scholarly journals Effect of Nickel Equivalent on Austenite Transition Ratio in Ni-Mn-Cu Cast Iron

2013 ◽  
Vol 13 (2) ◽  
pp. 53-58 ◽  
Author(s):  
A. Janus ◽  
A. Kurzawa
Keyword(s):  
Cast Iron ◽  
Chemical Composition ◽  
Chemical Analysis ◽  
Wall Thickness ◽  
Brinell Hardness ◽  
Austenite Decomposition ◽  
Structural Components ◽  
Microscopy Image ◽  
Image Analyser ◽  
Nickel Equivalent

Abstract Determined was quantitative effect of nickel equivalent value on austenite decomposition degree during cooling-down castings of Ni-Mn- Cu cast iron. Chemical composition of the alloy was 1.8 to 5.0 % C, 1.3 to 3.0 % Si, 3.1 to 7.7 % Ni, 0.4 to 6.3 % Mn, 0.1 to 4.9 % Cu, 0.14 to 0.16 % P and 0.03 to 0.04 % S. Analysed were castings with representative wall thickness 10, 15 and 20 mm. Scope of the examination comprised chemical analysis (including WDS), microscopic observations (optical and scanning microscopy, image analyser), as well as Brinell hardness and HV microhardness measurements of structural components.

Researches Regarding Ti/W/TiC Triple Layers Deposition on the Ferritic-Pearlitic Cast Iron Support, Obtained by Electro-Spark Deposition Method

2013 ◽  
Vol 371 ◽  
pp. 363-367 ◽  
Author(s):  
Carmen Nejneru ◽  
Manuela Cristina Perju ◽  
Mihai Axinte
Keyword(s):  
Cast Iron ◽  
Chemical Composition ◽  
Chemical Analysis ◽  
Layer Thickness ◽  
Surface Quality ◽  
Deposition Method ◽  
Characteristics Analysis ◽  
Part Surface

This paper contains a layer characteristics analysis layer thickness, chemical analysis, surface quality-for the triple deposition with Ti, W and TiC on the ferritic-perlitic cast iron support, using electro-spark deposition method. The resulted surface quality by electro-spark deposition method is dependent by the quality and chemical composition of the electrode. The obtained layer was realized by multiple successive depositions, using different electrodes to combine the beneficial characteristics of the part surface with the appropriate succession.

scholarly journals Influence of Over-Cooling the Nodular Cast Iron to the Graphite Form in the Surface Layer

2012 ◽  
Vol 12 (1) ◽  
pp. 43-46
Author(s):  
M. Hosadyna ◽  
St. Dobosz ◽  
J. Kusiński
Keyword(s):  
Surface Layer ◽  
Cast Iron ◽  
Chemical Composition ◽  
Cooling Rate ◽  
Molten Metal ◽  
Wall Thickness ◽  
Nodular Cast Iron ◽  
Gradient Material ◽  
Physicochemical State

Influence of Over-Cooling the Nodular Cast Iron to the Graphite Form in the Surface Layer A cast iron is gradient material. This means that depending on the cooling rate it is possible, at the same chemical composition and the physicochemical state of molten metal, to obtain material with a different structure. The connection between the wall thickness of the casting and the speed of its cooling expresses the casting module. Along with the module escalation a cooling rate of the casting is reducing what can cause changes of the microstructure and the increased tendency to the crystallization of distorted graphite forms. Inspections of experimental castings from nodular cast iron with different modules were conducted to the graphite form.

