Research on Sticking Failure Characteristics of Cemented Carbide Blade

2012 ◽  
Vol 500 ◽  
pp. 211-217
Author(s):  
Zhe Li ◽  
Min Li Zheng ◽  
Xian Zhi Chen ◽  
Meng Tong
Keyword(s):  
Electron Microscopy ◽  
Cutting Tool ◽  
Influence Factors ◽  
Rake Face ◽  
Tool Breakage ◽  
Failure Characteristics ◽  
Micro Cracks ◽  
Cutting Zone ◽  
Element Density ◽  
Scanning Electron

Through the analysis on damaged tool in sticking failure experiment by cutting austenitic stainless steel (1Cr18Ni9Ti) with scanning electron microscopy (SME), found that there are micro cracks existent on rake face near the tip of the cutting tool, through the research of the emergence, development and distribution direction of the crack, the direct reason for tool breakage is the crack being out of control. Combining the study of cutting tool element density change in cutting zone and grooving wear on rake face, this paper analyzed the cause of the binding between chip and tool and the influence factors of sticking failure during the cutting process.

TiB2 Ceramic Tool Turning 45# Steel Experimental Study

2012 ◽  
Vol 476-478 ◽  
pp. 1067-1070
Author(s):  
Xiao Bin Zhang ◽  
Xia Chang ◽  
Fu Hui Han ◽  
Wei Jiu Huang
Keyword(s):  
Electron Microscopy ◽  
Experimental Study ◽  
Friction And Wear ◽  
Cutting Tool ◽  
Cutting Speed ◽  
Ceramic Tool ◽  
Ceramic Cutting Tool ◽  
Blade Tip ◽  
Flank Face ◽  
Scanning Electron

By using ordinary lathe, carried out cutting experimental study with cylindrical turning 45# steel on TiB2 ceramic cutting tool. By using Stereo Microscopy and Scanning Electron Microscopy, recorded cutting tool surface’s friction and wear conditions. The results showed that higher cutting speed could made surface roughness decrease and surface quality better; TiB2 ceramic cutting tool’s wear mechanism was abrasive wear, aoxidation wear; wear of blade tip and main flank face were more serious.

Study of the Localized Heating of Si Solar Cells by Thermal Imaging and Scanning Electron Microscopy

2013 ◽  
Vol 770 ◽  
pp. 157-160
Author(s):  
Buntoon Wiengmoon
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Solar Cells ◽  
Energy Dispersive Spectroscopy ◽  
Thermal Imaging ◽  
Hot Spots ◽  
Micro Cracks ◽  
Impurity Contamination ◽  
Localized Heating ◽  
Scanning Electron

The aim of this study was to investigate the localized solar cells heating by thermal imaging, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The electrical measurements and thermal infrared measurements were done on the commercial crystalline Si cells (10 cm x 10 cm). SEM was used for the observation of the localized heating. The I-V characteristics of all cells were quite similar with a small spread in the electrical parameters, while the IR images were different: some cells had quite uniform temperature profiles distribution and other ones showed the localized heating. The energy dispersive spectroscopy (EDS) analysis showed that some hot spots have high metal impurity contamination. The micro-structure investigation of hot spots revealed the micro-cracks presence. Our study found direct correlation between areas of high impurity contamination, micro cracks and hot-spot heating.

Influence Factors of Calcium Carbonate Whiskers Prepared by Intermittent Bubbling Method

2013 ◽  
Vol 310 ◽  
pp. 80-84 ◽  
Author(s):  
Bei Ping Liu ◽  
Jian Chen ◽  
Fang Bo Liu ◽  
Shi Biao Zhou ◽  
Yuan Dao Chen ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Calcium Carbonate ◽  
Aspect Ratio ◽  
Smooth Surface ◽  
Influence Factors ◽  
Large Aspect Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron

Calcium carbonate whiskers were successfully prepared in the MgC12-Ca(OH)2-CO2 system by a intermittent bubbling method and characterized by X-ray diffraction and scanning electron microscopy. The results demonstrated that aragonite style calcium carbonate whiskers with well morphology, large aspect ratio and smooth surface can be obtained by controlling technical conditions such as reaction temperature, concentration of Ca(OH)2 and amount of additives and under the conditions of CO2 flow velocity of 3.4ml/min/gCa(OH)2, flow of CO2 to air ratio of 1:4, stirring speed of 240 r/min.

Experimental Study on the Wear of Diamond Tools in Precision Cutting of Titanium Alloy

2013 ◽  
Vol 579-580 ◽  
pp. 61-64
Author(s):  
Guo Jun Dong ◽  
Yu Liang Zhang ◽  
Ming Zhou ◽  
Mao Wei Li
Keyword(s):  
Electron Microscopy ◽  
Titanium Alloy ◽  
Cutting Tool ◽  
Flank Wear ◽  
Adhesive Wear ◽  
Polycrystalline Diamond ◽  
Wear Area ◽  
Hard Particles ◽  
Alloy Material ◽  
Scanning Electron

Titanium alloy is a kind of materials difficult to be machined. In this paper, the author performed the wear experiment of polycrystalline diamond (PCD) tool in precision cutting of titanium alloy material Ti-6A1-4V, and carried out test for morphology and composition of the wear area of tool using scanning electron microscopy and energy dispersive analyzer. The results showed that the hard particles wear and adhesive wear were main reason for cutting tool wear, and main wear form is flank wear.

