On the Deep Small Hole Machining Method of Nickel-Based High-Temperature Alloy

2011 ◽  
Vol 199-200 ◽  
pp. 1874-1879
Author(s):  
Shi Chun Di ◽  
Zhao Long Li ◽  
Dong Bo Wei
Keyword(s):  
High Temperature ◽  
Electrochemical Machining ◽  
Machining Process ◽  
Speed Ratio ◽  
High Temperature Alloy ◽  
Technological Parameters ◽  
High Quality ◽  
Radial Overcut ◽  
The Mathematical Model ◽  
Hole Machining

In this paper, a machining method of deep hole on the nickel-based high-temperature alloy using the pulse electrochemical machining is proposed. The effect of five technological parameters on the depth-averaged radial overcut of the hole to be machined in the machining process is discussed; then the mathematical model is built, and the effect of parameters on the overcut is illustrated. The speed ratio is determined to judge the quality and the processing performance of holes. The technological parameters adopted in the experiment, can be used to produce effectively high-quality hole of big proportion of depth to diameter on the nickel-based high-temperature alloy in the machining process.

Research on NC Electrochemical Mechanical Drilling

2012 ◽  
Vol 271-272 ◽  
pp. 476-482
Author(s):  
Wei Min Gan ◽  
Bo Xu ◽  
Zhi Fang Zhao
Keyword(s):  
Stainless Steel ◽  
Electrochemical Machining ◽  
304 Stainless Steel ◽  
High Temperature Alloy ◽  
Mechanical Grinding ◽  
High Quality ◽  
Taper Angle ◽  
Composite Cathodes ◽  
High Efficient ◽  
Drilling Method

NC electrochemical mechanical drilling was based on NC, Electrochemical machining and mechanical grinding. It drilled with different diameter composite cathodes. This kind of drilling method took the advantages of electrochemical mechanical, so it was not restricted by parts’ strength, hardness and stiffness. The cover of cathode ensured the drilling precision. So this technology should be studied. This paper took 304 stainless steel and high temperature alloy GH710 to do study, at last the reasonable and high efficient process parameters were found in the experiment. The high quality holes of better roundness and small taper angle were drilled. The results showed that the study of NC electrochemical mechanical drilling difficult-to-machine materials was very meaningful.

Numerical Simulation of Electrochemical Machining Process and Machined Surface Prediction

2010 ◽  
Vol 458 ◽  
pp. 99-105 ◽  
Author(s):  
F.Y. Wang ◽  
Jia Wen Xu ◽  
Jian She Zhao
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
Electrochemical Machining ◽  
Prediction Method ◽  
Time Discretization ◽  
Simulation Software ◽  
Machining Process ◽  
Machined Surface ◽  
Surface Prediction ◽  
The Mathematical Model

In order to predicate machined shape of electrochemical machining (ECM), a machined shape prediction method by using numerical simulation is presented in this paper. For the simulation, the mathematical model based on electric field and flow field theories firstly is built. Then the time discretization method and the finite element method (FEM) are employed to solve the mathematical model. The simulation software is developed to perform the simulation of the ECM process and predict the machined shape. Finally the method is applied in the ECM processes of the blade and the cavity. The application results show that the machined surface with high accuracy can be achieved and less test times is needed by the simulation.

Research on Breaking Chip and Drilling Force for High Temperature Alloy Based on Self-Vibratory Drilling Head

2011 ◽  
Vol 299-300 ◽  
pp. 1044-1047
Author(s):  
Xing Jun Gao ◽  
Ping Zou ◽  
De Jun Li ◽  
Zhi Yang Xiang
Keyword(s):  
High Temperature ◽  
Machining Process ◽  
Axial Vibration ◽  
High Temperature Alloy ◽  
Drilling Force ◽  
Chip Technology ◽  
Drilling Parameters ◽  
Drilling Technology ◽  
Vibration Drilling ◽  
Small Elements