The Production of High Density Cast Iron Tubes by Horizontally Continuous Casting

2012 ◽  
Vol 527 ◽  
pp. 3-8
Author(s):  
Stasys Bockus
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Chemical Composition ◽  
Continuous Casting ◽  
Wall Thickness ◽  
Casting Process ◽  
New Technique ◽  
Outer Diameter ◽  
Continuous Casting Process ◽  
A New Technique

In this paper, a new technique to produce cast iron tubes used for liners of auto engines has been developed and examined. The tubes with an outer diameter of 90 mm and a wall thickness of 14 mm were produced massively by horizontally continuous casting. There are the values of casting parameters and constructions of crystallizers recommended for the continuous casting process of cast iron tubes in our paper. The metallographic microstructure, chemical composition and the mechanical properties of the tubes were investigated. The results of our investigations were successfully used for producing cast iron tubes suitable for liners of auto engines.

scholarly journals Effect of Chemical Composition on Structure and Corrosion Resistance of Ni-Mn-Cu Cast Iron

2016 ◽  
Vol 16 (3) ◽  
pp. 59-62 ◽  
Author(s):  
D. Medyński ◽  
A. Janus
Keyword(s):  
Corrosion Resistance ◽  
Cast Iron ◽  
Chemical Composition ◽  
Thermodynamic Stability ◽  
Matrix Structure ◽  
Austenite Transformation ◽  
Hardness Increase ◽  
Small Decline ◽  
Metastable Systems ◽  
Nickel Equivalent

Abstract In the paper, a relationship between chemical composition of Ni-Mn-Cu cast iron and its structure, hardness and corrosion resistance is determined. The examinations showed a decrease of thermodynamic stability of austenite together with decreasing nickel equivalent value, in cast iron solidifying according to both the stable and the metastable systems. As a result of increasing degree of austenite transformation, the created martensite caused a significant hardness increase, accompanied by small decline of corrosion resistance. It was found at the same time that solidification way of the alloy and its matrix structure affect corrosion resistance to a much smaller extent than the nickel equivalent value, in particular concentration of elements with high electrochemical potential.

ALGOMA AR225

Alloy Digest ◽  
2003 ◽  
Vol 52 (12) ◽  
Keyword(s):  
Carbon Steel ◽  
Chemical Analysis ◽  
Physical Properties ◽  
Carbon Content ◽  
Brinell Hardness ◽  
Low Cost ◽  
Heat Treating ◽  
Rolled Plate ◽  
High Carbon ◽  
High Carbon Content

Abstract Algoma AR225 is a carbon steel developed primarily to supply a low-cost material for high-abrasion applications. It is furnished in the form of as-rolled plate with a relatively high carbon content (0.35-0.45%). AR-225 is sold on the basis of chemical analysis only; the number 225 signifies the approximate Brinell hardness. On thicknesses one-half inch and over, this Brinell value may be lower than 225 because of higher finishing temperatures. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, machining, and joining. Filing Code: CS-138. Producer or source: Algoma Steel Corporation Ltd.

The chemical composition of leucoxene in Cainozoic bauxite from Boolarra, Victoria

1942 ◽  
Vol 26 (179) ◽  
pp. 273-274 ◽  
Author(s):  
A. B. Edwards
Keyword(s):  
Chemical Composition ◽  
Chemical Analysis ◽  
Olivine Basalt ◽  
Pure Sample ◽  
Residual Structure ◽  
Aluminium Titanate

During a petrological examination of samples of bauxite from Boolarra, in south Gippsland, Victoria, it was noted that some specimens of the bauxite, which is largely derived from Tertiary olivine-basalt, contained numerous grains of yellow-brown to amber-yellow leucoxene. The leucoxene is clearly pseudo-morphous after ilmenite, residual particles of ilmenite being enclosed in many of the leucoxene grains. Most of the leucoxene grains are opaque, but occasional grains are translucent to transparent, though isotropic. Some of them show parallel markings suggestive of cleavage, but probably a residual structure from the replaced ilmenite. In view of the highly aluminous nature of the enclosing rock, there seemed some possibility that this mineral might be the little-known aluminium titanate, xanthitane. It was thought, therefore, that if a pure sample of the mineral could be prepared, a chemical analysis would establish its identity.

scholarly journals Elementary chemical analysis in leaves infected by fumagina by X-Ray fluorescence technique