Analysis of Linear Defects of Cold-Rolled Galvanized Sheet

2013 ◽  
Vol 652-654 ◽  
pp. 2034-2037 ◽  
Author(s):  
Qi Chun Peng ◽  
Jin Ling Yang ◽  
Sheng Peng ◽  
Xue Hui Zhang ◽  
Shu Ping Tang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Rolled Sheet ◽  
Linear Defect ◽  
Linear Defects ◽  
Micro Cracks ◽  
Cold Rolled ◽  
Al2o3 Particles ◽  
Scanning Electron ◽  
Common Defect

Linear defect is a common defect of galvanized sheet. Formation mechanism of linear defect was analyzed by scanning electron microscopy (SEM) and energy disperses spectroscopy (EDS). The results indicate that Al2O3 particles which have a size less than 7μm are enriched in the shallow surface of the substrate. Al2O3 particles are exposed during rolling, resulting in scratches and rough spots on cold-rolled sheet. The places where Al2O3 inclusions enrich are easy to form surface micro-cracks. Linear defects are formed at the places of scratches or cracks during hot dip galvanizing. Optimum measures are putted forward based on Al2O3 inclusions and cracks.

Study of Nano Coating Micron Calcite Reaction Process and Influence Factors

2014 ◽  
Vol 597 ◽  
pp. 28-31
Author(s):  
Ning Bo Huo ◽  
Sheng Liu ◽  
Xiao Jinga Jia
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Scanning Electron Microscopy ◽  
Electrode Potential ◽  
Potential Temperature ◽  
Influence Factors ◽  
Reaction Process ◽  
Stirring Rate ◽  
Nano Coating ◽  
Scanning Electron

Adjusting the proportion of gases and stirring rate and other parameters, the value of pH, electrical conductivity, electrode potential, temperature of the system were tested online under different parameters. According to the results of scanning electron microscopy , the coating effect of different reaction stages and the influence of different coating processes were analyzed.

Effect of the Cutting Speed and Temperature on the Cutting Behavior of Hardened Steel 42CrMo with PCBN Tool

2012 ◽  
Vol 426 ◽  
pp. 36-39
Author(s):  
Ning Liu ◽  
Hai Dong Yang ◽  
Z. Ding ◽  
C.G. Zhang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Wear Mechanism ◽  
Cutting Tool ◽  
Cutting Speed ◽  
Hardened Steel ◽  
Pcbn Tool ◽  
Cutting Behavior ◽  
Scanning Electron

The cutting behavior of hardened steel 42CrMo with PCBN cutting tool was studied. The wear and the bottom chip were examined by means of scanning electron microscopy model JSM6490LV. The wear mechanism of tool was also analyzed.

Aspects of Wear Mechanisms of Carbide Tools when Machine Hastelloy C-22HS

2009 ◽  
Vol 83-86 ◽  
pp. 295-302 ◽  
Author(s):  
K. Kadirgama ◽  
M.M. Noor ◽  
K.A. Abou-El-Hossein ◽  
B. Mohammad ◽  
H.H. Habeeb
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
High Temperature ◽  
Wear Mechanisms ◽  
Cutting Tool ◽  
Crater Wear ◽  
Carbide Inserts ◽  
Fast Rates ◽  
Scanning Electron ◽  
Better Than

In this study the performances of some commercially available carbide inserts when machining Hastelloy C-22HS was investigated under scanning electron microscopy (SEM) for wear mechanisms and other microstructure defects. Carbide inserts coated with TiCN/TiN and TiALN/ TiN experienced severe intergranular fractures and cracks. High temperature causes the layer of the coating to wear off and subsequently the inserts damaged at fast rates. Both types of inserts suffered from high crater wear and thermal cracking. Most of the wear occurred at the nose and flank of the inserts. Generally, it was observed that carbide coated with TiALN/ TiN cutting tool performed better than carbide coated TiCN/TiN cutting tool when milling Hastelloy C-22HS

Microstructural Damage and Evolution of a PbSn Solder Alloy Under Isothermal Cyclic Loading

2002 ◽  
Author(s):  
T. Jesse Lim ◽  
Wei-Yang Lu
Keyword(s):  
Electron Microscopy ◽  
High Temperature ◽  
Solder Alloy ◽  
Room Temperature ◽  
Rich Phase ◽  
Microstructural Damage ◽  
Micro Cracks ◽  
Phase Size ◽  
Pbsn Solder ◽  
Scanning Electron

In our recent experiments, torsional specimens of PbSn Solder Alloy were cyclically loaded under different loading levels at both room temperature and high temperature (1008C). In these experiments, the Pb-rich phase size and micro-crack damage were also observed using scanning electron microscopy in-between loading cycles. At the moderate strain rate (10−4), the growth of Pb-rich phase does not differ much for both temperatures. At room temperature, the damage in the form of micro-cracks along the Pb- and Sn-rich phases are formed during early cycling, and the damage accumulates as the cycling proceeds. At high temperature, the damage does not accumulates as fast as for the similar strain level in room temperature, due to the lowering of stress level in high temperature and dynamic restructuring of Pb-rich phase.

Sign in / Sign up

Export Citation Format

Share Document