Improvement Corrosion Resistance of Gray Cast Iron Grade FC220 on Chromizing Process by Separate Cr Powder and NH4Cl Powder System

2015 ◽  
Vol 799-800 ◽  
pp. 397-401
Author(s):  
Pudsadee Chupong ◽  
Pijan Jornsanoh ◽  
Karuna Tuchinda ◽  
Anantawit Tuchinda
Keyword(s):  
Corrosion Resistance ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
Salt Spray ◽  
Gray Cast ◽  
Experimental Setup ◽  
Micro Hardness ◽  
Powder System ◽  
Iron Grade ◽  
Scanning Electron

A new configuration of chromizing process was developed by separating Cr powder from NH4Cl. FC220 gray cast iron specimens were chromized in this new experimental setup at 450, 550, 650,750, 850 and 950°C during 13 hours in order to study the possibility of chromizing at “low” temperature. The chromized specimens were examined using Scanning Electron Microscopy (SEM), macro-hardness, micro-hardness, compression test and salt spray test. The results shows that the specimen chromized at 650°C gives the best compromise between the corrosion resistance and the hardness of the FC220 with 1.73 ڌm of thickness of the chromized layer. However, after 13 hours of the process, the hardness of the FC220 specimens decreased considerably from 93 HRB to 64.2 HRB (31%).

Cavitation Erosion and Corrosion of Pearlitic Gray Cast Iron in Non-Standardized Cavitation Conditions

2014 ◽  
Vol 225 ◽  
pp. 19-24 ◽  
Author(s):  
Jarosław Chmiel ◽  
Robert Jasionowski ◽  
Dariusz Zasada
Keyword(s):  
Corrosion Resistance ◽  
Cast Iron ◽  
Ethylene Glycol ◽  
Cavitation Erosion ◽  
Gray Cast Iron ◽  
Gray Cast ◽  
Test Environment ◽  
Iron Grade

A results of test of erosion and corrosion resistance of pearlitic gray cast iron (grade EN GJ 400) are showed. The NaCl solutions and of ethylene glycol solutions were used as the test environment. Examination were performed at varying cavitation load, in the range 2,8 ÷ 20 W/cm2.

MEEHANITE GF-20

Alloy Digest ◽  
1973 ◽  
Vol 22 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Shear Strength ◽  
Cast Iron ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Gray Cast Iron ◽  
Heat Treating ◽  
Gray Cast

Abstract MEEHANITE GF-20 is a gray cast iron designed principally for high machinability and is used where strength is not an important factor. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength as well as fracture toughness and fatigue. It also includes information on corrosion resistance as well as casting, heat treating, machining, joining, and surface treatment. Filing Code: CI-39. Producer or source: Meehanite Metal Corporation.

Corrosion Resistance of Nitrided Gray Cast Iron （FC） in Salt Water Environment

2020 ◽  
Vol 69 (12) ◽  
pp. 329-332
Author(s):  
Hisao Fujikawa ◽  
Souhei Nishisaka ◽  
Teruhiko Nishikawa
Keyword(s):  
Corrosion Resistance ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
Salt Water ◽  
Water Environment ◽  
Gray Cast

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.

Mechanical Behaviour of Aluminium Alloy Reinforced with Sic/Fly Ash/Basalt Composite for Brake Rotor

2017 ◽  
Vol 25 (3) ◽  
pp. 203-208 ◽  
Author(s):  
G. Venkatachalam ◽  
A. Kumaravel
Keyword(s):  
Cast Iron ◽  
Fly Ash ◽  
Gray Cast Iron ◽  
Matrix Alloy ◽  
Gray Cast ◽  
Chemical Compositions ◽  
Micro Hardness ◽  
Temperature Oxidation ◽  
Brake Rotor ◽  
Brake Rotors

Gray cast iron is the most commonly used material in automobile brake rotors. It generates heat easily during braking which affects its mechanical properties and the Coefficient of friction varies depending on the type of material used for the brake rotor. Aluminium (Al) based metal matrix composite can be an efficient and effective braking material compared to cast iron and matrix alloy. In the present investigation, Al6082 composites were fabricated by stir casting method by varying weight percentage of reinforcements for Sample1 (Al 90% + SiC 10%), Sample 2 (Al 90% + SiC 5% + fly ash 5%) and Sample 3 (Al 90% + SiC 5% + basalt 5%). Chemical compositions, micro hardness, wear test and tensile test were performed to study the mechanical behavior of all the test specimens. The surface morphology was studied using microscopic inspection to indicate the distribution of reinforcement particles and bonding between the matrixes. Composites containing hard oxides (like SiC) are preferred for high wear resistance along with increased hardness and high temperature oxidation resistance. The result reveals that wear rates of the composite materials is lower than that of the matrix alloy and friction coefficient was minimum. Also, it improves the micro hardness and tensile strength. The addition of fly ash and basalt decreases the wear and it acquired density almost three times lower than that of gray cast iron. In this investigation, the alternate materials for automobile brake rotors with Al reinforced composites were studied.

The Mechanism of Cavitation Erosion

1942 ◽  
Vol 9 (1) ◽  
pp. A31-A37
Author(s):  
T. C. Poulter
Keyword(s):  
Corrosion Resistance ◽  
Cast Iron ◽  
Cavitation Erosion ◽  
Gray Cast Iron ◽  
Protective Coatings ◽  
Gray Cast ◽  
Paraffin Oil ◽  
Water Alcohol

Abstract After pointing out the interrelation between corrosion resistance, caustic embrittlement, fatigue, creep, and other phenomena of metals, the author cites the results of experiments on glass and quartz rods, subjected to high liquid pressures, as indicative of the action which probably occurs in cavitation erosion. To demonstrate the mechanism of cavitation on this basis, an investigation was conducted, in which tests were made on gray-cast-iron specimens in water, alcohol, glycerin, and paraffin oil, using a magnetostriction oscillator as the source of energy. The results of the tests which are reported bear out the theory. Materials and protective coatings which reduce cavitation erosion greatly, and the effect of the presence of hydrogen in the liquid are discussed.

Enhancement of the corrosion resistance of gray cast iron by ion nitriding

2006 ◽  
Vol 42 (6) ◽  
pp. 849-852 ◽  
Author(s):  
O. D. Sokolov ◽  
O. V. Mannapova ◽  
A. I. Kostrzhyts’kyi ◽  
A. P. Olik
Keyword(s):  
Corrosion Resistance ◽  
Cast Iron ◽  
Gray Cast Iron ◽  
Gray Cast ◽  
Ion Nitriding
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