The Influence of the Technical Parameters on the Quality of Engineering Ceramics by Abrasive Waterjet

2013 ◽  
Vol 416-417 ◽  
pp. 1689-1692
Author(s):  
Feng Lian Zhang ◽  
Jing Zhu
Keyword(s):  
High Temperature ◽  
High Hardness ◽  
Abrasive Waterjet ◽  
Engineering Ceramics ◽  
Wear Resistant ◽  
Technical Parameters ◽  
Machining Quality ◽  
Conventional Machining

Engineering Ceramics is a inorganic nonmetal material, which is sintered at high-temperature. ceramics have promising potential as high-temperature strength.erosion-resistant, wear-resistant and hot impact-resistant.However, because they have high hardness and brittleness as well as nonconductive, it is very difficult to machine them using conventional machining. Their use-area is restricted. At presently, the machining technology of Engineering Ceramics by abrasive waterjet become more and more important for humankind. In this paper, the influence of technical parameters on machining quality has been studied and analyzed. A better changing method of technical parameters is given.

Modeling Technological Parameters for Producing Combined Electrospark Deposition Coatings

2019 ◽  
Vol 968 ◽  
pp. 131-142 ◽  
Author(s):  
Viacheslav Tarelnyk ◽  
Ievgen Konoplianchenko ◽  
Nataliia Tarelnyk ◽  
Aleksey Kozachenko
Keyword(s):  
Electrode Materials ◽  
Protective Coatings ◽  
High Hardness ◽  
Mass Transfer Process ◽  
Electrode Pair ◽  
Surface Plastic ◽  
Technological Parameters ◽  
Electrospark Deposition ◽  
Wear Resistant

The paper represents a formalized methodology for solving the problem of creating fundamentally new materials, such as "base - coating" ones, which have increased surface wear resistance and relatively high strength and viscosity. Electrospark alloying (ESA) method is proposed as a process for depositing protective coatings on metal surfaces. There are considered the issues of improving the quality of the coatings formed by the ESA method. There is specified a feature of processing the surfaces having been treated with the use of the ESA method, which feature being associated with a relatively small thickness of the layers formed (tens of micrometers). Since to reduce the roughness of the surface, the process of grinding is difficult or even unacceptable to perform, it has been suggested to use the method of surface plastic deformation (SPD). One of the effective SPD methods for finishing the parts is a diamond smoothing process, which, in contrast to running-in with a ball or roller, allows processing the parts of very high hardness values. As a reserve to improve the quality of coatings formed by the ESA method, there is considered a process for producing combined electrospark deposition coatings (CEC) with hard wear-resistant and soft anti-friction metals integrated therein. There are represented the results of mass transfer process investigation performed at forming the CEC on the specimens of steel 45 with indium, tin and copper being used as soft antifriction metals, and tungsten and hard alloy of VK8 grade applied as wear-resistant materials. There is represented a mathematical model for calculating the main ESA technological parameters being necessary for forming the CEC and allowing to predict the weight gain (increase in weight) and size gain (increase in size) at the cathode (the part). It allows predicting the CEC main technological parameters for any electrode pair materials (substrate material and electrode materials making up the CEC).

scholarly journals Design of Wear-Resistant Diecast AlSi9Cu3(Fe) Alloys for High-Temperature Components

Metals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 55 ◽  
Author(s):  
Giulio Timelli ◽  
Alberto Fabrizi ◽  
Simone Vezzù ◽  
Alessandro De Mori
Keyword(s):  
High Temperature ◽  
High Hardness ◽  
Wear Resistant ◽  
Fe Alloys ◽  
High Temperature Components ◽  
Alloy Softening ◽  
Pin On Disk ◽  
Iron Manganese ◽  
Image Analysis Techniques ◽  
Wear Tests

Type AlSi9Cu3(Fe) alloy has been modified by alloying with iron, manganese, and chromium elements to develop wear-resistant diecast hypoeutectic Al–Si–Cu alloys that can be applied for high-temperature applications. Several alloys have been produced by varying iron, manganese, and chromium levels (0.80, 1.00, 1.20 wt.% for Fe; 0.25, 0.40, 0.55 wt.% for Mn, and 0.06, 0.10 wt.% for Cr). Brinell hardness measurements and pin-on-disk wear tests have been conducted from room temperature up to 200 °C. The microstructural changes that occurred with the different alloying levels have been quantitatively examined by metallographic and image analysis techniques. The results showed how the increasing content of the Fe, Mn, and Cr promoted the precipitation of both primary and secondary Fe-enriched particles, mainly with polyhedral, blocky, and star-like morphologies. These compounds showed high hardness that is not affected by chemical composition and morphology variation. At high temperatures, the diecast alloys always showed lower average hardness and wear resistance, especially at 200 °C; however, a greater amount of Fe-rich particles can compensate the alloy softening.

