scholarly journals Study of Factors Affecting Tensile Strength of Grey Cast Iron

2021 ◽  
Vol 23 (11) ◽  
pp. 759-768
Author(s):  
Abhijit Ramesh Patil ◽  
◽  
P. N. Gore ◽  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Tensile Force ◽  
Grey Cast Iron ◽  
Steel Scrap ◽  
Factors Affecting ◽  
Graphite Morphology ◽  
Grey Cast ◽  
Clear Idea ◽  
High Temperature Tensile

Tensile strength of a material is the capacity of material to withstand tensile force without failure. Tensile strength is important mechanical property of material which gives direction to use it for proposed application safely. It is very important parameter considered in designing sound product. Grey cast iron carries properties like high compressive strength, castable, good machinability, good abrasion resistance, high thermal conductivity, resist to expand under high temperature. Tensile strength of grey cast depends mainly on carbon content, steel scrap % used, inoculation, graphite morphology, cooling time. Present paper summarizes study of factors affecting tensile strength of grey cast iron. With the study of factors affecting the tensile strength of cast iron it is very helpful to achieve required tensile strength by controlling the factors affecting strength of the material. While studying and experimenting on the behavior of tensile strength, clear idea comes into the picture how the strength is affected.

Inoculating Influence of Re-Carburizers in Grey Cast Iron

2007 ◽  
Vol 23 ◽  
pp. 287-290
Author(s):  
Iulian Riposan ◽  
Mihai Chisamera ◽  
Stelian Stan ◽  
P. Toboc
Keyword(s):  
Cast Iron ◽  
Carbon Materials ◽  
Analysis Data ◽  
Grey Cast Iron ◽  
Cast Irons ◽  
Graphite Morphology ◽  
Grey Cast ◽  
The Difference ◽  
Solidification Parameters ◽  
Potential Carbon

In laboratory experiments Thermal Analysis data were recorded and different solidification parameters were identified to characterize the inoculation effect of the carbon materials (amorphous and crystalline structure) in low sulphur (<0.025 %S) grey cast iron. These parameters are linked to graphite morphology as well as chill formation in carburized cast irons. In low sulphur base iron the difference in inoculation efficiency between crystalline and amorphous carbon materials is limited. Secondary granular carbon materials, previously used as conductive or resistive media in electric graphitizing furnaces were found to be potential carbon raisers with visible inoculation effects in grey irons, especially those from a petroleum coke origin. A controlled presence of a low amount of SiC (2-3%) is effective, including low sulphur grey irons.

Heredity of the Structure and Properties of Grey Cast Iron Melted on a Basis of Steel Scrap

2012 ◽  
Vol 622-623 ◽  
pp. 685-689 ◽  
Author(s):  
Krzysztof Janerka ◽  
Jan Jezierski ◽  
Dariusz Bartocha ◽  
Jan Szajnar
Keyword(s):  
Cast Iron ◽  
Quantitative Analysis ◽  
Grey Cast Iron ◽  
Steel Scrap ◽  
Pig Iron ◽  
Structure And Properties ◽  
Charge Materials ◽  
Grey Cast ◽  
Synthetic Graphite ◽  
Natural And Synthetic

In this paper are presented the results of researches, obtained during cast iron melting on basis of steel scrap and a carburizer (without pig iron in solid charge). In the process of carburization, there were used the carburizers such as anthracite, natural and synthetic graphite, petroleum and cupola coke, as well as charcoal. The grey cast iron was produced, for which quantitative analysis of graphite precipitations was performed. It was noticed that in case of using anthracite as carburizer, the smaller graphite precipitations were obtained. In authors’ opinion they are consequences of anthracite structure, consisted of fine graphite flakes and phenomenon of charge materials features’ transfer into melted alloys (structure heredity).

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.

scholarly journals Mechanical characterization of precipitation hardened Al7075-grey cast iron powder reinforced metal matrix composites

2018 ◽  
Vol 144 ◽  
pp. 02007 ◽  
Author(s):  
Jamaluddin Hindi ◽  
Kini Achuta ◽  
Murthy Amar
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Aging Temperature ◽  
Stir Casting ◽  
Grey Cast Iron ◽  
Age Hardening ◽  
Casting Technique ◽  
Specific Strength ◽  
Grey Cast

Al7075 alloy is the most commonly used by the aerospace industry. Al7075 alloy is characterized by its improved properties such as higher toughness, specific strength and hardness. The current work focuses on the preparation and characterization of age hardened Al7075-Grey cast iron composites. Two stage stir casting technique is used for the preparation of the composite. Age hardening treatment is imparted to enhance the mechanical characteristics. The variation of hardness and tensile strength with respect to aging temperature and percentage of reinforcement is analyzed. The composites exhibit higher hardness and tensile strength as the reinforcement percentage is increased at an aging temperature of 100°C.

scholarly journals Auto-analysis system for graphite morphology of grey cast iron

2003 ◽  
Vol 25 (4) ◽  
pp. 87-92 ◽  
Author(s):  
Hong Jiang ◽  
Yiyong Tan ◽  
Zelan Zhang ◽  
Jiming Hu ◽  
Junfeng Lei ◽  
...  
Keyword(s):  
Cast Iron ◽  
Grey Cast Iron ◽  
Graphite Morphology ◽  
Grey Cast ◽  
Analysis System

