Effect of Powder Pretreatment on the Wear of Ultrafine Cemented Carbide Cutting Inserts

2013 ◽  
Vol 395-396 ◽  
pp. 792-796
Author(s):  
Jian Bing Cheng ◽  
Si Qin Pang ◽  
Xi Bin Wang ◽  
Qi Xun Yu
Keyword(s):  
Energy Dispersive Spectrometry ◽  
Adhesive Wear ◽  
Low Pressure ◽  
Cemented Carbide ◽  
Surface Wear ◽  
Oxidative Wear ◽  
Life Test ◽  
Cutting Inserts ◽  
Stereo Microscope ◽  
Flank Surface

Ultrafine WC-Co cemented carbide cutting inserts were prepared by <em>direct low pressure sintering and low pressure sintering after the </em><em>powder pre</em><em>treatment, tool life test</em><em>s</em><em> of continuous cutting superalloy GH2132 were carried out, respectively</em><em>.</em> ZEISS continuous zoom stereo microscope and microphotograph system were used to observe flank surface wear morphology of the cutting inserts, <em>and analysis the topography and elements of central wear region of flank </em><em>sur</em><em>face </em><em>by</em><em> </em><em>X</em><em>-ray </em>energy dispersive spectrometry<em> and scanning electron microscope. </em>The results show that <em>the main wear mechanism of ultrafine </em>cemented carbide<em> cutting </em><em>insert</em><em>s is </em><em>adhesive wear, </em>and the wear resistance of <em>ultrafine </em>cemented carbide<em> cutting </em><em>insert</em><em>s that low pressure sintering after </em><em>powder</em><em> </em><em>pre</em><em>treatment</em> is <em>superior to direct sintering, </em><em>powder </em>pretreatment helps increase the resistance of abrasive wear, adhesive wear and oxidative wear as well as diffusive wear of cutting inserts.

Effect of Grain Growth Inhibitor on the Wear of Ultrafine Cemented Carbide Cutting Inserts

2013 ◽  
Vol 423-426 ◽  
pp. 720-724
Author(s):  
Jian Bing Cheng ◽  
Si Qin Pang ◽  
Xi Bin Wang ◽  
Qi Xun Yu
Keyword(s):  
Grain Growth ◽  
Energy Dispersive Spectrometry ◽  
Adhesive Wear ◽  
Growth Inhibitor ◽  
Cemented Carbide ◽  
Grain Growth Inhibitor ◽  
Life Tests ◽  
Cutting Inserts ◽  
Stereo Microscope ◽  
Flank Surface

By using the method of low pressure sintering, both of adding and not adding grain growth inhibitor of WC-Co ultra-fine cemented carbide cutting inserts were prepared, tool life tests of continuous cutting superalloy GH2132 were carried out, respectively. ZEISS continuous zoom stereo microscope and microphotograph system were used to observe flank surface wear morphology of the cutting inserts, and analysis the topography and elements of central wear region of flank surface by X-ray energy dispersive spectrometry and scanning electron microscope. The results show that the main wear mechanism of ultrafine cemented carbide cutting inserts is adhesive wear, and the wear resistance of ultrafine cemented carbide cutting inserts that added grain growth inhibitor is superior to no grain growth inhibitor, adding grain growth inhibitor helps increase the resistance of abrasive wear, adhesive wear and oxidative wear as well as diffusive wear of cutting inserts).

Effect of Grain Refinement and Composition on the Wear of Cemented Carbide Cutting Tools

2013 ◽  
Vol 456 ◽  
pp. 507-511
Author(s):  
Jian Bing Cheng ◽  
Si Qin Pang ◽  
Xi Bin Wang ◽  
Qi Xun Yu
Keyword(s):  
Grain Size ◽  
Grain Refinement ◽  
Tool Life ◽  
Cutting Tools ◽  
Cobalt Content ◽  
Cemented Carbide ◽  
Cutting Inserts ◽  
Stereo Microscope ◽  
Different Grain Size ◽  
Flank Surface

Tool life tests of continuous cutting superalloy GH2132 were carried out by WC/Co cemented carbide cutting inserts of different grain size and cobalt content, and flank surface wear morphology of the cutting inserts were observed by ZEISS continuous zoom stereo microscope and microphotograph system. The results show that grain size and cobalt content strongly influence the cutting tool life and tool wear, grain refinement and proper cobalt content are help to improve the tool life and the wear resistance of WC/Co cemented carbide. The wear mechanisms of different grain size and cobalt content of ultrafine cemented carbide tools were adhesion and notch, among them, adhesive was the main wear mechanism at higher cutting speeds.

