Investigations into the wear rate of conical picks with abrasion-resistant coatings in laboratory conditions

Krauze, K.; Bołoz, Łukasz; Wydro, Tomasz; Mucha, Kamil

doi:10.1088/1757-899x/679/1/012012

Cited by 7 publications

(4 citation statements)

References 8 publications

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“…A cross sectional image can be seen in Figure 5. This material is intended to be used in applications, where the parts are subjected to heavy loads and severe abrasion, such as conical picks [32], excavator buckets [33], augers and drills [34,35], etc. The chemical composition of the cored wire, supplied by the manufacturer, is available in Table 2 The filler metal chosen for this experiment was a Ф 1.6 mm metal cored, gas-shielded hardfacing wire named Endotec DO*611x, manufactured by Castolin Eutectic (Menomonee Falls, WI, USA).…”

Section: Base and Filler Materials Chemical Compositionmentioning

confidence: 99%

Section: Base and Filler Materials Chemical Compositionmentioning

confidence: 99%

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On the Influence of Heat Input on Ni-WC GMAW Hardfaced Coating Properties

et al. 2023

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Hardfacing is one of the techniques used for part lifecycle elongation. Despite being used for over 100 years, there still is much to discover, as modern metallurgy provides more and more sophisticated alloys, which then have to be studied to find the best technological parameters in order to fully utilize complex material properties. One of the most efficient and versatile hardfacing approaches is Gas Metal Arc Welding technology (GMAW) and its cored-wire equivalent, known as FCAW (Flux-Cored/Cored Arc Welding). In this paper, the authors study the influence of heat input on the geometrical properties and hardness of stringer weld beads fabricated from cored wire consisting of macrocrystalline tungsten carbides in a nickel matrix. The aim is to establish a set of parameters which allow to manufacture wear-resistant overlays with high deposition rates, preserving all possible benefits of this heterogenic material. This study shows, that for a given diameter of the Ni-WC wire, there exists an upper limit of heat input beyond which the tungsten carbide crystals may exhibit undesired segregation at the root.

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Section: Base and Filler Materials Chemical Compositionmentioning

confidence: 99%

Section: Base and Filler Materials Chemical Compositionmentioning

confidence: 99%

On the Influence of Heat Input on Ni-WC GMAW Hardfaced Coating Properties

et al. 2023

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“…It is applied not only for manual drilling but also in the case of drilling rigs.. Every rock mining process results in the wear of tools, which increases the energy consumption of the process and reduces the efficiency. Mining tools' durability, rock abrasiveness and cutting forces are the subject of many studies (Bołoz and Midor, 2019;Krauze et al, 2019;Kahraman et al, 2018;Hamzaban et al, 2023;Biały, 2015;Krauze et al, 2015;Bołoz, 2020). In the case of currently used tools for rotary drilling, the impact of the type and degree of wear on the cutting resistance has not been investigated.…”

Section: Literature Reviewmentioning

confidence: 99%

Influence of the drill bit tip geometry on the rotary drilling process performed with a hand-held hydraulic drill

Bołoz

2023

Production Engineering Archives

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In the mining and construction industries, hand drills are used to carry out many processes related to excavation and auxiliary works. Hand drilling is commonly applied for making small diameter holes, especially in hard-to-reach places. In the case of manual drilling, an important parameter is drilling resistance, especially torque. Drilling tools are subject to wear, which has a negative impact on the process of drilling, including resistance and efficiency. A blunt tool lowers the drilling speed and puts more strain on the operator. The article presents the results of laboratory tests of selected parameters of the drilling process carried out with a hydraulic rotary drill. The tests were performed with the use of new drill bits as well as drills characterized by a various degree of wear. The tests were carried out for popular, frequently applied rotary drilling tools, on a unique laboratory stand that enabled setting the feed force and measuring the torque, rotational speed, drilling path, drilling speed as well as the in and out pressure of the drill. A number of characteristics were determined as a function of time and depth of the drilled hole. It was found that tool blunting affects the drilling process in various ways, whereas the intensity of this influence is determined by the type of blunting. The test results can provide a basis for developing a criterion for replacing a drill bit with a new one.

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“…In this paper, the authors focus on the geometrical properties and hardness of chromium-based cored wires utilized in GMAW welding approach. This kind of materials can be used in coating of machine parts, which are subjected to an abrasive working environment, such as drilling heads or tangential rotary picks in the mining industry [ 41 , 42 ], as seen in the example presented in Figure 2 . The process of coating such mining tools relies on the combination of a conventional GMAW technique and the WAAM approach, since it requires relatively narrow geometrical tolerances resulting from numerically controlled indexed contour hardfacing [ 43 ].…”

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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Investigations into the wear rate of conical picks with abrasion-resistant coatings in laboratory conditions

Cited by 7 publications

References 8 publications

On the Influence of Heat Input on Ni-WC GMAW Hardfaced Coating Properties

On the Influence of Heat Input on Ni-WC GMAW Hardfaced Coating Properties

Influence of the drill bit tip geometry on the rotary drilling process performed with a hand-held hydraulic drill

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

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