High-damping-capacity Grey Cast Iron with a Tensile Strength of 200 MPa

Cast Metals ◽  
1990 ◽  
Vol 3 (1) ◽  
pp. 49-53 ◽  
Author(s):  
Shin-inchi Hatano ◽  
Tutomu Matsuda ◽  
Tasio Okamoto ◽  
Ken'ichi Matsushita
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Grey Cast Iron ◽  
Damping Capacity ◽  
Grey Cast

scholarly journals The Influence of Undercooling DT on the Structure and Tensile Strength of Grey Cast Iron

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6682
Author(s):  
Józef Dorula ◽  
Dariusz Kopyciński ◽  
Edward Guzik ◽  
Andrzej Szczęsny ◽  
Daniel Gurgul
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cast Iron ◽  
Great Influence ◽  
Small Mass ◽  
Grey Cast Iron ◽  
Primary Austenite ◽  
Grey Cast ◽  
Austenite Grains ◽  
Mutual Relations

Inoculation of cast iron has become a commonly used metallurgical process, which is carried out in a foundry in order to improve the mechanical properties of utility alloys. It consists in changing the physicochemical state of the melted alloy. This change is caused by the introduction of cast iron with a low ability to nucleate graphite, shortly before pouring a small mass of the substance—an inoculant that increases the number of active nuclei. It is also justified that the literature often connects an increase in the tensile strength UTS of the inoculated grey cast iron, with changes in the characteristics of the particles of graphite. However, in strongly hypoeutectic cast iron, in which a large number of primary austenite grains crystallize, the interdendritic distribution of graphite is usually the result. It also follows that the nature of the graphite precipitates is determined by the mutual relations between the interfacial distances in eutectic grains and the interdendritic distances in the grains of primary austenite occurring in the Fe–C alloys. The article presents the influence of the inoculant on the characteristics of the precipitation of primary austenite grains in relation to the sulphur content in grey cast iron with flake graphite. The study also showed that primary grains in grey cast iron have a great influence on mechanical properties, such as the tensile strength UTS. In this case, the key is to know the value of the degree of undercooling DT. The type of inoculant used affects the DT value. The study related the number of N primary austenite grains with the degree of undercooling DT and the tensile strength UTS with the number of primary austenite N grains.

scholarly journals The Effects of Austempered and Quenched & Tempered on Mechanical Properties of Alloyed Grey Cast Iron

2018 ◽  
Vol 7 (4.12) ◽  
pp. 376
Author(s):  
Bulan Abdullah ◽  
Khalissah Yusof ◽  
Farahn Zamri, Nor ◽  
Hayati Saad
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cast Iron ◽  
Room Temperature ◽  
Salt Bath ◽  
Optical Microscope ◽  
Grey Cast Iron ◽  
Engine Oil ◽  
Heat Treated ◽  
Grey Cast

In this study, the effects of austempered and quenched & tempered on mechanical properties of grey cast iron with and without the addition of niobium were investigated. The austempering heat treatment started by heating the samples to an austenitizing temperature of 900°C with a soaking time of 90 minutes before quenched in salt bath furnace with a temperature of 360°C and hold for 180 minutes before it been cooled down to room temperature. The quench and tempering process started with heating the samples at 910°C and hold for 33 minutes. Then the samples are quenched by using engine oil before being heated up again to temperature of 400°C with soak time up to 17 minutes before allow it to be cooled at room temperature. The tests conducted include hardness, tensile and impact test. The microstructure of the samples was observed using optical microscope. The fracture surface of the test tensile and impact specimens was analyzed by using S.E.M. observation. The hardness of the as-cast, austempered and quenched & tempered alloyed grey cast iron are higher compared to the hardness of pure grey cast iron. By addition of Niobium, the tensile strength of the grey cast iron increased by 67.49 % compared to pure grey iron. Tensile strength and elongation of the alloyed grey cast iron slightly increased after heat treated. Austempered alloyed grey cast iron resulted the highest value of impact toughness (6.5 J) compared to other specimens. This showed that austempered alloy grey cast iron is the best in absorbing the energy subjected to it.  

scholarly journals Auto-analysis system for graphite morphology of grey cast iron

2003 ◽  
Vol 25 (4) ◽  
pp. 87-92 ◽  
Author(s):  
Hong Jiang ◽  
Yiyong Tan ◽  
Junfeng Lei ◽  
Libo Zeng ◽  
Zelan Zhang ◽  
...  
Keyword(s):  
Cast Iron ◽  
Quantitative Analysis ◽  
Texture Features ◽  
Current Method ◽  
Empirical Method ◽  
Grey Cast Iron ◽  
Node Number ◽  
Graphite Morphology ◽  
Different Types ◽  
Grey Cast

The current method to classify graphite morphology types of grey cast iron is based on traditional subjective observation, and it cannot be used for quantitative analysis. Since microstructures have a great effect on the mechanical properties of grey cast iron and different types have totally different characters, six types of grey cast iron are discussed and an image-processing software subsystem that performs the classification and quantitative analysis automatically based on a kind of composed feature vector and artificial neural network (ANN) is described. There are three kinds of texture features: fractal dimension, roughness and two-dimension autoregression, which are used as an extracted feature input vector of ANN classifier. Compared with using only one, the checkout correct precision increased greatly. On the other hand, to achieve the quantitative analysis and show the different types clearly, the region segmentation idea was applied to the system. The percentages of the regions with different type are reported correctly. Furthermore, this paper tentatively introduces a new empirical method to decide the number of ANN hidden nodes, which are usually considered as a difficulty in ANN structure decision. It was found that the optimum hidden node number of the experimental data was the same as that obtained using the new method.

Sign in / Sign up

Export Citation Format

Share Document