Influence of Neodymium on Wear Resistance of Hypereutectic Al-Si Alloy

2015 ◽  
Vol 1095 ◽  
pp. 135-139
Author(s):  
Wei Xi Shi ◽  
Cheng Wu Du ◽  
Gui Mao Li ◽  
Zhi Ming Liu
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
Wear Mechanism ◽  
Friction And Wear ◽  
Adhesive Wear ◽  
Primary Silicon ◽  
Oxidative Wear ◽  
Initial Sample ◽  
Unmodified Alloy ◽  
Resistance Tests

The morphology of eutectic and primary silicon phases was analyzed by OM and SEM. OM and SEM results show that pure Nd can significantly refine both eutectic and primary silicon of hypereutectic Al-20%Si alloy. Morphology of primary silicon is transformed from star-shaped and irregular morphology to fine polyhedral and grain size of primary silicon is refined from 80~120 μm to 20~50 μm. Friction and wear resistance tests show that friction coefficient of Al-20%Si alloy reduces after Nd modification. Wear resistance of Al-20%Si alloy after modification is significantly improved as compared to the initial sample. The dominant wear mechanism for 0.3% Nd modified alloy is abrasive wear, adhesive wear and oxidative wear mechanism, but wear mechanism for unmodified alloy is abrasive wear and adhesive wear mechanism.

Analysis of Sound Signal Generation Due to Flank Wear in Turning

2002 ◽  
Vol 124 (4) ◽  
pp. 799-808 ◽  
Author(s):  
Ming-Chyuan Lu ◽  
Elijah Kannatey-Asibu,
Keyword(s):  
Tool Wear ◽  
Flank Wear ◽  
Adhesive Wear ◽  
Cutting Process ◽  
Signal Generation ◽  
Asperity Height ◽  
Monitoring Tool ◽  
Main Effect ◽  
Audible Sound ◽  
Flank Surface

A new concept is introduced to model the main effect of tool wear on system dynamics during stable cutting. Audible sound generated from the cutting process is analyzed as a source for monitoring tool wear during turning, assuming adhesive wear as the predominant wear mechanism. The analysis incorporates the dynamics of the cutting process. In modeling the interaction on the flank surface, the asperities on the surfaces are represented as a trapezoidal series function with normal distribution. The effect of changing asperity height, size, spacing, and the stiffness of the asperity interaction is investigated and compared with experimental data.

scholarly journals Influence of tool wear on the cutting torque and axial force in the milling of titanium alloy

Mechanik ◽  
2018 ◽  
Vol 91 (11) ◽  
pp. 1016-1018
Author(s):  
Kazimierz Zaleski ◽  
Andrzej Zyśko ◽  
Jakub Matuszak
Keyword(s):  
Titanium Alloy ◽  
Tool Wear ◽  
Axial Force ◽  
Cutting Speed ◽  
Ti6al4v Titanium Alloy ◽  
Cutting Inserts ◽  
Flank Surface

The results of the survey on the influence of tool wear on the cutting torque and axial force in the milling of Ti6Al4V titanium alloy are presented. The tests were carried out by selecting cutting inserts with different degree of wear. The influence of the wear value on the flank surface and the cutting speed on the value of axial force and cutting torque is visible.

scholarly journals Effect of Micro-Textured Surfaces and Sliding Speed on the Lubrication Mechanism and Friction-Wear Characteristics of CF/PEEK Rubbing against 316L Stainless Steel under Seawater Lubrication

2021 ◽  
Vol 11 (21) ◽  
pp. 9915
Author(s):  
Yingna Liang ◽  
Jianxin Gao ◽  
Dianrong Gao ◽  
Yanan Sun ◽  
Zongyi Zhang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Adhesive Wear ◽  
Friction Pair ◽  
Surface Friction ◽  
Contact Temperature ◽  
Oxidative Wear ◽  
Lubrication Mechanism ◽  
Sliding Speed ◽  
Wear Characteristics

In this work, the lubrication mechanism and friction-wear characteristics of the friction pair between carbon-fiber-reinforced polyether ether ketone (CF/PPEK) and 316L stainless steel with a micro-hemispherical pit textured surface at different sliding speeds under seawater lubrication were studied through numerical simulation and experimental investigation. The study results indicate that the seawater moves following the sliding direction of the upper specimen, forms a vortex ring flow in the hemispherical pit of the bottom specimen, uses the convergent gap to generate a hydrodynamic effect, produces the bearing capacity, and realizes fluid lubrication. The hemispherical pit diminishes the abrasive wear during the friction process by storing the wear debris, and the main wear forms of the hemispherical-pit surface friction pair are oxidative wear and adhesive wear. The friction coefficient of the hemispherical-pit surface friction pair is 0.018–0.027, the specimen contact temperature is 40.2–55.1 °C, and it is always in the hydrodynamic lubrication state in a rotation speed ranging from 1000 r/min to 1750 r/min. As the sliding speed increases, the specimen contact temperature climbs, and the oxidation reaction gradually becomes full. Oxidative wear and adhesive wear alternately play a dominant role in the friction, and the wear rate first decreases and then increases sharply.

Influence of Ar ion etching on the surface topography of cemented carbide cutting inserts

2017 ◽  
Vol 69 ◽  
pp. 234-239 ◽  
Author(s):  
Martina Gassner ◽  
Nina Schalk ◽  
Bernhard Sartory ◽  
Markus Pohler ◽  
Christoph Czettl ◽  
...  
Keyword(s):  
Surface Topography ◽  
Cemented Carbide ◽  
Ion Etching ◽  
Cutting Inserts
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