meshed using software ABAQUS. Boundary conditions were given on the finite element model through ABAQUS.
Keywords: Dissimilar Metal Welding, AISI 4130, MDN 250, 18% Ni Maraging Steel.
Scope of the Article: Welding Technology