Design of TiO2–SiO2–MgO and SiO2–MgO–Al2O3-Based Submerged Arc Fluxes for Multipass Bead on Plate Pipeline Steel Welds
01 Aug 2019-Journal of Pressure Vessel Technology-transactions of The Asme (American Society of Mechanical Engineers)-Vol. 141, Iss: 4, pp 041402
TL;DR: In this paper, the chemical composition, grain size, and microhardness properties of the multipass bead on a plate (for API 5 L X70 grade pipeline) were optimized using multi-objective optimization approach.
Abstract: High strength low alloy steels are extensively used in different applications like oil and gas transmission line pipes, pressure vessels and offshore oil drilling platforms. Submerged arc welding (SAW) is mainly used to weld high thickness steel plates. Flux composition and welding parameters play an important role in determining the adequate quality and mechanical properties of the weld. Agglomerated fluxes were formulated based on TiO2–SiO2–MgO and SiO2–MgO–Al2O3 flux system using constrained mixture design and extreme vertices design approach. The chemical compositions of the bead on a plate have been studied using formulated fluxes. Twenty-one beads on plates were applied using submerged arc welding process keeping the parameters: current, voltage, and welding speed constant. Regression models were developed for bead on plate content in terms of individual, binary, and ternary mixture flux constituents for submerged arc multipass bead on plate deposition for pipeline steel (API 5 L X70). In the present study, chemical composition, grain size, and microhardness properties of the multipass bead on a plate (for API 5 L X70 grade pipeline) were optimized using multi-objective optimization approach.
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TL;DR: In this paper, the physicochemical and thermo-physical properties of CaO-CaF2-SiO2 and CaO−TiO2-O2 based electrode coating for welding offshore structures were investigated.
25 citations
TL;DR: In this article, physicochemical and thermo-physical properties of slags obtained from CaO-CaF2-SiO2-Al2O3 based shielded metal arc welding electrodes were investigated.
18 citations
TL;DR: In this article, the design and development of shielded metal arc welding (SMAW) electrode coating using extreme vertices design methodology has been discussed, where red ochre, a mineral waste from iron ore is added in the coating composition to study the effect of individual constituents and their interactions on the weld chemistry and microhardness.
Abstract:
Offshore structures in recent time are witnessing the increased application of dissimilar metal welds for enhanced structural integrity. Offshore structures are complex systems. Fabrication, maintenance, and repair of these structures require conventional and advanced welding technologies along with suitably chosen welding consumables. The present work aims at the design and development of shielded metal arc welding (SMAW) electrode coating using extreme vertices design methodology. This work also attempts to study weld metal chemistry along with microstructure and microhardness. Red ochre, a mineral waste from iron ore is added in the coating composition. Multi response optimization has been carried out to obtain optimum flux composition and to study the effect of individual constituents and their interactions on the weld chemistry and microhardness.
14 citations
TL;DR: In this article, the effect of CaO-CaF2-TiO2-SiO2 based electrode coating constituents and their binary, tertiary interactions on the weld metal chemistry of offshore structure was reported.
14 citations
TL;DR: In this article , the physicochemical and thermophysical properties of CaO-TiO2-SiO2−Na3AlF6 based electrode coating developed for the welding of advanced ultra-supercritical (AUSC) thermal power plant components were investigated.
13 citations
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TL;DR: In this article, the authors present a set of conditions that will result in a product with a desirable combination of properties, which is a problem facing the product development community in general.
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TL;DR: One of the popular books now is the phase diagrams for ceramists as discussed by the authors. You may be confused because you can't find the book in the book store around your city. And when you have found the store to buy the book, it will be so hurt when you run out of it.
Abstract: It's not surprisingly when entering this site to get the book. One of the popular books now is the phase diagrams for ceramists. You may be confused because you can't find the book in the book store around your city. Commonly, the popular book will be sold quickly. And when you have found the store to buy the book, it will be so hurt when you run out of it. This is why, searching for this popular book in this website will give you benefit. You will not run out of this book.
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TL;DR: In this paper, the original Mixture Problem is described and models for exploring the Entire Simplex Factor Space are presented, including matrix algebra, least squares, and the analysis of variance.
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TL;DR: A review of some basic statistical concepts some intermediate data analysis concepts A Scientific Approach to Experimentation Completely Randomized Design (CRD) Randomized Complete Block Design (RCBD) Nested (Hierarchical) and Nested Factorial Designs Split Plot Type Design Latin Square Type Designs 2n Factorial Experiments (Complete and Incomplete Blocks) Fractional Factorial Experimentations for Two-Leveled Factors Three-Level Factorial Experience (FFE) Mixed FactorialExperiments and Other Incomplete Block Designs Response Surface Exploration Appendices
Abstract: Review of Some Basic Statistical Concepts Some Intermediate Data Analysis Concepts A Scientific Approach to Experimentation Completely Randomized Design (CRD) Randomized Complete Block Design (RCBD) Nested (Hierarchical) and Nested Factorial Designs Split Plot Type Design Latin Square Type Designs 2n Factorial Experiments (Complete and Incomplete Blocks) Fractional Factorial Experiments for Two-Leveled Factors Three-Level Factorial Experiments Mixed Factorial Experiments and Other Incomplete Block Designs Response Surface Exploration Appendices
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03 Apr 1980
TL;DR: The effect of surface forces on the bonding of materials was studied in this article. But the authors focused on the behavior of welds in service and did not consider the effects of the weld thermal cycle.
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386 citations