Optimization of Process Parameters for Friction Welding of Bimetallic Welds

2012 ◽  
Vol 585 ◽  
pp. 440-444
Author(s):  
Rahul Chhibber ◽  
Yogesh Kumar Singla ◽  
Bijan Kumar Dutta
Keyword(s):  
Friction Welding ◽  
Arc Welding ◽  
Structural Changes ◽  
Dissimilar Materials ◽  
Austenitic Stainless Steels ◽  
Inert Gas ◽  
Welding Parameters ◽  
Shielded Metal Arc Welding ◽  
Optimization Of Process Parameters ◽  
Metal Arc Welding

Bimetallic welds made between ferritic steels and austenitic stainless steels are conventionally fabricated using arc welding procedures such as Tungsten Inert Gas, Metal Inert Gas, Shielded Metal Arc Welding and Submerged Arc Welding. However friction welding provides a new and unique solid state approach for joining many similar and dissimilar materials, which may not be possible to join by other welding techniques available without adding any external filler metal. This approach is mostly used in joining of dissimilar materials. The reason for increased utility being the absence of any external filler material which may otherwise add to the heterogeneity of the weld structure. In this paper, the fabrication and effect of friction welding parameters on mechanical-micro structural changes of bimetallic weld joints has been discussed. An attempt has also been made to relate the effect of friction welding parameters on the peak temperature values taken near faying surface and micro hardness changes measured in various zones of weld.

Feasibility Studies on the Modeling and Evaluation of Residual Stresses in Arc Welded Butt Joints

2006 ◽  
Author(s):  
K. Satyambabu ◽  
N. Ramachandran
Keyword(s):  
Residual Stress ◽  
Residual Stresses ◽  
Arc Welding ◽  
Thermal Loading ◽  
Submerged Arc Welding ◽  
Pressure Vessels ◽  
Welding Parameters ◽  
Shielded Metal Arc Welding ◽  
Metal Arc Welding ◽  
Submerged Arc

Many important engineering applications such as nuclear reactors, ships, pipes and pressure vessels are shell-like structures made with weldments. For such a structure, a major problem is the development of residual stress and distortion due to welding. Residual stresses in weldments significantly affect stress corrosion cracking, hydrogen-induced cracking and fatigue strength in welded structures. As-welded components generally have certain amount of residual stresses caused by the application of intense heat or thermal loading at the weld joint, formed due to non-uniform cooling rates at different points in the weld metal and heat affected zones. Presence of residual stresses in a component is detrimental as they may lead to failure below the design stress value and also affect many important properties including the life of a welded component. Welding induced residual stresses can significantly increase the fracture driving force in a weldment and also contribute to brittle fracture. The thermal cycle imposed on any welded object causes thermal expansions and contractions which are not uniform. Quantitative measurement of residual stresses is essential to take remedial measures such as change in the welding technique, optimizing welding parameters (heat input, electrode diameter etc,), change in the weld groove design and post-weld heat treatment for minimizing the residual stresses. Residual stress measurements after post-weld treatment would also ensure the adequacy of stress relief treatment. To have an investigation into these aspects, residual stresses due to Manual Metal Arc Welding and Submerged Arc Welding were measured nondestructively with Ultrasonic technique. Residual stress distribution for Shielded Metal Arc Welding and Submerged Arc Welding were compared and the present studies emphasized, that Shielded Metal Arc Welding gave higher compressive stresses than Submerged Arc Welding. Further, to substantiate the studies, commercial finite element analysis software ANSYS 5.6 was used for modeling of manual metal arc welded joint. The results obtained by ANSYS were compared with those by Ultrasonic method.

Microstructures and Mechanical Properties of Weld Joint between B610CF and 16MnR Steel

2010 ◽  
Vol 139-141 ◽  
pp. 352-355 ◽  
Author(s):  
Tian Hui Zhang ◽  
Hong Cai Fu ◽  
Pei Jun Yan ◽  
Fang Wei Jin ◽  
Qiong Wang
Keyword(s):  
Mechanical Property ◽  
Weld Joint ◽  
Heat Affected Zone ◽  
Arc Welding ◽  
Welding Parameters ◽  
Shielded Metal Arc Welding ◽  
Weld Joints ◽  
Welding Method ◽  
Metal Arc Welding ◽  
Strength And Plasticity

