KT5331AS0 and 45 Steel Milling Comparison of Surface Characteristics

2011 ◽  
Vol 66-68 ◽  
pp. 2062-2068
Author(s):  
Jian Sheng Ding ◽  
Yang Ping Xu
Keyword(s):  
Mass Fraction ◽  
High Speed ◽  
Steel Surface ◽  
Surface Composition ◽  
Surface Hardness ◽  
Surface Oxidation ◽  
Surface Characteristics ◽  
Cutting Parameters ◽  
Machined Surface ◽  
Cooling Conditions

To study the surface composition, hardness, microstructure of the machined surface in KT5331AS0 and 45 steel at different cutting parameters and cooling conditions. The results show that: in the cutting process the mass fraction of W in KT5331AS0 steel surface were reduced to varying degrees, the basic chemical composition of 45 steel surface did not change; When KT5331AS0 steel in the high-speed, higher feed rate, it will be cause surface hardness increasing, however the hardness of 45 steel have no regular variation; 45 steel will have greater depth of the torn surface after milling, tearing a wider range, more obvious surface oxidation.

Influence of Inclination Angle on Machined Surface Hardness in High Speed Ball End Milling

2012 ◽  
Vol 500 ◽  
pp. 134-139
Author(s):  
Shi Guo Han ◽  
Jun Zhao ◽  
Xiao Xiao Chen ◽  
Yue En Li ◽  
Qing Yuan Cao ◽  
...  
Keyword(s):  
Inclination Angle ◽  
Cutting Forces ◽  
High Speed ◽  
End Milling ◽  
High Surface ◽  
Surface Hardness ◽  
Cutting Parameters ◽  
Machined Surface ◽  
Abrasive Resistance ◽  
Feed Direction

In this paper, the effects of the variational combinations of cutter inclination angle in feed direction and the feed per tooth on the machined surface hardness were mainly concerned. The cutting forces transformed from the measured cutting forces in OXYZ and the SEM microstructures of the surface layer were analyzed to explore the generation condition of the hardness. Variations of the surface hardness are not apparent with the increment of feed per tooth with the identical other cutting parameters. Inclination angles in feed direction of approximately ranging from 10° to 15° and from 25° to 30°, which correspond to high surface hardness, are suggested to be applied in cutting process when high abrasive resistance is expected. While values of inclination angle approximately equal to 0° and 45° are prior to be chosen when high shock resistance performance is firstly expected. Optimization of the cutting parameters, which could offer guidance to the machining of sculptured surface concerning cutter inclination angle, was presented.

Experimental Study on Wear-Resistance of Machined Surface in High Speed Milling Aviation Aluminum Alloy

2012 ◽  
Vol 500 ◽  
pp. 117-122
Author(s):  
Xiu Li Fu ◽  
Xiao Qin Wang ◽  
Yong Zhi Pan ◽  
Yang Qiao
Keyword(s):  
Wear Resistance ◽  
Aluminum Alloy ◽  
Friction Coefficient ◽  
Surface Quality ◽  
Feed Rate ◽  
High Speed ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Machined Surface ◽  
Resistance Performance

The wear-resistance performance of machined surface is an important factor in the evaluation of surface quality and precision in aerospace manufacturing industry. By using high-speed Ring-Block friction and wear machine (MRH-3), the influence of cutting parameters in milling aluminum alloy 7050-T7451 on wear-resistance of machined surface including friction coefficient and wear quantity are experimentally investigated. The wear-resistance is particularly sensitive to cutting speed and feed rate. The friction coefficient has marked drop trends as cutting speed increases. The influence of cutting speed on wear quantity is more complicated and the tendency of wear quantity was ascend in first and descend at last (v>900/min). The results show that the influence of cutting parameters on wear-resistance was also positively correlated with surface roughness and work-hardening of machined surface. The high work-hardening and surface quality had the promoting effecting on wear-resistance. The experiment and analysis results show that the machined surface by high speed cutting and lower feed rate has more superior in surface quality and wear-resistance performance comparing with conventional cutting speed.

The Study on Three-Dimensional Roughness of Machined Surface in High Speed Milling of SiCp/Al Composites

2011 ◽  
Vol 188 ◽  
pp. 179-183 ◽  
Author(s):  
Yang Jun Wang ◽  
M. Zhou ◽  
Y.H. Zhao
Keyword(s):  
Root Mean Square ◽  
Root Mean Square Deviation ◽  
High Speed ◽  
Three Dimensional ◽  
Roughness Parameter ◽  
Cutting Parameters ◽  
Mean Square ◽  
Mean Square Deviation ◽  
Machined Surface ◽  
High Speed Milling

For the purpose of investigating the effect on surface micro-topography of cutting parameters in high speed milling of SiCp/Al Composites, the high speed milling experiments were performed .The machined surface was measured by Taylor Hobson roughness tester and OLS3000 Confocal Laser Scanning Microscope. The acquired surface data was dealt with the three-dimensional roughness method. The three-dimensional root-mean-square deviation of the surface Sq and two-dimensional root-mean-square deviation Rq were compared. The effects of cutting parameters on three-dimensional roughness parameter were also investigated. The results showed that both feed rate and depth of cut have a little effect on the value of three-dimensional roughness parameter，and the cutting speed is the main affecting factor.

