Study on machinability of a stellite alloy with uncoated and coated carbide tools in turning

Shao, Hua; Li, Lin; Liu, L. J.; Zhang, S. Z.

doi:10.1016/j.jmapro.2013.10.001

Cited by 39 publications

(19 citation statements)

References 13 publications

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“…10b and Table 9). It must be highlighted that in previous research (Ref 11), a high quantity of Cr element was also observed in the tool wear area, where diffusion wear occurred on the rake and the flank faces of the tool when turning Stellite 12 alloy. Unexpectedly, the proof of the diffusion of Fe of the workpiece into the tool was not found in this study as well as in ShaoÕs study (Ref 11).…”

Section: Tool Wear and The Mechanismsmentioning

confidence: 73%

Influence of Cutting Parameters and Tool Wear on the Surface Integrity of Cobalt-Based Stellite 6 Alloy When Machined Under a Dry Cutting Environment

Ying-fei

Escalona

Galloway

2016

J. of Materi Eng and Perform

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The efficiency of a machining process can be measured by evaluating the quality of the machined surface and the tool wear rate. The research reported herein is mainly focused on the effect of cutting parameters and tool wear on the machined surface defects, surface roughness, deformation layer and residual stresses when dry milling Stellite 6, deposited by overlay on a carbon steel surface. The results showed that under the selected cutting conditions, abrasion, diffusion, peeling, chipping and breakage were the main tool wear mechanisms presented. Also the feed rate was the primary factor affecting the tool wear with an influence of 83%. With regard to the influence of cutting parameters on the surface roughness, the primary factors were feed rate and cutting speed with 57 and 38%, respectively. In addition, in general, as tool wear increased, the surface roughness increased and the deformation layer was found to be influenced more by the cutting parameters rather than the tool wear. Compressive residual stresses were observed in the un-machined surface, and when machining longer than 5 min, residual stress changed 100% from compression to tension. Finally, results showed that micro-crack initiation was the main mechanism for chip formation.

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Section: Tool Wear and The Mechanismsmentioning

confidence: 73%

Influence of Cutting Parameters and Tool Wear on the Surface Integrity of Cobalt-Based Stellite 6 Alloy When Machined Under a Dry Cutting Environment

Ying-fei

Escalona

Galloway

2016

J. of Materi Eng and Perform

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“…The intensity of occurrence and the size of the observed defects on the surface increased with increasing feed value- Figure 8. The presence of extensive and deep surface defects causes a significant increase in the values of GPS indicators, which can be caused on the one hand by the porosity of the material (removal of the material layer reveals the free spaces hidden under it), and on the other by the occurrence of significant friction forces and an increase in temperature between the surface of the tool and the workpiece subjected to plastic deformations [10,13,25]. It has also been observed that surface defects and some porosity of samples after SLM-that are exposed during cutting-are also partly rolled (Figure 7a).…”

Section: Measurements Of Gps Parametersmentioning

confidence: 99%

Evaluation of Surface Topography after Face Turning of CoCr Alloys Fabricated by Casting and Selective Laser Melting

et al. 2020

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The machinability of hard-to-cut CoCr alloys manufactured by Selective Laser Melting (SLM) technology is not yet sufficiently studied. Therefore, this work focuses on evaluation of surface texture formation during face turning of CoCr alloy. As part of the research, two specimen types were subject to comparison: made with the application of conventional casting and manufactured by additive manufacturing—SLM. A number of analytical and experimental methods were employed to describe the specimen composition and morphology, as: X-Ray Diffraction Analysis (XRD), optical metallurgical microscopy, confocal optical microscopy, and Vickers hardness HV0.1 measurements. In the next stage, the measurements of surface topographies formed during turning in a range of variable cutting speeds and feeds were carried out. Ultimately the multi-factor MANOVA (Multivariate Analysis of Variance) illustrating the influence of manufacturing technology, cutting speed, and feed ratio on selected surface parameters of samples was made. It has been demonstrated that during face turning with feeds up to 0.15 mm/rev, the similar values of surface roughness height and material ratio curve parameters were reached for both tested CoCr alloys. However, in a range of higher feed values, the surface quality of CoCr samples fabricated by SLM was lower than that reached for CoCr after casting process.

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“…To verify the actual procedure, we selected the results published in [7] and [10]. The reason for this selection is similar to the concept and objectives pursued by the experiments.…”

Section: Comparison and Verificationmentioning

confidence: 99%

“…For comparison we chose also a work published by [7] because of the lack of published data on this topic. They studied the effect of various combinations of these parameters on the machining performance such as surface roughness, cutting force, cutting power and material removal rate.…”

Section: Comparison and Verification For Carbide Alloy Wc-comentioning

confidence: 99%

Prediction of Cutting Parameters of HVOF-Sprayed Stellite 6

et al. 2020

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In this research, the authors set out to propose a new method of predicting and adjusting the main cutting parameters of chip machining, namely spraying on the substrate. In the experiments, a total of 28 turning cuts on a Stellite 6 coating layer were realized. The base materials of the Stellite 6 layers were EN S235JRG1 and carbide WC-Co. This work aimed to find out and optimize the influence of different combinations of cutting parameters. Due to the coating solution, the work is focused on the evaluation of the roughness Ra (μm) of the turned substrate, the grain size Dgr (μm) of the spraying, the normal stress σrz (MPa), the residual stress σrez (MPa), the specific cutting force Fc (N), the quality of adhesion to the substrate Adhmp (MPa) and other parameters. For the sake of a comprehensive solution to the problem, several new predictive equations and subsequent suggestions for solutions have been derived from this research topic based on the newly obtained experimental results. The proposed models and procedures make it possible to get new results and insights into coating technologies.

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Study on machinability of a stellite alloy with uncoated and coated carbide tools in turning

Cited by 39 publications

References 13 publications

Influence of Cutting Parameters and Tool Wear on the Surface Integrity of Cobalt-Based Stellite 6 Alloy When Machined Under a Dry Cutting Environment

Influence of Cutting Parameters and Tool Wear on the Surface Integrity of Cobalt-Based Stellite 6 Alloy When Machined Under a Dry Cutting Environment

Evaluation of Surface Topography after Face Turning of CoCr Alloys Fabricated by Casting and Selective Laser Melting

Prediction of Cutting Parameters of HVOF-Sprayed Stellite 6

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