scholarly journals The Study of Qualities’ Specialties of Cast Iron’s with Different Composition.

2015 ◽  
Vol 2015 (1) ◽  
pp. 20-24 ◽  
Author(s):  
Наталья Жижкина ◽  
Natalya Zhizhkina ◽  
Сергей Ипатов ◽  
Sergey Ipatov
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
High Temperature ◽  
Gray Cast Iron ◽  
Gray Cast ◽  
Flake Graphite ◽  
Cast Irons ◽  
High Level ◽  
Chilled Cast Iron ◽  
Wear Condition

The paper has been devoted to study of white, chilled and gray cast iron. It has been showed that white cast irons’ ingots are characterized by high level of properties. What is why such materials are used at high temperature and wear condition. Carbides’ and granites existence in the structure increase properties of chilled cast iron. Such cast irons are used for details of metallurgical and other branches of industry. Flake graphite in structure of cast iron decreases level of analyzed properties. But ingots of such cast iron showed high values of tensile strength on compression.

ISO 185/JL/350

Alloy Digest ◽  
2021 ◽  
Vol 70 (9) ◽  
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
High Strength ◽  
Heat Treating ◽  
Gray Cast ◽  
Spheroidal Graphite ◽  
Cast Irons ◽  
Test Pieces

Abstract ISO 185/JL/350 is a higher-tensile-strength gray cast iron that has a pearlitic matrix, and a tensile strength of 350–450 MPa (51–65 ksi), when determined on test pieces machined from separately cast, 30 mm (1.2 in.) diameter test bars. It provides a combination of high strength while still maintaining good thermal conductivity compared with other types of cast iron. This grade approaches the maximum tensile strength attainable in gray cast iron. Applications therefore tend to be confined to those where thermal conductivity requirements in service preclude the use of one of the other higher-strength materials such as spheroidal graphite cast irons, which have inferior thermal properties. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on wear resistance as well as casting and heat treating. Filing Code: CI-85. Producer or source: International Organization for Standardization.

Influence of Alloying on the Uniformity of Strength and Structure of Gray Iron

2012 ◽  
Vol 490-495 ◽  
pp. 3348-3352
Author(s):  
Li Li Xiao ◽  
Feng Zhang Ren ◽  
Meng Qi Liu ◽  
Yu Fei Wang ◽  
Na Wen Zhang ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Cutting Force ◽  
Gray Cast Iron ◽  
Brinell Hardness ◽  
Pure Copper ◽  
Gray Iron ◽  
Gray Cast ◽  
Micro Hardness ◽  
Cast Irons

Two gray cast irons with equal tensile strength were prepared to investigate the influence of alloying on the machinability of gray iron. After 75SiFe modifying treatment, they were alloyed by the mixture additive containing RE, Cr, Mn, Si and Fe with a certain proportion and pure copper, respectively. The hardness, section sensitivity, structuralhomogenity and machinability were tested in this experiment. The results show that both of the gray irons have the same brinell hardness and the micro-hardness. The section sensitivity of the gray iron alloyed by the mixture additive is smaller than the gray iron alloyed by copper. The main cutting force of the cast iron alloyed by the mixture additive is lower than that of the cast iron alloyed by copper, therefore, the gray cast iron alloyed by the mixture additive has a better machinability than the cast iron alloyed by copper.

scholarly journals Evolution of the Macrostructure of Gray Cast Iron from Eutectic to Hypereutectic Composition

2018 ◽  
Vol 925 ◽  
pp. 110-117 ◽  
Author(s):  
Marcos López ◽  
Juan M. Massone ◽  
Roberto Enrique Boeri
Keyword(s):  
Cast Iron ◽  
Gray Cast Iron ◽  
Eutectic Reaction ◽  
Liquidus Line ◽  
Nucleating Agent ◽  
Gray Cast ◽  
Carbon Equivalent ◽  
Flake Graphite ◽  
Cast Irons ◽  
Coupled Growth