Weldability analysis, metallographic experiments and mechanical property experiments were carried out on weld joint between B610CF and 16MnR steel using shielded metal arc welding method and mixed active-gas arc welding method. Weldability analysis shows that the weld joint has some tendency to cold crack, and preheat is needed before welding. Metallographic results show that there are ferrite and bainite in weld metal, and in heat-affected zone of B610CF side there are ferrite and bainite, on which there is much dispersed slight Fe3C, and in heat-affected zone of 16MnR side there are ferrite, pearlite. There is no quenching microstructure resulting in crack in weld joint. From mechanical property results, it can be concluded that the weld joints have excellent impact toughness at low temperature and the tensile strength and plasticity of weld joints is matched to the ones of 16MnR steel. So the welding parameters in this paper are appropriate to get qualified weld joints.

scholarly journals RESEARCH OF TECHNOLOGICAL PROPERTIES OF STEEL X6CRNITI18-10 WELDED JOINTS EXPLOITED IN NITRIC ACID MEDIUM / PLIENO X6CRNITI18-10, EKSPLOATUOJAMO AZOTO RŪGŠTIES TERPĖJE, VIRINTINIŲ JUNGČIŲ TECHNOLOGINIŲ SAVYBIŲ TYRIMAS

2016 ◽  
Vol 7 (6) ◽  
pp. 613-618
Author(s):  
Gediminas Mikalauskas ◽  
Olegas Černašėjus
Keyword(s):  
Arc Welding ◽  
Inert Gas ◽  
Welding Parameters ◽  
Resistant Steel ◽  
Technological Properties ◽  
Tungsten Inert Gas Welding ◽  
Transverse Tensile ◽  
Metal Arc Welding ◽  
Covered Electrodes ◽  
Long Time

The repair of chemical industry equipments often requires to replace long time operated pipes or welded inserts with the simi-lar chemical composition. During the study the joints from corro-sion resistant steel X6CrNiTi18-10 were welded by manual metal arc welding with covered electrodes (MMA process 111) and tungsten inert gas welding (TIG process 141) at different welding parameters. The visual, radiographic, penetrant control and ferrite content analysis were carried out. The transverse tensile and bending samples were produced from welded samples; also the macroscopic and microscopic analyse were carried out. Atliekant chemijos pramonės įrenginių remontą, dažnai tenka pakeisti ilgą laiką eksploatuotus vamzdžius ar įvirinti analogiškos cheminės sudėties intarpus. Tyrimo metu suvirintų jungčių bandomieji pavyzdžiai iš korozijai atsparaus plieno X6CrNiTi18-10 buvo suvirinti rankiniu lankiniu būdu glaistytaisiais elektrodais (111 MMA procesas) ir lankiniu suvirinimu volframo elektrodu inertinėse dujose (141 TIG procesas), esant skirtingiems suvirinimo režimų parametrams. Suvirintiems bandiniams buvo atlikta vizualinė, radiografinė, spalvinė kontrolė, nustatytas išsiskyrusio ferito kiekis. Iš suvirintų ruošinių buvo pagaminti skersinio tempimo, lenkimo bandiniai, taip pat atlikti virintinių jungčių makroskopinis ir mikroskopinis tyrimai.

INCO-WELD B ELECTRODE

Alloy Digest ◽  
1984 ◽  
Vol 33 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Tensile Properties ◽  
Arc Welding ◽  
Base Alloy ◽  
Heat Treating ◽  
Alternating Current ◽  
Nickel Base Alloy ◽  
Shielded Metal Arc Welding ◽  
Metal Arc Welding ◽  
Nickel Base

Abstract INCO-WELD B is a nickel-base alloy developed for shielded metal-arc welding of nickel steels for cryogenic applications. It is similar to INCO-WELD A Electrode (Alloy Digest Ni-305, November 1984) except that it is designed for use with alternating current to minimize magnetic arc blow. It can be operated in all welding positions. This datasheet provides information on composition and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-307. Producer or source: Huntington Alloys.

INCO-WELD C

Alloy Digest ◽  
1996 ◽  
Vol 45 (1) ◽  
Keyword(s):  
Tensile Properties ◽  
Stainless Steels ◽  
Arc Welding ◽  
Carbon Steels ◽  
Alloy Electrode ◽  
Shielded Metal Arc Welding ◽  
Medium Carbon ◽  
Metal Arc Welding ◽  
Spring Steels ◽  
Medium Carbon Steels

Abstract INCO WELD C Electrode is a stainless-alloy electrode especially designed for shielded-metal-arc welding of a broad range of materials, including many difficult-to-weld compositions. It can be used in stainless steels, mild and medium-carbon steels,and spring steels. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on joining. Filing Code: SS-632. Producer or source: Inco Alloys International Inc.

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