Problems to evacuate chips will arise from manufacturing deep holes, especially for small diameters. Such problems induce frequent tool breakage and poor surface quality. The vibratory drilling enables the chip to be split into small elements thanks to the axial vibrations of the drill, self-maintained by the cutting energy. This research aims to improve breaking chip concerning high temperature alloy by vibraiont drilling as well as to establish a drilling technology. The development of breaking chip technology was presented. By the aid of the self-made vibrating drilling table, the axial vibration drilling was experimented on high temperature alloy with different parameter of vibration drilling. The breaking chip effect of vibration cutting was studied, and the axial drilling force and torque of vibration drilling were analyzed. The relation of each parameter and its effect on machining process was theoretically discussed. The experiment results show that vibration drilling is in favor of breaking chip, making the volume of chip small, and removing chips fluently, and the change of drilling force is relatively steady with some drilling parameters.

Research on Vibration Drilling the Inclined Hole

2014 ◽  
Vol 602-605 ◽  
pp. 451-454
Author(s):  
Peng Zhang ◽  
Xing Yu Guo ◽  
Zhi Guang Guan
Keyword(s):  
High Temperature ◽  
Difficult Problem ◽  
Hole Drilling ◽  
High Temperature Alloy ◽  
Drilling Method ◽  
Vibration Drilling ◽  
Hole Machining

Aim to the difficult problem of the inclined hole machining, the vibration drilling method is analysed and adopted. The experiment of the 60°inclined hole drilling on high-temperature alloy was performed, and the notable effects were obtained. It can be draw from the results that the vibration drilling method break the limit of the jig for the inclined hole driling. The vibration drilling the inclined hole has became the new path.

scholarly journals The Measurement of High-Temperature Expansion as the Standard of Estimation the Knock-Out Properties of Moulding Sands with Hydrated Sodium Silicate

2014 ◽  
Vol 59 (2) ◽  
pp. 739-742 ◽  
Author(s):  
K. Major-Gabryś ◽  
S.M. Dobosz ◽  
P. Jelínek ◽  
J. Jakubski ◽  
J. Beňo
Keyword(s):  
High Temperature ◽  
Sodium Silicate ◽  
New Method ◽  
Environmental Standards ◽  
Technological Parameters ◽  
High Quality ◽  
Knock Out ◽  
Temperature Expansion ◽  
Important Group ◽  
High Temperature Expansion

Abstract The necessity of receiving high quality castings forces undertaking research to elaborate moulding and core sands ensuring obtaining the materials with relevant technological parameters and also with high environmental standards. The most important group here are moulding sands with hydrated sodium silicate. Unfortunately, their fundamental disadvantages are weak knock-out properties. The article presents the most commonly used methods of measuring the knock-out properties of moulding and core sands. The authors propose a new method for estimation this parameter. The method is based on the measurement of high-temperature expansion.

High-Temperature Synthesis of CdSe-Based Core/Shell, Core/Shell/Shell, and Core/Graded-Shell Nanoplatelets for Stable and Efficient Narrowband Emitters

2019 ◽  
Author(s):  
Aurelio A. Rossinelli ◽  
Henar Rojo ◽  
Aniket S. Mule ◽  
Marianne Aellen ◽  
Ario Cocina ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Temperature ◽  
Equilibrium Shape ◽  
Size Variation ◽  
Crystal Defects ◽  
Atomic Scale ◽  
Quantum Yields ◽  
Core Shell ◽  
Compositional Gradient ◽  
High Quality