This work studies the evolution of the macrostructure of gray cast iron as the carbon equivalent (CE) increases from near-eutectic to highly hypereutectic values. The macrostructure of spherical samples of flake graphite irons of CE ranging between 4.24% and 5.23% was revealed by using direct austempering after solidification technique (DAAS). The results were analysed by applying the concept of coupled zone for gray cast irons. The coupled zone is a region in the stable Fe-C-Si diagram in which solidification proceeds as a cooperative growth of both austenite and flake graphite. The coupled zone for gray cast iron is claimed to be asymmetrical as the eutectic reaction is extended towards the prolongation of the austenite liquidus line. All the samples investigated in the present study show the presence of relatively large austenite grains, demonstrating that the number of active nucleation sites of austenite per unit volume is small. The observation of the microstructure shows the presence of several units of coupled growth inside each austenite grain, what proves that many eutectic colonies have grown from the same austenite nucleus, even for highly hypereutectic compositions. Colour etching was employed to reveal the “hidden” dendrites present in the microstructure. The results suggest that proeutectic graphite is not a good nucleating agent for austenite. These results contribute to the understanding of the solidification of hypereutectic gray irons and verify the earlier understanding of the solidification of eutectic gray irons and its extension to hypereutectic compositions.

scholarly journals Fabrication of High-Strength Gray Cast Iron Using Permanent Magnet Scrap

2017 ◽  
Vol 62 (2) ◽  
pp. 1113-1117
Author(s):  
Seung-Yeon Park ◽  
J.H. Kim ◽  
S.J. Seo ◽  
J.S. On ◽  
K.M. Lim
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Permanent Magnet ◽  
High Performance ◽  
Gray Cast Iron ◽  
High Strength ◽  
Cost Effective ◽  
Gray Cast ◽  
Cast Irons ◽  
Cast Specimen

AbstractIn this study, we have developed the manufacturing technology for high strength gray cast irons by using the spent permanent magnet scraps. The cast specimen inoculated by using a spent magnet scraps showed the excellent tensile strength up to 306MPa. This tensile strength value is 50MPa higher than that of the specimen cast without inoculation, and is similar to that of the specimen inoculated by using the expensive misch-metal. These superior mechanical properties are attributed to complex sulfides created during solidification that promote the formation and growth of Type-A graphite. It is therefore concluded that spent magnets scrap can provide an efficient and cost-effective inoculation agent for the fabrication of high-performance gray cast iron.

scholarly journals An Investigation of Effect of Tin (Sn) on Microstructures and Mechanical Properties of Gray Cast Iron

2019 ◽  
Vol 3 (5) ◽  
pp. 21-27
Author(s):  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
Alloying Elements ◽  
Gray Cast ◽  
Ductile Rupture ◽  
Cast Irons ◽  
Brittle Rupture ◽  
Microscopy Images ◽  
Specimen Number

As the tensile strength of gray cast iron is low, it is tried to increase tensile strength by testing various alloying elements. The most preferred of these alloying elements was the copper element. However, it is known that copper increases both hardness and tensile strength by enhancing perlite ratio in microstructure. On the other hand, when tin (Sn) is used in trace amounts compared to copper, it has similar effects on hardness and tensile strength of cast iron. In this study, adding tin element of 0,03-0,06-0,09-0,12-0,15 % by weight in gray cast iron, its effect on tensile strength was investigated and the appearance of the fracture surfaces was examined. It was compared with two different gray cast irons containing 0.4% copper element and free of alloying elements. According to the tensile strength results, the highest tensile strength was observed to be 195 N / mm2 in the specimen number 6 containing 0,12% Sn. The lowest tensile strength was determined as 157 N / mm2 in the specimen number 1 which did not contain alloying elements. In SEM (Scanning Electron Microscopy) images, it is seen that the samples generally exhibit a brittle rupture behaviour. In some of the specimens with the addition of tin and copper, regional ductile rupture behaviours were observed.

Gray Cast Iron Behavior in Cavitation Erosion

2014 ◽  
Vol 782 ◽  
pp. 269-274 ◽  
Author(s):  
Cinca Ionel Lupinca ◽  
Marian Dumitru Nedeloni ◽  
Dorian Nedelcu
Keyword(s):  
Cast Iron ◽  
Cavitation Erosion ◽  
Gray Cast Iron ◽  
Erosion Resistance ◽  
Nodular Cast Iron ◽  
Gray Cast ◽  
Spheroidal Graphite ◽  
Flake Graphite ◽  
Cast Irons ◽  
Cavitation Erosion Resistance

The paper presents the cavitation stand used, the work methodology, the trials realized on specimens of gray cast irons, with flake graphite and spheroidal-graphite, which were tested for cavitation erosion during different periods of time of the cavitation attack. Finally, the conclusions were interpreted on the basis of comparative graphics realized at the macro and microstructures level obtained for these two types of cast iron. Of the two types of gray cast iron, the nodular cast iron presents a better cavitation erosion resistance.

