Thermodynamic Approach to the Development and Selection of Hardfacing Materials in Energy Industry

Shihab, Thaer; Prysyazhnyuk, Pavlo; Semyanyk, Iryna; Anrusyshyn, Roman; Ivanov, Olexandr; Troshchuk, Lyubomyr

doi:10.2478/mspe-2020-0013

Cited by 16 publications

(10 citation statements)

References 46 publications

(35 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thermodynamic calculations were carried out using the CALPHAD (CALculation of PHAse Diagrams) procedure employing the OpenCalphad programming code [25] and the thermodynamic functions given in works [26][27][28].…”

Section: Materials and Methodology To Study The Influence Of Si And Cmentioning

confidence: 99%

Analysis of the effects of alloying with Si and Cr on the properties of manganese austenite based on AB INITIO modelling

Prysyazhnyuk

Shlapak

Semyanyk

et al. 2020

EEJET

Self Cite

View full text Add to dashboard Cite

Section: Materials and Methodology To Study The Influence Of Si And Cmentioning

confidence: 99%

Analysis of the effects of alloying with Si and Cr on the properties of manganese austenite based on AB INITIO modelling

Prysyazhnyuk

Shlapak

Semyanyk

et al. 2020

EEJET

Self Cite

View full text Add to dashboard Cite

“…The thermodynamic analysis of the phase equilibrium in the Fe-Mo-B-C system's polythermal cross-sections, corresponding to the coatings' composition, was performed using the Thermo-Calc and OpenCalphad software [17]. The modeling was carried out by extrapolating the thermodynamic functions of the lower order systems, specifically Fe-Mo-C [18], Fe-B-C [19], Fe-Mo-B [4], as well as the data given in work [20].…”

Section: The Materials and Procedures To Study The Structure And Propementioning

confidence: 99%

In situ formation of molybdenum borides at hardfacing by arc welding with flux-cored wires containing a reaction mixture of B4C/Mo

Prysyazhnyuk¹,

Shlapak²,

Ivanov³

et al. 2020

EEJET

Self Cite

View full text Add to dashboard Cite

This paper reports a study into the formation of the phase composition, structure, and properties of arc welding coatings by the flux-cored electrode materials from the Fe-MoB -C system. The welding alloys were applied using the flux-cored arc welding (FCAW) electrodes, which consisted of a shell made from the low-carbon steel filled with a reaction powder mixture that contained boron carbide and molybdenum in a ratio of 1:1. The calculation of the phase composition of alloys that correspond to the surfaced layers by a CALPHAD method using the Thermo-Calc OpenCalphad software shows that under the equilibrium conditions the boride phases of molybdenum and ferrite cannot co-exist. The main phase of such alloys is a FeMo 2 B 2 compound, which forms the eutectics with austenite. Given that the eutectic structures with borides are characterized by high brittleness, the introduction of components was conducted in the form of a reaction mixture in order to obtain the in situ formed boride phases in the form of separate structural components. Analysis of the results of studying the microstructure and phase composition of coatings reveals that they consist of three main structural components: the eutectic (FeMo 2 B 2 +ferrite) and the grains of molybdenum tetraboride MoB 4. Thus, under the conditions of arc welding using the reaction mixture, an irregular structure is formed, which is favorable in terms of ensuring wear resistance due to the high microhardness of MoB 4 >27 GPa. The hardness of the coatings obtained is at the level of 63-65 HRC, and the wear resistance is higher compared to standard high-chromium alloys (grades Т620 and Т590) by 2-2.5 times. This makes it possible to recommend the coating of a given system for hardfacing the working surfaces of equipment in the coal, processing, woodworking industries, etc., where abrasive wear is the dominant type of surface wear

show abstract

“…The favorable combination of properties between the reinforced surface layer and the base metal can be achieved by using various surface engineering processes. Extension of the service life of critical parts is provided by the methods of hardening using surface deformation [ 40 , 41 ], electrochemical Cr plating [ 42 , 43 ], chemical-thermal treatment [ 44 , 45 ], electrospark doping [ 46 , 47 ], laser doping [ 48 , 49 , 50 ], laser cladding [ 51 ], plasma hardening [ 52 , 53 ], thermal spraying [ 54 , 55 ], supersonic spraying [ 56 , 57 , 58 ], vacuum-arc deposition [ 59 , 60 , 61 ], formation of oxide and nitride coatings by combined methods [ 62 , 63 , 64 , 65 , 66 , 67 ], manual arc hardfacing [ 68 , 69 ], and flux-cored arc welding [ 70 , 71 , 72 , 73 , 74 , 75 , 76 ].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

Self Cite

View full text Add to dashboard Cite

An analysis of common reinforcement methods of machine parts and theoretical bases for the selection of their chemical composition were carried out. Prospects for using flux-cored arc welding (FCAW) to restore and increase the wear resistance of machine parts in industries such as metallurgy, agricultural, wood processing, and oil industry were presented. It is noted that conventional series electrodes made of tungsten carbide are expensive, which limits their widespread use in some industries. The scope of this work includes the development of the chemical composition of tungsten-free hardfacing alloys based on the Fe-Mo-B-C system and hardfacing technology and the investigation of the microstructure and the mechanical properties of the developed hardfacing alloys. The composition of the hardfacing alloys was developed by extending the Fe-Mo-B-C system with Ti and Mn. The determination of wear resistance under abrasion and impact-abrasion wear test conditions and the hardness measurement by means of indentation and SEM analysis of the microstructures was completed. The results obtained show that the use of pure metal powders as starting components for electrodes based on the Fe-Mo-B-C system leads to the formation of a wear-resistant phase Fe(Mo,B)2 during FCAW. The addition of Ti and Mn results in a significant increase in abrasion and impact-abrasion wear resistance by 1.2 and 1.3 times, respectively.

show abstract

Thermodynamic Approach to the Development and Selection of Hardfacing Materials in Energy Industry

Cited by 16 publications

References 46 publications

Analysis of the effects of alloying with Si and Cr on the properties of manganese austenite based on AB INITIO modelling

Analysis of the effects of alloying with Si and Cr on the properties of manganese austenite based on AB INITIO modelling

In situ formation of molybdenum borides at hardfacing by arc welding with flux-cored wires containing a reaction mixture of B4C/Mo

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

Contact Info

Product

Resources

About