Investigating wear mechanisms of CBN and mixed-ceramic tools during finish hard turning of low-medium hardness AISI H11 steel

2011 ◽  
Vol 10 (1/2) ◽  
pp. 120
Author(s):  
J.S. Dureja ◽  
V.K. Gupta ◽  
Vishal S. Sharma ◽  
Manu Dogra
Keyword(s):  
Wear Mechanisms ◽  
Hard Turning ◽  
Ceramic Tools ◽  
Finish Hard Turning ◽  
Mixed Ceramic ◽  
Medium Hardness

Effect of Workpiece Hardness on Surface Microgeometry when Hard Turning with Ceramic Inserts

2013 ◽  
Vol 581 ◽  
pp. 176-181 ◽  
Author(s):  
Ildikó Maňková ◽  
Jozef Beňo ◽  
Marek Vrabel'
Keyword(s):  
Surface Roughness ◽  
Hard Turning ◽  
Surface Profile ◽  
Surface Finishing ◽  
Oxide Ceramic ◽  
Part Surface ◽  
Cutting Force Components ◽  
Finish Hard Turning ◽  
Force Components ◽  
Mixed Ceramic

Hard turning provides an alternative to grinding in some finishing operations. This paper deals with analysis of part surface finishing when turning hardened steel heat-treated on hardness of 46, 55 and 60 HRC with mixed oxide ceramic inserts. Average surface roughness Ra has been widely used in industry it is known that the single parameter Ra is inadequate to define the functionality of a surface. Two different surfaces with similar values of Ra can behave differently under loading conditions. The surface profile 2D and 3D parameters are assessed. The influence of workpiece hardness on surface roughness parameters and cutting force components is investigated. Results show that finish hard turning with mixed ceramic tool produces surface profile comparable to those produced by grinding.

Wear mechanisms of coated mixed-ceramic tools during finish hard turning of hot tool die steel

2009 ◽  
Vol 224 (1) ◽  
pp. 183-193 ◽  
Author(s):  
J S Dureja ◽  
V K Gupta ◽  
V S Sharma ◽  
M Dogra
Keyword(s):  
Feed Rate ◽  
Wear Mechanisms ◽  
Hard Turning ◽  
Flank Wear ◽  
Cutting Speed ◽  
Protective Layer ◽  
Depth Of Cut ◽  
Work Piece ◽  
Die Steel ◽  
Mixed Ceramic

The present study aims to investigate the wear mechanisms of a TiN-coated mixed ceramic tool prevalent under different machining conditions during hard turning of hot tool die steel. The different wear mechanisms observed are abrasion wear at low cutting speed, low feed rate, and highest work piece hardness; formation of protective layer and built-up edge (BUE) resulting from tribochemical reactions between constituents of tool and work piece material at moderate speed. High temperature accompanied by high cutting speed resulted in the removal of the protective layer and suppressed the BUE formation. Hard carbide particles of work material at a higher feed rate severely gouged the tool flank land. Chipping and brittle fractures were observed at very low and high depth of cut. Adhesion of work piece material followed by plastic deformation and notching was clearly visible at low work piece hardness. The influence of cutting speed, feed rate, depth of cut, and work piece hardness on the progressive tool flank wear, and flank wear rate (VBr-μm/km) in the steady wear region was also analysed.

Performance of coated and uncoated mixed ceramic tools in hard turning process

Measurement ◽  
2016 ◽  
Vol 82 ◽  
pp. 1-18 ◽  
Author(s):  
Hamza Bensouilah ◽  
Hamdi Aouici ◽  
Ikhlas Meddour ◽  
Mohamed Athmane Yallese ◽  
Tarek Mabrouki ◽  
...  
Keyword(s):  
Hard Turning ◽  
Turning Process ◽  
Ceramic Tools ◽  
Mixed Ceramic

Analysis on Finish Hard Turning of Ti-6.5Al-3.5Mo-1.5Zr-0.3Si Alloy

2009 ◽  
Vol 626-627 ◽  
pp. 225-230 ◽  
Author(s):  
Wei Wei Ming ◽  
Ming Chen ◽  
Bin Rong
Keyword(s):  
Corrosion Resistance ◽  
Elevated Temperature ◽  
Tool Wear ◽  
Hard Turning ◽  
Density Ratio ◽  
High Strength ◽  
Excellent Performance ◽  
Good Corrosion Resistance ◽  
Tool Wear Mechanism ◽  
Finish Hard Turning

Titanium alloys are extensively applied in aerospace, automotive, biomedical, and chemical industries owing to their excellent performance combining high strength-to-density ratio, good corrosion resistance, and high strength at elevated temperature. Ti-6.5Al-3.5Mo-1.5Zr-0.3Si (TC11) alloys are used to replace the most common Ti-6Al-4V in some important applications such as some parts in aerospace engine. The purpose of this paper is to evaluate the machinability of TC11 alloys in the finish hard turning conditions. The paper presents the machinability results of TC11 alloys compared with Ti-6Al-4V, and analyzes the variables such as cutting force, surface integrity, and tool wear mechanism in the experiments.