ISO 185/JL/300

Alloy Digest ◽  
2021 ◽  
Vol 70 (6) ◽  
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
High Strength ◽  
Heat Treating ◽  
Gray Cast ◽  
Spheroidal Graphite ◽  
Cast Irons ◽  
Test Pieces

Abstract ISO 185/JL/300 is a higher-tensile-strength gray cast iron that has a pearlitic matrix; it has a tensile strength of 300–400 MPa (44–58 ksi), when determined on test pieces machined from separately cast, 30 mm (1.2 in.) diameter test bars. It provides high strength while still maintaining good thermal conductivity compared with other types of cast iron. This grade approaches the maximum tensile strength attainable in gray cast iron. Applications therefore tend to be confined to those where thermal conductivity requirements in service preclude the use of one of the other higher-strength materials such as spheroidal graphite cast irons, which have inferior thermal properties. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on casting and heat treating. Filing Code: CI-82. Producer or source: International Organization for Standardization.

scholarly journals Effect of Mechanical Vibration on Microstructure and Mechanical Properties of Gray Cast Iron in Lost Foam Casting

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Kai Qiu ◽  
Bota Xiao
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
Mechanical Vibration ◽  
Gray Cast ◽  
Lost Foam Casting ◽  
Flake Graphite ◽  
Microstructure And Properties ◽  
Lost Foam

In order to reveal the effect of vibration solidification on microstructure and properties of gray cast iron in lost foam casting, Y-shaped HT100 gray cast iron was prepared by vibration lost foam casting, and the effect of amplitude on the microstructure and properties of gray cast iron was studied. The results showed that, with the increase in amplitude, the short and thin A-type flake graphite increases, and the austenite structure transforms from columnar to cellular. The hardness, tensile strength, and elongation of gray cast iron first increase and then decrease with the increase in amplitude. The appropriate amplitude in the process of Y-shaped HT100 gray cast iron by lost foam casting is 2 mm, while the tensile strength and elongation of gray cast iron are the highest, with the values of 147.51 MPa and 1.17%, respectively. The change of mechanical properties of gray cast iron is mainly determined by the morphology and distribution of austenite in gray cast iron and A-type flake graphite.

ISO 185/JL/225

Alloy Digest ◽  
2020 ◽  
Vol 69 (9) ◽  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
Heat Treating ◽  
International Organization ◽  
Gray Cast ◽  
Damping Capacity ◽  
Lower Strength ◽  
Test Pieces ◽  
Lower Carbon

Abstract ISO 185/JL/225 is an intermediate-tensile-strength gray cast iron that has a predominantly pearlitic matrix, and a tensile strength of 225–325 MPa (33-47 ksi), when determined on test pieces machined from separately cast, 30 mm (1.2 in.) diameter test bars. Compared with the lower strength gray cast iron grades, ISO 185/JL/225 contains lower carbon and silicon contents, while still maintaining excellent thermal conductivity, damping capacity, and machinability. This datasheet provides information on composition, physical properties, tensile properties, and compressive strength as well as fatigue. It also includes information on heat treating. Filing Code: CI-73. Producer or source: International Organization for Standardization (ISO).

MEEHANITE GC275

Alloy Digest ◽  
2021 ◽  
Vol 70 (2) ◽  
Keyword(s):  
Tensile Strength ◽  
Cast Iron ◽  
Physical Properties ◽  
Tensile Properties ◽  
Gray Cast Iron ◽  
Heat Treating ◽  
Gray Cast ◽  
Strength Grade ◽  
Test Pieces

Abstract Meehanite GC275 is a pearlitic gray cast iron that has a minimum tensile strength of 275 MPa (40 ksi) when determined on test pieces machined from separately cast, 30 mm (1.2 in.) diameter, test bars. This intermediate-tensile-strength grade has a fine, close-grained structure that is ideal for finishing cuts. It is used for a wide variety of applications on account of its useful combination of good all round properties with adaptability to production of small and large volumes. This datasheet provides information on physical properties, hardness, and tensile properties as well as fatigue. It also includes information on heat treating, machining, and joining. Filing Code: CI-78. Producer or source: Meehanite Metal Corporation.

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