Influence Characteristics of Tool Vibration and Wear on Machined Surface Topography in High-Speed Milling

2014 ◽  
Vol 800-801 ◽  
pp. 585-589
Author(s):  
Bin Jiang ◽  
Guang Lei Cao ◽  
Ming Hui Zhang ◽  
Shou Zheng Sun ◽  
Xuan Chi Liu
Keyword(s):  
Tool Wear ◽  
Surface Topography ◽  
High Speed ◽  
Three Dimensional ◽  
Cutting Parameters ◽  
Three Dimensional Model ◽  
Machined Surface ◽  
Tool Vibration ◽  
Key Factor ◽  
Vibration Measuring

Existing research on machined surface topography, only consider its response to vibration or wear certain factors, both vibration and wear impact on machined surface topography exist ambiguity and uncertainty, it cannot solve the design conflicts of machined surface topography. For this, this paper analyzes blade installation error, tool wear, vibration and deformation to reveal effects of tip space trajectory, build a three-dimensional model of machined surface topography in simulation, extract its characteristic parameters, by simulation of different amplitudes and wear, found that axis amplitude is a key factor affecting surface residual height, flank wear affects contour distribution distance significantly, by specimen milling experiments, use vibration measuring instrument and ultra-depth microscopy to obtain vibration, wear characteristics and machined surface topography parameters under different cutting parameters, then use the gray system theory to get correlation analysis of the test data, results showed that the influence of tool wear on machined surface topography is prominent than tool vibration.

Experimental investigation of top burr formation in high-speed micro-milling of Ti6Al4V alloy

2019 ◽  
Vol 234 (4) ◽  
pp. 730-738 ◽  
Author(s):  
Mohan Kumar ◽  
Vivek Bajpai
Keyword(s):  
Experimental Investigation ◽  
High Speed ◽  
End Milling ◽  
Cutting Parameters ◽  
Ti6al4v Alloy ◽  
Micro Milling ◽  
Burr Formation ◽  
Machined Surface ◽  
Burr Width ◽  
Super Alloy

Miniaturization with superior quality product of super alloy is the demand of the industry. Ti6Al4V is the demanding super alloy due to its excellent material properties, although this super alloy is known for poor machinability in terms of burr formation, low tool life, and poor surface finish. Therefore, being a popular super alloy, it comes under the difficult-to-cut material. In the current work, burr formation on the machining of Ti6Al4V has been studied. Experimental investigation and characterizations of top burr formation on Ti6Al4V alloy using end milling process were carried out. A scanning electron microscopy identifies the burr formed on the machined surface. A new technique has been introduced to measure the top burr width (i.e. equivalent width) accurately. Equivalent burr width calculated as the ratio of total area of burr generated to the total height. It was observed that equivalent burr width in up milling was increased by 120%, while in down milling, it was decreased by 50% as the speed varies from conventional to high speed. Furthermore, the effects of different cutting parameters and tool parameters on top burr formation have been analyzed to establish correlation among them.

Study of High Co Superhard High Speed Steel Surface

2009 ◽  
Vol 610-613 ◽  
pp. 253-256
Author(s):  
Zhong Hou Li ◽  
Sha Sha Liu ◽  
Zhi Yong Cheng
Keyword(s):  
Surface Layer ◽  
High Speed ◽  
Steel Surface ◽  
High Surface ◽  
Surface Hardness ◽  
High Speed Steel ◽  
Low Alloy Steel ◽  
Surface Alloying ◽  
Plasma Surface ◽  
Plasma Surface Alloying

Cobalt- superhard high speed steel layer has been formed on the surface of low alloy steel 20Cr2V by tungsten-molybdenum-cobalt plasma surface alloying and following plasma carbonizing. After plasma surface alloying, a homogeneous and dense surface alloying layer was formed, thickness of which is 200μm. Composition, microstructure and properties of the alloying layer were investigated. Contents of W, Mo, Co, Cr, V and C in the surface layer reach 8%,5%, 6% ,4%,1.5% and 1.5% or so respectively. The concentrations of alloy elements basically meet the requirements of high cobalt type superhard high speed steel. Constituent phases of the surface layer were martensite, M7C3 ,M2C and Cr3C2 carbides and μ phase after quenching treatment. The advanced gradient superhard high speed steel possesses not only high surface hardness, high anti-temper softening ability but also enough toughness.

