Formation of Chromium Carbide on Carbon Tool Steel by EDM in Powder Mixed Working Fluid

2017 ◽  
Vol 2017.9 (0) ◽  
pp. 024
Author(s):  
Ruixiang Wang ◽  
Yuta Iida ◽  
Ryoji Kitada ◽  
Akira Okada
Keyword(s):  
Chromium Carbide ◽  
Tool Steel ◽  
Working Fluid

On the formation and properties of chromium carbide and vanadium carbide coatings produced on W1 tool steel through thermal reactive diffusion (TRD)

2020 ◽  
Vol 46 (16) ◽  
pp. 25320-25329 ◽  
Author(s):  
Omid Ganji ◽  
Seyed Abdolkarim Sajjadi ◽  
Zhi Gang Yang ◽  
Mostafa Mirjalili ◽  
Mohammad Reza Najari
Keyword(s):  
Chromium Carbide ◽  
Tool Steel ◽  
Vanadium Carbide ◽  
Reactive Diffusion ◽  
Carbide Coatings

scholarly journals Heat treatment effects on three-dimensional morphology of chromium carbide in AISI D2 tool steel studied by serial sectioning method

2018 ◽  
Author(s):  
Seyedeh Mastooreh Seyedi Ghezghapan
Keyword(s):  
Heat Treatment ◽  
Chromium Carbide ◽  
Tool Steel ◽  
Treatment Effects ◽  
Three Dimensional ◽  
Serial Sectioning ◽  
Tempering Temperature ◽  
Sectioning Method ◽  
Aisi D2 ◽  
Aisi D2 Tool Steel

We developed a three-dimensional microstructure analysis system based on the manual serial sectioning method to evaluate the heat treatment effects on chromium carbide size and morphology in AISI D2 tool steel. Two heat treatment factors, austenitizing and tempering temperature were investigated. The results show that increasing in austenitizing temperature leads to further carbide precipitation after the tempering process and increasing in the tempering temperature causes precipitate smaller secondary carbides even more than the primary carbides.

Experimental study of thermohydraulic characteristics and irreversibility analysis of novel axial corrugated tube with spring tape inserts

2020 ◽  
Vol 92 (3) ◽  
pp. 30901
Author(s):  
Suvanjan Bhattacharyya ◽  
Debraj Sarkar ◽  
Ulavathi Shettar Mahabaleshwar ◽  
Manoj K. Soni ◽  
M. Mohanraj
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Thermal Performance ◽  
Working Fluid ◽  
The Novel ◽  
Heat Exchanger Tube ◽  
Heat Transfer Augmentation ◽  
Corrugated Tube ◽  
The Impact ◽  
Exchanger Tube

The current study experimentally investigates the heat transfer augmentation on the novel axial corrugated heat exchanger tube in which the spring tape is introduced. Air (Pr = 0.707) is used as a working fluid. In order to augment the thermohydraulic performance, a corrugated tube with inserts is offered. The experimental study is further extended by varying the important parameters like spring ratio (y = 1.5, 2.0, 2.5) and Reynolds number (Re = 10 000–52 000). The angular pitch between the two neighboring corrugations and the angle of the corrugation is kept constant through the experiments at β = 1200 and α = 600 respectively, while two different corrugations heights (h) are analyzed. While increasing the corrugation height and decreasing the spring ratio, the impact of the swirling effect improves the thermal performance of the system. The maximum thermal performance is obtained when the corrugation height is h = 0.2 and spring ratio y = 1.5. Eventually, correlations for predicting friction factor (f) and Nusselt number (Nu) are developed.

Model, simulation and experiments for a Buoyancy Organic Rankine Cycle

2020 ◽  
Vol 92 (1) ◽  
pp. 10906
Author(s):  
Jeroen Schoenmaker ◽  
Pâmella Gonçalves Martins ◽  
Guilherme Corsi Miranda da Silva ◽  
Julio Carlos Teixeira
Keyword(s):  
Model Simulation ◽  
Organic Rankine Cycle ◽  
Thermodynamic Cycle ◽  
Rankine Cycle ◽  
Test Body ◽  
Working Fluid ◽  
Proof Of Concept ◽  
Energy Scenario ◽  
New Type ◽  
Fluid Reservoir

Organic Rankine Cycle (ORC) systems are increasingly gaining relevance in the renewable and sustainable energy scenario. Recently our research group published a manuscript identifying a new type of thermodynamic cycle entitled Buoyancy Organic Rankine Cycle (BORC) [J. Schoenmaker, J.F.Q. Rey, K.R. Pirota, Renew. Energy 36, 999 (2011)]. In this work we present two main contributions. First, we propose a refined thermodynamic model for BORC systems accounting for the specific heat of the working fluid. Considering the refined model, the efficiencies for Pentane and Dichloromethane at temperatures up to 100 °C were estimated to be 17.2%. Second, we show a proof of concept BORC system using a 3 m tall, 0.062 m diameter polycarbonate tube as a column-fluid reservoir. We used water as a column fluid. The thermal stability and uniformity throughout the tube has been carefully simulated and verified experimentally. After the thermal parameters of the water column have been fully characterized, we developed a test body to allow an adequate assessment of the BORC-system's efficiency. We obtained 0.84% efficiency for 43.8 °C working temperature. This corresponds to 35% of the Carnot efficiency calculated for the same temperature difference. Limitations of the model and the apparatus are put into perspective, pointing directions for further developments of BORC systems.

6. Evaluation of Five Extraction Protocols for Determination of Endotoxin in Metal Working Fluid Aerosol

2001 ◽  
Author(s):  
K. Bartlett ◽  
J. Phipps ◽  
K. Kulhankova ◽  
P. Thorne
Keyword(s):  
Working Fluid ◽  
Metal Working

425. An Evaluation of Metal Working Fluid Mist Generation at a Machining Center

1999 ◽  
Author(s):  
W. Heitbrink ◽  
G. Dye ◽  
A. Spencer
Keyword(s):  
Working Fluid ◽  
Metal Working ◽  
Machining Center
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