Research on Hole-Making Tools for CFRP

2013 ◽  
Vol 797 ◽  
pp. 592-596 ◽  
Author(s):  
Hong Zhou Zhang ◽  
Ying Ying Wei ◽  
Yi Chu Yuan ◽  
Hong Yu Jiang
Keyword(s):  
Selection Method ◽  
Drilling Process ◽  
Machining Parameters ◽  
Hole Quality ◽  
Technical Parameters ◽  
Machining Quality ◽  
Drilling Tools ◽  
Hole Making ◽  
Hole Machining

There are lots of defects in the drilling process of CFRP, such as splitting, etc, which may affect the assembly quality of the composite materials. Through the analysis of the drilling mechanism of CFRP, and with the help of the correlation experiments of drilling tools, the effects of machining parameters and machining tools on hole quality are studied, the optimal selection method of the drilling tools for CFRP and the selection principle of technical parameters under different machining conditions are also discussed. And the tools geometry affects the hole-machining quality of CFRP materials directly, which should be chosen in accordance with the hole-machining method.

scholarly journals Stochastic simplified modelling of abrasive waterjet footprints

2016 ◽  
Vol 472 (2186) ◽  
pp. 20150836 ◽  
Author(s):  
P. Lozano Torrubia ◽  
J. Billingham ◽  
D. A. Axinte
Keyword(s):  
Differential Equation ◽  
Stochastic Partial Differential Equation ◽  
Abrasive Waterjet ◽  
Random Component ◽  
Erosion Process ◽  
Complex Shapes ◽  
Main Components ◽  
Etched Surface ◽  
Conventional Machining

Abrasive micro-waterjet processing is a non-conventional machining method that can be used to manufacture complex shapes in difficult-to-cut materials. Predicting the effect of the jet on the surface for a given set of machine parameters is a key element of controlling the process. However, the noise of the process is significant, making it difficult to design reliable jet-path strategies that produce good quality parts via controlled-depth milling. The process is highly unstable and has a strong random component that can affect the quality of the workpiece, especially in the case of controlled-depth milling. This study describes a method to predict the variability of the jet footprint for different jet feed speeds. A stochastic partial differential equation is used to describe the etched surface as the jet is moved over it, assuming that the erosion process can be divided into two main components: a deterministic part that corresponds to the average erosion of the jet and a stochastic part that accounts for the noise generated at different stages of the process. The model predicts the variability of the trench profiles to within less than 8%. These advances could enable abrasive micro-waterjet technology to be a suitable technology for controlled-depth milling.

INFLUENCE OF FORCED CONVECTION IN LIQUID INSIDE THE TIN ON DURATION OF STERILIZATION IN THE COURSE OF FISH PROCESSING

2017 ◽  
pp. 137-144
Author(s):  
Gennadiy Valentinovich Alexeev ◽  
Elena Igorevna Verboloz
Keyword(s):  
High Temperature ◽  
Liquid Phase ◽  
Forced Convection ◽  
Thermal Process ◽  
Processing Time ◽  
Fish Processing ◽  
Study Results ◽  
Equipment Modernization ◽  
Bottom To Top

The article focuses on the process of intensive mixing of liquid phase in the tin during high-temperature sterilization, i.e. sterilization when temperature of the heat carrier reaches 150-160°C. It has been stated that for intensification of the thermal process during sterilization of tinned fish with liquid filling it is preferable to turn a tin from bottom to top. This operation helps to increase the driving power of the process and to shorten warming time. Besides, high-temperature sterilization carried out according to experimental modes, where the number of tin turnovers is calculated, greatly shortens processing time and improves quality of the product. In this case there is no superheating, all tins are evenly heated. The study results will contribute to equipment modernization and to preserving valuable food qualities.

REYNOLDS 390 and A390

Alloy Digest ◽  
1971 ◽  
Vol 20 (8) ◽  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
High Hardness ◽  
Heat Treating ◽  
Silicon Alloys ◽  
Aluminum Silicon Alloys ◽  
Temperature Performance

Abstract REYNOLDS 390 and A390 are hypereutectic aluminum-silicon alloys having excellent wear resistance coupled with good mechanical properties, high hardness, and low coefficients of expansion. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, and machining. Filing Code: Al-203. Producer or source: Reynolds Metals Company.

XAR 450 Premium

Alloy Digest ◽  
2018 ◽  
Vol 67 (12) ◽  
Keyword(s):  
High Temperature ◽  
Structural Steel ◽  
Tensile Properties ◽  
Thick Plate ◽  
Heat Treating ◽  
Wear Resistant ◽  
Temperature Performance

Abstract XAR 450 Premium is a special wear-resistant structural steel as thick plate that is water quenched and tempered. These wear resistant materials last at least five times longer than conventional steels due to their extreme hardness and toughness. This datasheet provides information on composition, microstructure, hardness, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SA-833. Producer or source: ThyssenKrupp Steel Europe AG.

XAR 400 Premium

Alloy Digest ◽  
2018 ◽  
Vol 67 (11) ◽  
Keyword(s):  
High Temperature ◽  
Structural Steel ◽  
Tensile Properties ◽  
Thick Plate ◽  
Heat Treating ◽  
Wear Resistant ◽  
Temperature Performance

Abstract XAR 400 Premium is a special wear-resistant structural steel as thick plate that is water quenched and tempered. These wear-resistant materials last at least five times longer than conventional steels due to their extreme hardness and toughness. This datasheet provides information on composition and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SA-830. Producer or source: ThyssenKrupp Steel Europe AG.

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