Wear mechanisms of Syalon ceramic tools when machining nickel-based materials

1983 ◽  
Vol 10 (1) ◽  
pp. 482-489 ◽  
Author(s):  
S. K. Bhattacharyya ◽  
A. Jawaid ◽  
M. H. Lewis ◽  
J. Wallbank
Keyword(s):  
Wear Mechanisms ◽  
Ceramic Tools

Effect of Cutting-Edge Geometry and Workpiece Hardness on Surface Residual Stresses in Finish Hard Turning of AISI 52100 Steel

1999 ◽  
Author(s):  
Jeffrey D. Thiele ◽  
Shreyes N. Melkote ◽  
Roberta A. Peascoe ◽  
Thomas R. Watkins
Keyword(s):  
Residual Stresses ◽  
Hard Turning ◽  
Cutting Edge ◽  
Phase Changes ◽  
Edge Geometry ◽  
Surface Residual Stresses ◽  
Aisi 52100 ◽  
High Feed ◽  
Aisi 52100 Steel ◽  
Finish Hard Turning

Abstract An experimental investigation was conducted to determine the effects of tool cutting-edge geometry and workpiece hardness on surface residual stresses for finish hard turning of through-hardened AISI 52100 steel. Polycrystalline cubic boron nitride (PCBN) inserts with representative types of edge geometry including “up-sharp” edges, edge hones, and chamfers, were used as the cutting tools in this study. This study shows that tool edge geometry is highly influential with respect to surface residual stresses, which were measured using x-ray diffraction. In general, compressive surface residual stresses in the axial and circumferential directions were generated by large edge hone tools, for longitudinal turning operations. Residual stresses in the axial and circumferential directions generated by small edge hone tools are typically more tensile than stresses produced by large edge hone tools. Microstructural analysis shows that thermal effects are significant at high feed rates, based on the presence of phase changes on the workpiece surface. At high feed rates, compressive stresses correlate with continuous white layers and tensile stresses correlate with over-tempered regions on the surface of the workpiece. Mechanical effects play a larger role at low feed rates, where phase changes are not observed to a significant degree. For these cases, large edge hone tools generally produce more compressive values of residual stress than small edge hone tools.

Wear mechanisms and effects of monolithic Sialon ceramic tools in side milling of superalloy FGH96

2020 ◽  
Vol 46 (17) ◽  
pp. 26813-26822
Author(s):  
Xianghui Huang ◽  
Fan Zou ◽  
Weiwei Ming ◽  
Jinyang Xu ◽  
Yun Chen ◽  
...  
Keyword(s):  
Wear Mechanisms ◽  
Side Milling ◽  
Ceramic Tools ◽  
Sialon Ceramic

scholarly journals An experimental study on the effect of tool geometry on tool wear and surface roughness in hard turning

2020 ◽  
Vol 12 (9) ◽  
pp. 168781402095988
Author(s):  
Pham Minh Duc ◽  
Le Hieu Giang ◽  
Mai Duc Dai ◽  
Do Tien Sy
Keyword(s):  
Surface Roughness ◽  
Tool Wear ◽  
Inclination Angle ◽  
Hard Turning ◽  
Rake Angle ◽  
Machining Process ◽  
Tool Geometry ◽  
Standard Tool ◽  
Inclination Angles ◽  
Mixed Ceramic

The main purpose of this study is to investigate the influence of tool geometry (cutting edge angle, rake angle, and inclination angle) and to optimize tool wear and surface roughness in hard turning of AISI 1055 (52HRC) hardened steel by using TiN coated mixed ceramic inserts. The results show that the inclination angle is the major factor affecting the tool wear and the surface roughness in hard turning. With the increase in negative rake and inclination angles, the tool wear decreases, and the surface roughness increases. However, the surface roughness will decrease when the inclination angle increases to overpass a certain limit. This is a new and significant point in the research of the hard turning process. From this result, the large negative inclination angle (λ = −10°) should be applied to reduce the surface roughness and the tool wear simultaneously. With the optimal cutting tool angles in the research, the hard machining process is improved remarkably with decreases of surface roughness and tool wear 8.3% and 41.3%, respectively in comparison with the standard tool angles. And the proposed tool-post design approach brings an effective method to change the tool insert angles using standard tool-holders to improve hard or other difficult-to-cut materials turning quality.

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