Microstructure and Wear Characterization of the Fe-Mo-B-C—Based Hardfacing Alloys Deposited by Flux-Cored Arc Welding

Bembenek, Michał; Prysyazhnyuk, Pavlo; Shihab, Thaer; Machnik, Ryszard; Ivanov, Olexandr; Ropyak, Lіubomyr

doi:10.3390/ma15145074

Cited by 47 publications

(21 citation statements)

References 101 publications

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“…A characteristic feature drilling and oil and gas equipment is used in its composition of a large number of threaded ones connections. Reliability and durability of threaded connections is achieved through a rational approach selection of materials and coatings [4,5,6], precision parameters of mechanical processing [7,8,9] and indicators of the quality of the working surfaces of the nozzles [10,11,12], including taking into account the technological heredity [13], and lubrication [14] to ensure the operability of products throughout their lifetime cycle [15,16].…”

Section: Literature Reviewmentioning

confidence: 99%

Accuracy of Thread Profile Depends on the Lathe Tool Angle of Inclination. Theoretical Investigation

Onysko

Kusyi

Kopei

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Among threaded connections of large sizes, tapered thread pipe connections are especially often used, which are a very important part of drill strings. The efficiency of the drill strings largely depends on the accuracy of the tool-joint tapered thread. The production of such joints is implemented on lathes, with the help of tools that have a carbid insert. To ensure high performance, such inserts are recommended to be installed not parallel to the axis of the thread, but at the lead angle of thread. However, the profile of the insert itself is equal to the profile of the thread, and therefore it is important to have a theoretical predictive calculation of the probable influence of the angular setting of the carbide insert on the accuracy of the thread. Based on a detailed consideration of the geometry of the mutual placement of the plate and the tapered thread and the kinematic features of the process, an algorithm for predictive calculation of the accuracy of the thread is created. The result shows that only one of the parameters of the cutting edge really depends on the angle of inclination of the cutting edge - it is its profile. The deviation can reach 7% of the tolerance on the semi-profile angle.

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Section: Literature Reviewmentioning

confidence: 99%

Accuracy of Thread Profile Depends on the Lathe Tool Angle of Inclination. Theoretical Investigation

Onysko

Kusyi

Kopei

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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“…When high hardness is required, one of the best choices for regeneration might be a cored wire, used in GMAW (Gas Metal Arc Welding) technology due to its availability, cost-effectiveness and relative easiness of application. The resulting hard coating can have higher resistance to abrasion than the base material (usually a construction steel), thus the part, being a quasi-composite, can achieve the desired properties at low effort [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…In order to achieve assumed geometrical features, finding the proper technological parameters is critical. Other research teams [ 12 ] took into account the influence of the current, voltage, welding speed, wire feed and the welding gun orientation on the quality of the resulting padding; however, optimal parameters have to be found both for the particular part application and every pair of base and filler materials. The mathematical model for predicting the weld bead shape, developed by Kumari and Singh [ 14 ], matches the experimental results nearly perfectly; however, their studies were focused only on 140 MXC welding wire, thus their model is not universal.…”

Section: Introductionmentioning

confidence: 99%

On the Influence of Linear Energy/Heat Input Coefficient on Hardness and Weld Bead Geometry in Chromium-Rich Stringer GMAW Coatings

et al. 2022

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Wear of the working surfaces of machinery parts is a phenomenon that cannot be fully countered, only postponed. Among surface lifecycle elongation techniques, hardfacing is one which is most often used in heavy load applications. Hardfaced coating can be applied using different welding approaches or thermal spraying technologies, which differ when it comes to weld bead dimensional precision, layer thickness, process efficiency and material. In this study the authors examine the geometrical behavior and hardness properties of two distinctive chromium-based Gas Metal Arc Welding (GMAW) cored wires. The stringer beads are applied numerically with five levels of linear energy, being a resultant of typical values of welding speed and wire feed, ranging between 250 mm/s to 1250 mm/s (welding speed) and 2 m/min to 10 m/min (wire feed). The samples were cut, etched and measured using a digital microscope and Vickers indenter, additionally the chemical composition was also examined. Hardness was measured at five points in each cutout, giving 40 measurements per sample. The values were analyzed using an ANOVA test as a statistical background in order to emphasize the divergent behavior of the cored wires. It appeared that, despite having less chromium in its chemical composition, wire DO*351 exhibits higher hardness values; however, DO*332 tends to have a more stable geometry across all of the heat input levels.

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“…Crystallization and solidifcation are fundamental aspects of casting processes, the control of which makes it possible to control the structure and fnal mechanical properties of the casting. It is extremely important to take this into account when designing shells (for example, bearing links of shock absorbers) [6], plates (for example, power elements of centralizers) [7], and layered structures [8] that are subjected to extremely high-operating loads throughout the life cycle.…”

Section: Introductionmentioning

confidence: 99%

Research Thermal Fields in the Crystallization Process of Steel Cast Parts

Liutyi

Petryk

Mogylatenko

et al. 2022

Advances in Materials Science and Engineering

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In foundry production, the duration of metal crystallization of the cast part, as well as the distribution of the thermal field, are described by systems of analytical equations. There are a number of methods for modeling these processes, but their theoretical basis was formed at the end of the twentieth century, and it needs to be updated and clarified. Therefore, the aim of our work is to develop a new analytical method for researching the distribution of thermal fields in cast parts during crystallization. For the first time, on the basis of own analytical and thermophysical developments, it developed the analytical method for researching the thermal field of the casting during crystallization and cooling, which is based on establishing the kinetics of cooling of the casting surface in the foundry mold, the advancement of the crystallization front from the surface to the center of the casting, and the distribution of temperatures in the solid and liquid parts of the casting. The method is expressed in a number of analytical formulas, each of which describes the specific thermal process that occurs in the casting. The developed analytical method was used to research the crystallization of the casting in a one-time sand mold, using the example of researching the thermal field of the cast part made of carbon steel with 0.25% C, hollow cylindrical shape, with the wall thickness of 100 mm. The developed analytical method for researching the thermal fields of cast parts is the analytical basis for the refinement of applied computer programs for modeling crystallization and cooling processes in foundry production.

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Microstructure and Wear Characterization of the Fe-Mo-B-C—Based Hardfacing Alloys Deposited by Flux-Cored Arc Welding

Cited by 47 publications

References 101 publications

Accuracy of Thread Profile Depends on the Lathe Tool Angle of Inclination. Theoretical Investigation

Accuracy of Thread Profile Depends on the Lathe Tool Angle of Inclination. Theoretical Investigation

On the Influence of Linear Energy/Heat Input Coefficient on Hardness and Weld Bead Geometry in Chromium-Rich Stringer GMAW Coatings

Research Thermal Fields in the Crystallization Process of Steel Cast Parts

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