Semi-solid casting of high speed steel ingots using inclined slope pre-crystallization method

2009 ◽  
Vol 24 (5) ◽  
pp. 750-752 ◽  
Author(s):  
Youfeng He ◽  
Shuming Xing ◽  
Shuisheng Xie ◽  
Guojie Huang ◽  
Lei Cheng ◽  
...  
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Crystallization Method ◽  
Inclined Slope ◽  
Steel Ingots ◽  
Semi Solid

Making Non-Dendritic Structure via Modified Cooling Slope Technique

2014 ◽  
Vol 915-916 ◽  
pp. 602-607 ◽  
Author(s):  
Y.T. Chen ◽  
Chi Y.A. Tsao ◽  
C.H. Chiang
Keyword(s):  
Cooling Rate ◽  
Solid Fraction ◽  
Process Parameters ◽  
Water Flow Rate ◽  
Slope Angle ◽  
Dendritic Structure ◽  
Pouring Temperature ◽  
Cooling Slope ◽  
Inclined Slope ◽  
Dendritic Microstructures

The cooling slope technique has been developed in recent years, which controls the nucleation and growth of the primary grains during solidification to achieve fine and non-dendritic microstructures. In this study, A356 Al alloys were processed through a modified cooling slope technique to obtain fine, non-dendritic microstructures, in which the cooling rate of the cast crucible was controlled. Three process parameters, namely pouring temperature, inclined slope angle, and the cooling rate of the cast crucible, were varied during the processing. The cooling slope was water-cooled with a constant water flow rate. The solid fraction and the size distributions of the primary grains along the vertical and horizontal positions of the cast ingots were measured individually. The macro-segregation was examined in terms of the distribution of the solid fraction. The yields of the ingots were calculated for studying the efficiency of the cooling slope technique. The effects of the three process parameters on the microstructures, macro-segregation, and yields were studied by the Taguchi method.

scholarly journals Numerical study of a sphere descending along an inclined slope in a liquid

2017 ◽  
Vol 19 (4) ◽  
Author(s):  
Chuanhu Zhang ◽  
Kenichi Soga ◽  
Krishna Kumar ◽  
Qicheng Sun ◽  
Feng Jin
Keyword(s):  
Numerical Study ◽  
Inclined Slope

Effect of Grain Refiner on Microstructure of Semi-Solid A356 Aluminium Alloy

2014 ◽  
Vol 1024 ◽  
pp. 251-254 ◽  
Author(s):  
Mohd Nasir Laila Masrur ◽  
Anasyida Abu Seman ◽  
Hussain Zuhailawati
Keyword(s):  
Aluminium Alloy ◽  
Master Alloy ◽  
Optical Microscope ◽  
Grain Refining ◽  
Grain Refiner ◽  
Inclined Slope ◽  
Semi Solid ◽  
Vicker’S Microhardness ◽  
Steel Mould ◽  
A356 Aluminium Alloy

Grain refining has been studied in the semi-solid-metal (SSM) casting by addition of master alloy Al-5Ti-1B using inclined slope. A356 aluminium alloy was melted at 850 °C and poured at 660 °C on the inclined slope into the steel mould. Grain refiner was added in various percentages of 0.2%, 0.5% and 1.0% in A356 aluminium alloy melt. Microstructure and microhardness were characterized using optical microscope and Vicker’s microhardness tester. The addition of master alloy Al-5Ti-1B not only refined but also increased the globularity of the primary α-Al particles. The higher hardness was achieved with 1% addition of master alloy Al-5Ti-1B.

scholarly journals Simulation of the effect of defence structures on granular flows using SPH

2002 ◽  
Vol 2 (3/4) ◽  
pp. 203-209 ◽  
Author(s):  
P. Lachamp ◽  
T. Faug ◽  
M. Naaim ◽  
D. Laigle
Keyword(s):  
Dead Zone ◽  
Free Surface Flow ◽  
Local Effect ◽  
Surface Flow ◽  
Numerical Results ◽  
Pressure Impact ◽  
Classical Formalism ◽  
Channel Slope ◽  
Inclined Slope ◽  
Real Flow

Abstract. This paper presents the SPH (Smoothed Particles Hydrodynamics) numerical method adapted to complex rheology and free surface flow. It has been developed to simulate the local effect of a simple obstacle on a granular flow. We have introduced this specific rheology to the classical formalism of the method and thanks to experimental devices, we were able to validate the results. Two viscosity values have been simultaneously computed to simulate "plugs" and "dead zone" with the same code. First, some experiments have been done on a simple inclined slope to show the accuracy of the numerical results. We have fixed the mass flow rate to see the variations of the flow depth according to the channel slope. Then we put a weir to block the flow and we analysed the dependence between the obstacle height and the length of influence upstream from the obstacle. After having shown that numerical results were consistent, we have studied speed profiles and pressure impact on the structure. Also results with any topography will be presented. This will have a great interest to study real flow over natural topography while using the model for decision help.

scholarly journals PETROLEUM POTENTIAL OF SOURCE BEDS IN THE CUU LONG BASIN

2011 ◽  
Vol 14 (4) ◽  
pp. 31-45
Author(s):  
Luan Thi Bui
Keyword(s):  
Organic Matter ◽  
Great Part ◽  
Source Rocks ◽  
Accumulation Process ◽  
Upper Eocene ◽  
North West ◽  
North East ◽  
Lower Oligocene ◽  
Upper Oligocene ◽  
Inclined Slope

In the Cuu Long basin, three source beds are identified: lower Miocene, Upper Oligocene, upper Eocene + lower Oligocene. They are separated from each other by sand-clay layers. Only Upper Oligocene and Upper Eocene + Lower Oligocene source beds are two main source beds supplying a great part of organic matter into traps. Petroleum source potential of Upper Oligocene source bed (66.30 billion tons) is greater than Upper Eocene + Lower Oligocene bed (29.88 billion tons). Total amount of hydrocarbon has ability to take part in accumulation process at the petroleumbearing traps from Upper Oligocene and Upper Eocene + Lower Oligocene source beds is over 2.19 billion tons and below 1.16 billion tons respectively. Thus, in whole CuuLong basin, source rocks have capacity to produce 96.18 billion tons of hydrocacbon in which accumulation is 3.35 billion tons making up 3.35% production quantity. Applying Monte - Carlo simulation method, using Crystal Ball software to calculate production potential and total amount of organic matter taking part into migration and accumulation process give rather appropriate result with difference level ≤ 1.25%.. Prospecting levels are in the following order: (i)Central lift zone has the greatest prospects, next is Dong Nai lift zone, graben located in north west inclined slope, south east inclined slope, north east area of Tam Dao lift zone finally. (2)Petroleum does not only accumulate in structural, combination traps but also in non-structural traps.

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