A Study of the Shrinkage and Dilatation during Solidification of Nodular Cast Iron - its Relation to the Morphology of Crystallisation

1984 ◽  
Vol 34 ◽  
Author(s):  
R. Hummer
Keyword(s):  
Cast Iron ◽  
Nodular Cast Iron ◽  
Operating Conditions ◽  
Cooling Curves ◽  
The Real ◽  
Solidification Behaviour ◽  
Feeding Technique ◽  
Nodular Graphite

ABSTRACTThis study deals with the solidification behaviour of cast iron with nodular graphite. By measurement of the “apparent shrinkage” the real feeding requirement can be determined under operating conditions. By means of cooling curves and measurements of dilatation the mode of solidification is established. The results are in accordance with today's knowledge of the morphology of crystallisation and offer an operating hypothesis for feeding technique in practice.

Computer Simulation of Solidification of Nodular Cast Iron

1984 ◽  
Vol 34 ◽  
Author(s):  
Kou-Chang Su ◽  
Itsuo Ohnaka ◽  
Isamu Yamauchi ◽  
Tatsuichi Fukusako
Keyword(s):  
Computer Simulation ◽  
Cast Iron ◽  
Size Distribution ◽  
Growth Model ◽  
Nodular Cast Iron ◽  
Cooling Curves ◽  
Iron Casting ◽  
Nodular Iron ◽  
Diffusion Controlled ◽  
And Diffusion

ABSTRACTSolidification of a nodular iron casting was simulated by an undercooling nucleation and diffusion controlled growth model. Simulated cooling curves were similar to measured ones but estimating nodular size distribution requires improving the model.

scholarly journals Analysis of Cooling Curves of Nodular Cast Iron

2018 ◽  
Vol 2 (1) ◽  
pp. 1 ◽  
Author(s):  
Marianna Bartošová ◽  
Alena Pribulová ◽  
Štefan Eperješi ◽  
Peter Futáš
Keyword(s):  
Cast Iron ◽  
Nodular Cast Iron ◽  
Cooling Curves

scholarly journals Cellular Automaton Simulation For Volume Changes Of Solidifying Nodular Cast Iron

2015 ◽  
Vol 60 (3) ◽  
pp. 2379-2384 ◽  
Author(s):  
A. Burbelko ◽  
D. Gurgul ◽  
E. Guzik ◽  
W. Kapturkiewicz
Keyword(s):  
Cast Iron ◽  
Cellular Automaton ◽  
Weighted Average ◽  
Nodular Cast Iron ◽  
Phase Volume ◽  
Volume Changes ◽  
Phase Density ◽  
Concentration Changes ◽  
Nodular Graphite ◽  
2D Space

AbstractVolume changes of the binary Fe-C alloy with nodular graphite were forecast by means of the Cellular Automaton Finite Differences (CA-FD) model of solidification. Simulations were performed in 2D space for differing carbon content. Dependences of phase density on temperature were considered in the computations; additionally density of the liquid phase and austenite were deemed as a function of carbon concentration. Changes of the specific volume were forecast on the base of the phase volume fractions and changes of phase density. Density of modeled material was calculated as weighted average of densities of each phase.

Microstructures and Properties of Bainitic Nodular Cast Iron Treated by Controlled Cooling and Austempering Treatment

2010 ◽  
Vol 152-153 ◽  
pp. 259-262
Author(s):  
Ke Gao Liu ◽  
Ai Min Xu ◽  
Dong Xiang ◽  
Bin Xu
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Elevated Temperatures ◽  
Nodular Cast Iron ◽  
Lower Bainite ◽  
Salt Bath ◽  
Controlled Cooling ◽  
Electric Oven ◽  
Upper Bainite ◽  
Nodular Graphite

The mixed structures of bainite matrix, austenite and nodular graphite were obtained in nodular cast iron treated by controlled cooling and austempering in electric oven instead of nitrate salt bath. The relations between bainitic morphology and mechanical properties were investigated. Experimental results show that, the nodular cast iron treated by controlled cooling in water bath and austempering has microstructures of upper bainite and austenite, the mechanical properties fluctuate greatly due to its relatively narrow temperature region in processing. The consistency of mechanical properties of lower bainite nodular cast iron is superior to upper bainite nodular cast iron. The comprehensive mechanical properties of lower bainite nodular cast iron are improved by tempering. However, the brittleness increases greatly when martensite appears in mixed structures, while good mechanical properties can still be obtained by tempering at elevated temperatures.

scholarly journals Effect of the Annealing Temperature on the Microstructure and Properties of Ausferritic Nodular Cast Iron

2016 ◽  
Vol 16 (3) ◽  
pp. 43-48 ◽  
Author(s):  
G. Gumienny ◽  
L. Klimek ◽  
B. Kurowska
Keyword(s):  
Heat Treatment ◽  
Cast Iron ◽  
Impact Strength ◽  
Lamellar Structure ◽  
Annealing Temperature ◽  
Nodular Cast Iron ◽  
Iron Matrix ◽  
Secondary Carbides ◽  
Nodular Graphite ◽  
The Impact

