scholarly journals INFLUENCE OF THE POURING DIRECTION ON THE QUALITY OF THE MELT ENTERING THE MOLD AND OBTAINING A GOOD STANDARD CAST IRON SAMPLE

2021 ◽  
pp. 75-79
Author(s):  
A. A. Baron ◽  
L. V. Palatkina ◽  
S. V. Palatkin
Keyword(s):  
Computer Simulation ◽  
Cast Iron ◽  
Flow Rate ◽  
Axial Zone ◽  
Cast Sample ◽  
Iron Sample ◽  
Grey Cast ◽  
Optimal Values ◽  
Good Standard

The paper presents the results of computer simulation (on the example of grey cast iron of SCH 20 grade) of the influence of melt pouring direction on the degree of defects of shrinkage origin in the axial zone of the neck of a tensile sample when filling the mold cavity with a standard cast sample for optimal values of melt mass flow rate.

scholarly journals RESULTS OF SHRINKAGE ORIGIN DEFECTS DISTRIBUTION COMPUTER SIMULATION IN STANDARD CAST SAMPLE VOLUME OF GREY CAST IRON

2021 ◽  
pp. 71-78
Author(s):  
A. A. Baron ◽  
L. V. Palatkina ◽  
S. V. Palatkin
Keyword(s):  
Computer Simulation ◽  
Cast Iron ◽  
Computer Modeling ◽  
Software Package ◽  
Sample Volume ◽  
Grey Cast Iron ◽  
Cast Sample ◽  
Grey Cast

For cast iron grades SCH 15 and SCH 20, using the computer modeling system of casting processes in the environment of the LVMFlow software package, the possibility of predicting defects of shrinkage origin when obtaining a standard cast sample that determines the grade and quality of the castings of responsible purpose poured simultaneously with it is considered

scholarly journals Influence of Selected Parameters of Continuous Casting in the Electromagnetic Field on the Distribution of Graphite and Properties of Grey Cast Iron

2014 ◽  
Vol 59 (2) ◽  
pp. 747-751 ◽  
Author(s):  
J. Szajnar ◽  
M. Stawarz ◽  
T. Wróbel ◽  
W. Sebzda
Keyword(s):  
Electromagnetic Field ◽  
Cast Iron ◽  
Continuous Casting ◽  
Grey Cast Iron ◽  
Flake Graphite ◽  
Continuous Ingot ◽  
Grey Cast ◽  
Continuous Casting Mould ◽  
Selection Of

Abstract In paper problem concerning modification of grey cast iron EN-GJL-200 Grade, which is realized mainly by intensification of liquid metal movement in horizontal continuous casting mould containing electromagnetic stirrer is presented. The range of studies contains influence of electromagnetic field on morphology of graphite and usable properties i.e. tensile strength, hardness and machinability. Moreover the influence of velocity of ingot pulling on microstructure was analyzed. The results of studies and their analysis show possibility of improvement in quality of grey cast iron continuous ingot firstly in result of elimination of hard spots in structure by properly selection of velocity of ingot pulling and second in result of unification of size, shape and distribution of flake graphite by application of electromagnetic field.

The Influence of the Cooler Material on the Structure and Hardeness Gradient of a Grey Pearlitic Cast Iron

2015 ◽  
Vol 1128 ◽  
pp. 18-25 ◽  
Author(s):  
Sorin Ion Munteanu ◽  
Ioan Ciobanu ◽  
Aurel Crisan ◽  
Tibor Bedo ◽  
Daniel Feraru
Keyword(s):  
Cast Iron ◽  
Cooling Rate ◽  
Hardened Layer ◽  
Superficial Layer ◽  
Physical Characteristics ◽  
Grey Cast Iron ◽  
Industrial Practice ◽  
Iron Castings ◽  
Iron Sample ◽  
Grey Cast

The structure and properties of grey cast iron castings are considerably influenced by the cooling rate during solidification. In order to obtain grey cast iron parts with a hard superficial layer (wear resistant), external metallic coolers are placed on those surfaces during casting. This is the case of cam pushers, camshafts, driving shafts, metalworking rolls, etc. Cast iron coolers or steel coolers are mostly used in practice. The cooling rate during solidification is influenced by the thermo-physical characteristics of the coolers. This paper presents the results obtained by simulation and experimental research on coolers material influence on the structure and hardness of the surface layer of a pearlitic cast iron sample. It was studied the solidification of samples with dimensions 20 x 20 x 60 mm, cast of pearlitic cast iron in six variants: without a cooler and in the presence of some metallic coolers of different thermo-physical characteristics (iron, steel, copper, titanium and aluminum coated with a thin layer of steel). It was studied the influence of cooler material on structure of the superficial layer, on thickness of the hardened layer, on superficial hardness, on the temperature field and cooling rates. Conclusions are drawn regarding these influences and the possibility of using external coolers in industrial practice.

scholarly journals COMPUTER SIMULATION OF CASTING AND SOLIDIFICATION PROCESSES OF STANDARD CAST SAMPLES OF GREY CAST IRON

2021 ◽  
pp. 64-71
Author(s):  
A. A. Baron ◽  
L. V. Palatkina ◽  
S. V. Palatkin
Keyword(s):  
Computer Simulation ◽  
Cast Iron ◽  
Computer Modeling ◽  
Gray Cast Iron ◽  
Grey Cast Iron ◽  
Gray Cast ◽  
Casting And Solidification ◽  
Factors Affecting ◽  
Solidification Processes ◽  
Grey Cast

For standard tension samples of gray cast iron, the possibility of using computer modeling to study factors affecting the morphology of dendritic crystals and the volumetric arrangement of defects of shrinkage origin is shown.

