Effect of rare earth alloy modification on high carbon equivalent gray cast iron of automotive brake drum

2012 ◽  
Vol 27 (4) ◽  
pp. 725-729 ◽  
Author(s):  
Daowen Zhang ◽  
Zhu Li ◽  
Ji Huang
Keyword(s):  
Rare Earth ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
Gray Cast ◽  
Carbon Equivalent ◽  
High Carbon ◽  
Rare Earth Alloy ◽  
Brake Drum ◽  
Automotive Brake

Microstructure and Properties of High Carbon Equivalent Gray Cast Iron Modified by Rare Earth

2011 ◽  
Vol 295-297 ◽  
pp. 962-968
Author(s):  
Fu Min Chu ◽  
Xin Hui Zu ◽  
Zhong Kui Zhao ◽  
Xiao Yun Jiang
Keyword(s):  
Rare Earth ◽  
Cast Iron ◽  
Rare Earth Metal ◽  
Gray Cast Iron ◽  
Earth Metal ◽  
Gray Cast ◽  
Carbon Equivalent ◽  
High Carbon ◽  
Microstructure And Properties ◽  
The Rare Earth

Microstructure and properties of the high carbon equivalent gray cast iron modified by the rare earth metal are investigated by optical microscopy, scanning electronic microscopy, Brinell hardness and tensile testing. The results show that the primary austenite dendritic is refined, and the morphology of graphite is transformed from A-type to D-type undercooling graphite with increment of the rare earth metal (REM), even with the vermicular graphite present. The lamellae are becoming thinner with increment of rare earth metal. There are double peaks between the addition of the rare earth metal and the tensile strength/hardness. The iron would have the best comprehensive property when 0.30% REM is added.

Effect of Rolling Process on Microstructure and Wear Properties of High Carbon Equivalent Gray Cast Iron

2021 ◽  
Vol 36 (6) ◽  
pp. 903-910
Author(s):  
Yihong Zhao ◽  
Qianyu Chen ◽  
Zhiwei Zheng ◽  
Pei Cao ◽  
Ziyu Gong ◽  
...  
Keyword(s):  
Cast Iron ◽  
Gray Cast Iron ◽  
Rolling Process ◽  
Gray Cast ◽  
Carbon Equivalent ◽  
High Carbon ◽  
Wear Properties

SOME RARE EARTH CONTAINING INOCULANTS FOR GRAY CAST IRON

1985 ◽  
pp. 1370-1374
Author(s):  
Xiong Guoqing ◽  
Guo Xinqing ◽  
Yu Guomei ◽  
Zhao Qinglu
Keyword(s):  
Rare Earth ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
Gray Cast

scholarly journals Evaluation of the Mechanical Properties of Gray Cast Iron Using Electrical Resistivity Measurement

2016 ◽  
Vol 16 (4) ◽  
pp. 29-32 ◽  
Author(s):  
M. Bieroński ◽  
O. Krasa ◽  
M. Koza ◽  
D. Ksiąźek ◽  
R. Kuś
Keyword(s):  
Tensile Strength ◽  
Electrical Resistivity ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
Gray Cast ◽  
Carbon Equivalent ◽  
Electrical Resistivity Measurement ◽  
Regression Equations ◽  
Power Functions ◽  
The Relationship

Abstract In this paper an attempt to determine the relationship between the electrical resistivity and the tensile strength and hardness of cast iron of carbon equivalent in the range from 3.93% to 4.48%. Tests were performed on the gray cast iron for 12 different melts with different chemical composition. From one melt poured 6 samples. Based on the study of mechanical and electro-resistive determined variation characteristics of tensile strength, hardness and resistivity as a function of the carbon equivalent. Then, regression equations were developed as power functions describing the relationship between the resistivity of castings and their tensile strength and hardness. It was found a high level of regression equations to measuring points, particularly with regard to the relationship Rm=f(ρ). The obtained preliminary results indicate the possibility of application of the method of the resistance to rapid diagnostic casts on the production line, when we are dealing with repeatable production, in this case non variable geometry of the product for which it has been determinated before a regression equation.

Oxidation resistance and growth resistance of gray cast iron modified with alkaline-earth and rare-earth elements

1980 ◽  
Vol 22 (4) ◽  
pp. 297-298 ◽  
Author(s):  
I. N. Ganiev ◽  
T. A. Li ◽  
A. V. Vakhobov ◽  
V. I. Asanov
Keyword(s):  
Rare Earth ◽  
Cast Iron ◽  
Rare Earth Elements ◽  
Oxidation Resistance ◽  
Alkaline Earth ◽  
Gray Cast Iron ◽  
Gray Cast

Effect of Alloying Elements on Thermal Diffusivity of Gray Cast Iron Used in Automotive Brake Disks

2009 ◽  
Vol 18 (7) ◽  
pp. 980-984 ◽  
Author(s):  
O. Maluf ◽  
M. Angeloni ◽  
D.B.V. Castro ◽  
W.W. Bose Filho ◽  
D. Spinelli ◽  
...  
Keyword(s):  
Cast Iron ◽  
Thermal Diffusivity ◽  
Gray Cast Iron ◽  
Alloying Elements ◽  
Gray Cast ◽  
Automotive Brake ◽  
Effect Of Alloying

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 Effects of Inoculation on the Pearlitic Gray Cast Iron with High Thermal Conductivity and Tensile Strength

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 1876 ◽  
Author(s):  
Guiquan Wang ◽  
Xiang Chen ◽  
Yanxiang Li ◽  
Zhongli Liu
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
High Thermal Conductivity ◽  
Gray Cast ◽  
Carbon Equivalent ◽  
Metallographic Analysis ◽  
Structure And Properties ◽  
Nucleation Sites

With the aim of improving the thermal conductivity and tensile strength of pearlitic gray cast iron, the influence of inoculation on structure and properties was experimentally investigated. Three group of irons with similar compositions were inoculated by Zr-FeSi, Sr-FeSi, and SiC inoculants, respectively. The metallographic analysis was used to measure the maximum graphite length, primary dendrites amount and eutectic colonies counts. For a certain carbon equivalent, it was confirmed that the thermal conductivity of pearlitic gray cast iron has a direct correlation with the maximum graphite length while the tensile strength was influenced mainly by the primary dendrites amount. The optimal structure and highest thermal conductivity and tensile strength were obtained by Sr-FeSi inoculant. MnS particles act a pivotal part in modifying the structure of gray cast iron. It was found that providing nucleation sites both for graphite and primary austenite is important to promote the thermal conductivity and strength. However, excessive nuclei (MnS particles) results in shorter graphite flakes and thus the depressive growth of primary dendrites.

scholarly journals Thermomechanical and Isothermal Fatigue Behavior of Gray Cast Iron for Automotive Brake Discs

10.5772/13970 ◽  
2011 ◽  
Author(s):  
Omar Maluf ◽  
Jeferson Aparecido ◽  
Mauricio Angeloni ◽  
Marco Antonio ◽  
Jose Carlos ◽  
...  
Keyword(s):  
Cast Iron ◽  
Gray Cast Iron ◽  
Fatigue Behavior ◽  
Gray Cast ◽  
Isothermal Fatigue ◽  
Brake Discs ◽  
Automotive Brake
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