Abstract The paper presents the microstructure and selected properties of ausferritic nodular cast iron annealed at the temperature 520 and 550°C. This choice was dictated by the temperatures used in the practice of nitriding. Nodular graphite in cast iron was obtained with use of Inmold process. Cast iron containing molybdenum and copper ensuring obtaining an ausferrite in the cast iron matrix without the use of heat treatment of castings was tested. The effect of annealing temperature on the microstructure and the kind of fracture of the ausferritic nodular cast iron was presented. The effect of an annealing temperature on hardness, impact strength and the microhardness of ausferritic nodular cast iron matrix was shown too. The lamellar structure of phases in the cast iron matrix after annealing has been ascertained. There has been an increase in hardness of an annealed cast iron and microhardness of its matrix. The reduction in the impact strength of the cast iron annealed at 520 and 550°C was approximately 10-30%. Both an increase in the hardness of cast iron as well as an decrease in its impact strength is probably due to the separation of secondary carbides during the heat treatment.

scholarly journals PENGARUH PENAMBAHAN NIKEL TERHADAP KEKUATAN TARIK DAN KEKERASAN PADA BESI TUANG NODULAR 50

2017 ◽  
Vol 8 (2) ◽  
pp. 41
Author(s):  
Sudarmanto Sudarmanto
Keyword(s):  
Cast Iron ◽  
New Technologies ◽  
Low Cost ◽  
Nodular Cast Iron ◽  
Experimental Results ◽  
Base Metals ◽  
Spherical Structure ◽  
Properties Of Materials ◽  
Nodular Graphite

Nodular cast iron is the cast iron that has nodular graphite spherical structure distributed in ferrite or pearlite matrix or in both of them. Recently, this material is used widely in industries because its low cost and better performance. The advanced metal industries nowadays have found some new technologies in order to improve the properties of materials. One of them is the addition of another elements into the base metals, such as nickel. The effects of the addition 1wt %, 2wt % and 3wt % nickel into nodular cast iron 50 on tensile and hardness properties were investigated in this study. The experimental results show that the best amount of nickel that added into nodular cast iron is 3% wt, which has the best tensile and hardness properties

Power Test System Development and Dynamic Performance State Estimation Based on Hub Motor Vehicle

2020 ◽  
Vol 13 (2) ◽  
pp. 126-140
Author(s):  
Jing Gan ◽  
Xiaobin Fan ◽  
Zeng Song ◽  
Mingyue Zhang ◽  
Bin Zhao
Keyword(s):  
Real Time ◽  
Dynamic Performance ◽  
Test System ◽  
Operating Conditions ◽  
Motor Vehicles ◽  
Maximum Speed ◽  
Performance Parameters ◽  
Power Performance ◽  
Power Test ◽  
The Real

Background: The power performance of an electric vehicle is the basic parameter. Traditional test equipment, such as the expensive chassis dynamometer, not only increases the cost of testing but also makes it impossible to measure all the performance parameters of an electric vehicle. Objective: A set of convenient, efficient and sensitive power measurement system for electric vehicles is developed to obtain the real-time power changes of hub-motor vehicles under various operating conditions, and the dynamic performance parameters of hub-motor vehicles are obtained through the system. Methods: Firstly, a set of on-board power test system is developed by using virtual instrument (Lab- VIEW). This test system can obtain the power changes of hub-motor vehicles under various operating conditions in real-time and save data in real-time. Then, the driving resistance of hub-motor vehicles is analyzed, and the power performance of hub-motor vehicles is studied in depth. The power testing system is proposed to test the input power of both ends of the driving motor, and the chassis dynamometer is combined to test so that the output efficiency of the driving motor can be easily obtained without disassembly. Finally, this method is used to carry out the road test and obtain the vehicle dynamic performance parameters. Results: The real-time current, voltage and power, maximum power, acceleration time and maximum speed of the vehicle can be obtained accurately by using the power test system in the real road experiment. Conclusion: The maximum power required by the two motors reaches about 9KW, and it takes about 20 seconds to reach the maximum speed. The total power required to maintain the maximum speed is about 7.8kw, and the maximum speed is 62km/h. In this article, various patents have been discussed.

Effective properties of nodular cast-iron: A multi-scale computational approach

2014 ◽  
Vol 82 ◽  
pp. 378-390 ◽  
Author(s):  
F.D. Carazo ◽  
S.M. Giusti ◽  
A.D. Boccardo ◽  
L.A. Godoy
Keyword(s):  
Cast Iron ◽  
Effective Properties ◽  
Nodular Cast Iron ◽  
Computational Approach ◽  
Multi Scale
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