Research on Machined Surface Quality for High Speed Turning Titanium Alloy Membrane Discs and Optimization of Cutting Parameters

2010 ◽  
Vol 33 ◽  
pp. 246-250
Author(s):  
Wei Zhang ◽  
Min Li Zheng ◽  
Ming Ming Cheng ◽  
Wen Yong Shi
Keyword(s):  
Surface Roughness ◽  
Titanium Alloy ◽  
Empirical Model ◽  
High Speed ◽  
Cutting Parameters ◽  
Machined Surface ◽  
Cutting Parameter ◽  
High Speed Turning ◽  
Machined Surface Roughness ◽  
Cutting Parameter Optimization

By high speed turning experiment of aerospace engine titanium alloy membrane discs, it researches cutting parameters influence on machined surface roughness of titanium alloy membrane discs, meanwhile measures and analyzes machined surface topography. Machined surface roughness multi-linear regression empirical model of high speed end-surface turning titanium alloy membrane discs is established. Using cutting parameter combination obtained from cutting parameter optimization makes process verification experiment of high speed turning titanium alloy membrane discs. The results show that the established machined surface roughness empirical model of high speed turning titanium alloy membrane discs is credible in statistics, and the process verifying experiment effect is good by using optimized cutting parameters.

Experiment Research of Cutter Edge and Cutting Parameters Influence on Machined Surface Roughness for High Speed Milling Hardened Steel

2010 ◽  
Vol 136 ◽  
pp. 86-90 ◽  
Author(s):  
Wei Zhang ◽  
Min Li Zheng ◽  
Ming Ming Cheng ◽  
Quan Wan
Keyword(s):  
Surface Roughness ◽  
High Speed ◽  
End Milling ◽  
Cutting Parameters ◽  
Hardened Steel ◽  
Machined Surface ◽  
High Speed Milling ◽  
Ball End Milling ◽  
Edge Radius ◽  
Machined Surface Roughness

By using experiment cutter edge topography obtained by super depth three-dimension microscope, fits the cutter edge curve and calculate experiment cutter edge radius value; by high speed milling hardened steel experiment, individually researches cutter edge and cutting parameters influence on machined surface in high speed milling hardened steel with end-milling cutter and ball-end milling cutter. The experiment analysis results show that under the same cutting parameters condition, machined surface roughness in high speed end-milling cutter milling is better than in high speed ball-end milling; within experiment selected cutting parameter range, cutter edge radius is the main influence factor on machined surface roughness in high speed end- milling hardened steel, while the influence on machined surface roughness in high speed ball-end milling hardened steel is not obvious. In end-milling, when edge radius and milling depth are in the same order magnitude or the difference is not obvious, milling depth should be a little bigger than selected cutter edge radius value.

Heat and Temperatures in Machining: Effects and Significance

2012 ◽  
Vol 622-623 ◽  
pp. 1550-1553
Author(s):  
Rajesh Patil ◽  
Vilas Kalamkar ◽  
Hari Vasudevan
Keyword(s):  
Tool Wear ◽  
High Speed ◽  
Surface Characteristics ◽  
Contact Length ◽  
Machined Surface ◽  
Temperature Changes ◽  
Economic Problems ◽  
Highly Sensitive ◽  
Tool Wear Mechanisms ◽  
Finish Hard Turning

Heat generated in machining is significant to study, as number of technical and economic problems has root into it. The high temperatures on cutting tool needs better understanding of contact processes at tool-chip ,tool-workpiece interfaces. The contact length at tool-chip interface is significant to study as it governs the heat moving to the tool as well as many tribological conditions like stresses, tool wear. Understanding of Tool-workpiece interface is significant as it affects the heat moving to workpiece, tool, chip as well as tool flank wear and major machined surface characteristics. Non-sliding type tool wear mechanisms which are highly sensitive to temperature changes are important to study. The latest trends of using High Speed Machining, Dry and Near Dry Machining, Finish hard turning results in more heat generation demanding significant understanding of effect of heat generated and temperatures.

Identification of Subsurface Deformation in Machining of Inconel 718

2011 ◽  
Vol 117-119 ◽  
pp. 1681-1688 ◽  
Author(s):  
Jin Ming Zhou ◽  
Volodymr Bushlya ◽  
Ru Lin Peng ◽  
Jan Eric Stahl
Keyword(s):  
Tool Wear ◽  
Inconel 718 ◽  
High Speed ◽  
Strain Analysis ◽  
Cutting Parameters ◽  
Correct Prediction ◽  
Process Conditions ◽  
Machined Surface ◽  
Subsurface Deformation ◽  
Subsurface Region

There is considerable industrial significance to understand the nature of subsurface deformation under the machined surface for correct prediction of surface properties in machined components based upon the machined conditions and material behaviors that give rise to them. In this study, high speed machining of Inconel 718 was carried with whisker reinforced ceramic cutting tool under different conditions of tool wear, coolant state and cutting parameters. The objective of the present investigation was to determine the effect of both cutting parameters and tool wear on the plastic deformation in the subsurface region of Inconel 718 after the finishing machining with above process conditions. The surface and subsurface region of machined specimens were examined using a high resolution scan electron microscope (HRSEM) and EBSD technique, microhardness measurements were also conducted on the test samples, accordingly plastic strain analysis were carried out.

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