<div>Colloidal semiconductor nanoplatelets exhibit exceptionally narrow photoluminescence spectra. This occurs because samples can be synthesized in which all nanoplatelets share the same atomic-scale thickness. As this dimension sets the emission wavelength, inhomogeneous linewidth broadening due to size variation, which is always present in samples of quasi-spherical nanocrystals (quantum dots), is essentially eliminated. Nanoplatelets thus offer improved, spectrally pure emitters for various applications. Unfortunately, due to their non-equilibrium shape, nanoplatelets also suffer from low photo-, chemical, and thermal stability, which limits their use. Moreover, their poor stability hampers the development of efficient synthesis protocols for adding high-quality protective inorganic shells, which are well known to improve the performance of quantum dots. <br></div><div>Herein, we report a general synthesis approach to highly emissive and stable core/shell nanoplatelets with various shell compositions, including CdSe/ZnS, CdSe/CdS/ZnS, CdSe/Cd<sub>x</sub>Zn<sub>1–x</sub>S, and CdSe/ZnSe. Motivated by previous work on quantum dots, we find that slow, high-temperature growth of shells containing a compositional gradient reduces strain-induced crystal defects and minimizes the emission linewidth while maintaining good surface passivation and nanocrystal uniformity. Indeed, our best core/shell nanoplatelets (CdSe/Cd<sub>x</sub>Zn<sub>1–x</sub>S) show photoluminescence quantum yields of 90% with linewidths as low as 56 meV (19.5 nm at 655 nm). To confirm the high quality of our different core/shell nanoplatelets for a specific application, we demonstrate their use as gain media in low-threshold ring lasers. More generally, the ability of our synthesis protocol to engineer high-quality shells can help further improve nanoplatelets for optoelectronic devices.</div>

INCO ALLOY 330

Alloy Digest ◽  
1992 ◽  
Vol 41 (5) ◽  
Keyword(s):  
Heat Treatment ◽  
Solid Solution ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Heat Treating ◽  
High Temperature Alloy ◽  
Nickel Iron ◽  
Temperature Performance ◽  
Inco Alloy ◽  
Iron Chromium

Abstract INCO ALLOY 330 is a nickel/iron/chromium austenitic alloy, not hardenable by heat treatment. It is a solid solution strengthened high-temperature alloy. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-403. Producer or source: Inco Alloys International Inc..

HASTELLOY ALLOY S

Alloy Digest ◽  
1973 ◽  
Vol 22 (1) ◽  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Heat Treating ◽  
High Temperature Alloy ◽  
Excellent Thermal Stability ◽  
Cabot Corporation ◽  
High Temperature Mechanical Properties ◽  
Temperature Performance ◽  
Resistance To Oxidation ◽  
Nickel Base

Abstract HASTELLOY alloy S is a nickel-base high-temperature alloy having excellent thermal stability, good high-temperature mechanical properties and excellent resistance to oxidation up to 2000 F. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-184. Producer or source: Stellite Division, Cabot Corporation.

AISI No. 664

Alloy Digest ◽  
1981 ◽  
Vol 30 (7) ◽  
Keyword(s):  
High Temperature ◽  
Stress Rupture ◽  
Heat Treating ◽  
Good Combination ◽  
Creep And Stress Rupture ◽  
High Temperature Alloy ◽  
Vacuum Melting ◽  
Stress Rupture Properties ◽  
Nickel Base ◽  
Rupture Properties

Abstract AISI No. 664 is a nickel-base high-temperature alloy that can be precipitation hardened because of its contents of aluminum and titanium. Vacuum melting is used in its production to provide excellent quality and reproducability. It is used for applications requiring a good combination of creep and stress-rupture properties up to about 1500 F. Typical applications are gas-turbine components, airframes and fasteners. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ni-269. Producer or source: Nickel alloy producers.

Ti-679

Alloy Digest ◽  
1966 ◽  
Vol 15 (11) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Creep Strength ◽  
Heat Treating ◽  
High Temperature Alloy ◽  
Temperature Performance ◽  
Time Strength ◽  
Short Time

Abstract Ti-679 is a titanium high temperature alloy having an excellent combination of short-time strength, creep strength and stability to 900 F. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ti-48. Producer or source: Titanium Metals Corporation of America.

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