A Preliminary Machinability Study of Flake and Compacted Graphite Irons with Multilayer Coated and Uncoated Carbide Inserts

Tooptong, Sirisak; Park, Kyung Hee; Lee, Seok Woo; Kwon, Patrick

doi:10.1016/j.promfg.2016.08.053

Cited by 10 publications

(4 citation statements)

References 10 publications

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“…The cutting tools have a multilayer coated carbide of Ti(CN) and Al 2 O 3 as exterior coating and an additional thin TiN coating. The parameters set were V c = 250 m/min, f n = 0.2 mm/rev, and a P = 2 mm, and the results of the configuration were a few chippings and a more extensive flank and crater wear [28]. The relation between the flank-wear decreasing when cutting speed is above 900 m/min was studied, and the behavior was explained with a CBN cutting tool.…”

Section: Review Of Wear Mechanism In a Grey Cast Iron Machining Processmentioning

confidence: 99%

An Evaluation of the Tool Wear of Ceramic and Coated Carbide Inserts in Finishing Turning under the Influence of Age-Strengthening Gray Cast Iron

González-Sierra,

Flores Méndez,

Meraz-Melo

et al. 2023

Applied Sciences

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Gray cast iron (GCI) is a common material in the automotive industry due to its mechanical characteristics, which change primarily for materials employed for the foundry and cooling rate of material. According to the workpiece, the material of the cutting tool and cutting parameters are analyzed to improve the machining and to increment the lifetime of the tools. In this research, the foundry and machining process of an automotive component using ceramic and coated carbide tools were the study case, and the effect that they have on the age strengthening of GCI on the tool wear of the cutting tools was studied. Both inserts have the capability to machine the material with a rough surface between 1.5 to 2.0 μm. The wear mechanism of inserts and the microstructure of GCI were characterized with microscopy techniques, atomic force microscope (AFM), and energy dispersive X-ray spectroscopy (EDS). The microstructure of the workpiece shows a casting with flake graphite morphology that is linked with the induction of microcracks in the material. The experimental analysis shows that the GCI with 12 days of aging has an increased tensile strength. This improves the tool life of ceramic and coated carbide tools. There is a 50% reduction in flank wear with inserts that are machined with the GCI within five days of aging, compared with the material within twelve days. The rake face and flank wear show that abrasive and adhesive wear are the main mechanisms of ceramic inserts due to the high cutting speed. Meanwhile, adhesive and oxidative wear in the flank were the predominant type of wear for coated carbide tools.

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Section: Review Of Wear Mechanism In a Grey Cast Iron Machining Processmentioning

confidence: 99%

An Evaluation of the Tool Wear of Ceramic and Coated Carbide Inserts in Finishing Turning under the Influence of Age-Strengthening Gray Cast Iron

González-Sierra,

Flores Méndez,

Meraz-Melo

et al. 2023

Applied Sciences

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“…In the current production processes, tool coating is widely used, which can effectively improve the hardness and strength of the tool, in addition to improving the heat resistance and wear resistance of the tool so as to improve its service life. Tooptong S [ 21 ] conducted turning tests on uncoated carbide tools and multicoated carbide tools. In their tests, they found that the tool life of coated cutting tool inserts was much longer than that of uncoated cutting tool inserts.…”

Section: Introductionmentioning

confidence: 99%

Effect of Tool Coatings on Machining Properties of Compacted Graphite Iron

Tan

et al. 2022

Micromachines

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Compacted graphite iron (CGI) has become the most ideal material for automotive engine manufacturing owing to its excellent mechanical properties. However, tools are severely worn during processing, considerably shortening their lifespan. In this study, we prepared a series of cemented carbide-coated tools and evaluated their coating properties in cutting tests. Among all tested coatings, PVD coating made of AlCrN (AC) presented with the best surface integrity and mechanical properties, achieving the best comprehensive performance in the coating test. The AC-coated tool also exhibited the best cutting performance at a low speed of 120 m/min, corresponding to a 60% longer cutting life and the lowest workpiece surface roughness relative to other coated tools. In the cutting test at a high speed of 350 m/min, the CVD double-layer coated tool (MT) with a TiCN inner layer of and an Al2O3 outer layer had a 70% longer cutting life and the lowest workpiece surface roughness relative to other coated tools.

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“…Compacted graphite iron (CGI) is considered to be one of the most promising material and have an increasing demand in both automotive and locomotive industries due to its unique physical and mechanical properties. Since it can advantageously replace gray cast iron (GCI) and some aluminum alloys in the fabrication of diesel engines because of its higher strength-to-weigh and stiffness-to-weigh ratio and some specific characteristics, such as intermediate thermal conductivity, higher modulus of elasticity, and superior crack initiation and propagation resistances compared to gray cast iron(GCI),as well as higher thermal conductivity and superior thermal distortion resistance compared to nodular graphite iron(NGI) [1,2]. Cemented carbides tools have been widely applied for cutting compacted graphite iron because of their high hardness and outstanding wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Study of Double-Edged Gun Drills with Different Edge Types in Drilling Compacted Graphite Iron

Chen

Shi

et al. 2020

KEM

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Deep-hole machining is an important part in the field of mechanical processing of diesel engine. Gun drill has been widely used in deep-hole machining because of its high dimensional accuracy, high efficiency and good straightness. Through experiments on drilling compacted graphite iron with two different edge types of double-edged gun drills, the spindle power, axial force and tool wear were analyzed and found out one edge type which is more suitable for processing compacted graphite iron. This paper presents a simulation of deep hole drilling to validate the analysis. The research results have important guiding significance for deep hole processing of compacted graphite iron.

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A Preliminary Machinability Study of Flake and Compacted Graphite Irons with Multilayer Coated and Uncoated Carbide Inserts

Cited by 10 publications

References 10 publications

An Evaluation of the Tool Wear of Ceramic and Coated Carbide Inserts in Finishing Turning under the Influence of Age-Strengthening Gray Cast Iron

An Evaluation of the Tool Wear of Ceramic and Coated Carbide Inserts in Finishing Turning under the Influence of Age-Strengthening Gray Cast Iron

Effect of Tool Coatings on Machining Properties of Compacted Graphite Iron

Study of Double-Edged Gun Drills with Different Edge Types in Drilling Compacted Graphite Iron

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