Influence of Plating Conditions on Cutting Performance of cBN Coated Cemented Carbide End-mill(Advanced machining technology (continued))

The nickel-based superalloy GH4033 is one of the difficult-to-cut materials. In order to investigate the machinability of GH4033, the tool cutting performance, tool failure modes, tool life and the relationships between surface roughness and tool flank wear were studied by using different coated cemented carbide cutting tools under dry cutting. Aiming at the amount of metal removal combining with the tool life and surface quality, the better cutting tool coating type and optimal cutting parameters were obtained through the orthogonal experiments. The results showed that the cutting performance of TiCN coated tool (GC4235) was better than that of TiAlN coated tool (JC450V). With these two kinds of tools, the machined surface roughness decreased to a minimum value and then increased with the increase of flank wear. When cutting GH4033, the main wear mechanism for both of the two types of tools included adhesive wear, diffusive wear, abrasive wear, edge wear and coating peeling.

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Effect of Boron Concentration on Adhesion and Cutting Performance of Diamond-Coated Cemented Carbide Tools

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.375-376.138 ◽

2008 ◽

Vol 375-376 ◽

pp. 138-142 ◽

Cited By ~ 5

Author(s):

Cheng Zhi Yao ◽

Fang Hong Sun ◽

Zhi Ming Zhang ◽

Ming Chen

Keyword(s):

Surface Morphology ◽

Adhesive Strength ◽

Boron Concentration ◽

Diamond Films ◽

Indentation Test ◽

Cutting Performance ◽

Cemented Carbide ◽

Average Grain Size ◽

Cemented Carbide Tools ◽

Coated Cemented Carbide

Diamond thin films doped with various boron concentrations were grown on WC-Co cemented carbide tools by hot-filament-assisted chemical vapor deposition (HFCVD). The trimethyl borate dissolved in acetone solution was used as the boron resource (B/C=0%, 0.1%, 0.3%, 0.5%). The surface morphology of diamond films with different boron contents was investigated by Scanning electron microscopy, the adhesive strength was calculated by means of indentation test under a load of 1500N. A real cutting performance was carried out on Al metal matrix composites material (20vol%SiC, 15μm), and the insert flank wear was examined by measuring the scars that appeared on the cutting edge with tool microscope. The research results shown the surface morphology and structure of the diamond films changed owing to boron doping. As the doping levels increased, the average grain size of the films decreased from 10 to 2μm. A significant improvement in adhesion and cutting performance were observed as the boron contents increased from 0% to 0.5%. The adhesion and cutting performance were best when the boron concentration was 0.3%. Adequate boron can effectively suppress the cobalt diffusion to the substrate surface and avoid the catalytic effect of cobalt at the high temperature. It is of great significance for improvement of the adhesive strength and cutting performance of diamond-coated tools using above method.

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Prozesskettenoptimierung in der Fräserfertigung/Process chain optimization in end mill production

wt Werkstattstechnik online ◽

10.37544/1436-4980-2020-11-12-64 ◽

2020 ◽

Vol 110 (11-12) ◽

pp. 800-805

Author(s):

Thomas Bergs ◽

Timm Grünebaum ◽

Antonia Splettstößer ◽

Alexander Beckers ◽

Sebastian Barth

Keyword(s):

Knowledge Base ◽

High Performance ◽

Cemented Carbide ◽

Process Chain ◽

End Mill ◽

External Zone ◽

End Mills ◽

Coated Cemented Carbide

Die Auswirkungen der fertigungsbedingten Oberflächen- und Randzoneneigenschaften von Fräswerkzeugen auf ihr Einsatzverhalten sind wenig erforscht. Zudem sind die Wechselwirkungen entlang der Prozesskette zur Herstellung dieser Werkzeuge unzureichend bekannt. Durch die Erforschung der Entstehung der fertigungsbedingten Oberflächen- und Randzoneneigenschaften von beschichteten Vollhartmetallfräsern entlang der Prozesskette sowie ihres Einflusses auf das Funktionsverhalten soll eine Wissensbasis zur Optimierung von Hochleistungsfräsern geschaffen werden. In diesem Beitrag wird ein entsprechendes Forschungsprojekt vorgestellt. The effects of the manufacturing-related surface and external zone characteristics of end mills on their cutting behaviour are little known. In addition, the interactions along the process chain for manufacturing these tools are insufficiently known. By investigating the generation of the manufacturing-related surface and external zone characteristics of coated cemented carbide end mills along the process chain and their influence on the functional behaviour, a knowledge base for the optimisation of high-performance end mills shall be created.

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