Impact of flow rate on corrosion of cast iron and quality of re-mineralized seawater reverse osmosis (SWRO) membrane product water

Desalination ◽  
2013 ◽  
Vol 322 ◽  
pp. 76-83 ◽  
Author(s):  
Juan Liang ◽  
Anqi Deng ◽  
Rongjing Xie ◽  
Mylene Gomez ◽  
Jiangyong Hu ◽  
...  
Keyword(s):  
Cast Iron ◽  
Reverse Osmosis ◽  
Flow Rate ◽  
Seawater Reverse Osmosis ◽  
Product Water

scholarly journals COMPUTER SIMULATION OF FILLING SAND MOLD PROCESS WITH MELT FOR BLANKS OF STANDARD TENSILE SAMPLES OF CAST IRON PRODUCTION

2021 ◽  
pp. 73-80
Author(s):  
A. A. Baron ◽  
L. V. Palatkina ◽  
S. V. Palatkin
Keyword(s):  
Mechanical Properties ◽  
Computer Simulation ◽  
Cast Iron ◽  
Mold Filling ◽  
Sand Mold ◽  
Iron Production ◽  
Filling Process ◽  
Software Complex ◽  
Grey Cast ◽  
Characteristic Features

Visualization of the mold filling process in the environment of the LVMFlow software complex made it possible to identify the characteristic features of filling sand-shaped grey cast iron with melt to obtain samples for testing mechanical properties.

CHARACTERISTIC INTERNAL FRICTION SPECTRUM OF GREY CAST IRON

1981 ◽  
Vol 42 (C5) ◽  
pp. C5-929-C5-934 ◽  
Author(s):  
P. Millet ◽  
R. Schaller ◽  
W. Benoit
Keyword(s):  
Cast Iron ◽  
Internal Friction ◽  
Grey Cast Iron ◽  
Grey Cast ◽  
Internal Friction Spectrum

Radon removal by aeration: observations on testing, installation and maintenance of domestic treatment units

2009 ◽  
Vol 9 (4) ◽  
pp. 469-475
Author(s):  
T. Turtiainen
Keyword(s):  
Water Quality ◽  
Water Flow ◽  
Removal Efficiency ◽  
Flow Rate ◽  
Test Protocol ◽  
Household Water ◽  
Medium Flow ◽  
Removal Efficiencies ◽  
Frequent Sampling

Radon is one of the contaminants that sometimes impair the water quality of wells, especially those drilled in bedrock. Domestic radon removal units based on aeration have been commercially available for more than ten years. In order to determine how effectively these units remove radon a new test protocol applying frequent sampling while letting 100 litres of water flow, was developed. This way, removal efficiencies can be more accurately calculated and possible malfunctions detected. Seven models of domestic aerators designed for removing radon from household water were tested. The aerators were based on diffused bubble aeration, spray aeration or jet aeration. The average removal efficiencies for 100 litres with a medium flow rate were 86–100% except for a unit that circulated the aerated water back to the well that had removal efficiency of 80% at the maximum. By conducting a questionnaire study usual problems related to the aeration units were localized and recommendations on maintenance and installation are given accordingly.

MULTISTAGE MICROSTRIP UHF LOAD

2018 ◽  
pp. 53-57 ◽  
Author(s):  
G. G. Savenkov ◽  
V. P. Razinkin ◽  
A. D. Mekhtiev
Keyword(s):  
Frequency Response ◽  
Frequency Band ◽  
High Power ◽  
Two Stage ◽  
High Power Microwave ◽  
Modelling Method ◽  
Optimal Values ◽  
Inductive Elements ◽  
Power Microwave

Applications of modern terminal loads and its relevant disadvantages are described in this paper. The decomposing method of wideband microwave high power microstrip loads design is proposed in this paper with purpose of matching quality improving. Multiple extension of multistage load bandwidth is provided by using of external matching circuit and internal matching inductive elements. The maximum reachable bandwidth of multistage load is estimated and optimal values of mathing circuit elements are founded on basis of equivalent lumped scheme. The topology of microstrip two-stage high power microwave load is developed and its frequency response, calculated via numeric electrodynamic modelling method is outlined in the paper. Modelling results show good matching quality of considered load at the frequency band below 3,5 GHz.

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