2007 ◽  
Vol 50 (5) ◽  
pp. 851-860 ◽  
Author(s):  
Maria Sélia Blonski ◽  
Carlos Roberto Appoloni ◽  
Paulo Sérgio Parreira ◽  
Pedro Henrique Arruda Aragão ◽  
Virgilio Franco Nascimento Filho
Keyword(s):  
Chemical Composition ◽  
Chemical Analysis ◽  
Fluorescence Technique ◽  
Energy Dispersion ◽  
X Ray ◽  
Set Up ◽  
Elementary Chemical ◽  
Cu And Zn

Energy Dispersion X-Ray Fluorescence Technique (EDXRF) was employed to study the effects of the fumagina disease on the elementary chemical composition of the leaves. The experimental set up consisted of a Mo X-ray tube (Ksub<FONT FACE=Symbol>µ</FONT> = 17.44 keV) with Zr filter and a Si (Li) detector. The measurements were performed with the infected and healthy leaves of citric plants. The elements Ti, Mn, Fe, Cu and Zn were quantified, with an average DL of 69, 12, 8, 4 and 4 µg.g-1 respectively. The obtained concentration for Fe varied from 44 to 192 µg.g-1 in healthy leaves and from 363 to 704 µg.g-1 in infected leaves with fumagina .

scholarly journals Hot metal desulfurization by marble waste and fluorspar

2012 ◽  
Vol 65 (2) ◽  
pp. 233-240 ◽  
Author(s):  
Felipe Nylo de Aguiar ◽  
Felipe Fardin Grillo ◽  
Jorge Alberto Soares Tenório ◽  
José Roberto de Oliveira
Keyword(s):  
Chemical Composition ◽  
Chemical Analysis ◽  
Pig Iron ◽  
Hot Metal ◽  
Industrial Mixture ◽  
Desulfurization Process ◽  
Hot Metal Desulfurization ◽  
Vacuum Sampling ◽  
Marble Waste

The objective of this paper is to present an analysis of the use of residual marble mixtures in the pig iron desulfurization process. The study involved the use of: marble waste, fluorspar, lime, and hot metal. Four mixtures were made and added to a liquid hot metal - with known chemical composition - at a temperature of 1450ºC. The mass of each element was calculated from its chemical analysis and compared with an industrial mixture. All of the four mixtures used in the experiments were stirred by a mechanical stirrer. Samples were collected by vacuum sampling for times of 5, 10, 15, 20, and 30 minutes, and analysis was performed to check sulfur variation in the bath with time. The results were analyzed and they verified that it was possible to use marble waste as a desulfurizer.

scholarly journals Characteristics of Graphite Precipitates in Aluminium Cast Iron Treated with Cerium Mixture

2015 ◽  
Vol 15 (1) ◽  
pp. 93-98 ◽  
Author(s):  
M. S. Soiński ◽  
A. Jakubus ◽  
K. Skurka
Keyword(s):  
Cast Iron ◽  
Silicon Content ◽  
Unit Area ◽  
Manganese Content ◽  
Aluminium Content ◽  
Al Content ◽  
Compact Graphite ◽  
Image Analyser ◽  
Average Size ◽  
Area Percentage

Abstract The work determined the influence of aluminium in the amount from about 1% to about 7% on the graphite precipitates in cast iron with relatively high silicon content (3.4% to 3.90%) and low manganese content (about 0.1%). The cast iron was spheroidized with cerium mixture and graphitized with ferrosilicon. The performed treatment resulted in occurring of compact graphite precipitates, mainly nodular and vermicular, of various size. The following parameters were determined: the area percentage occupied by graphite, perimeters of graphite precipitates per unit area, and the number of graphite precipitates per unit area. The examinations were performed by means of computer image analyser, taking into account four classes of shape factor. It was found that as the aluminium content in cast iron increases from about 1.1% to about 3.4%, the number of graphite precipitates rises from about 700 to about 1000 per square mm. For higher Al content (4.2% to 6.8%) this number falls within the range of 1300 - 1500 precipitates/mm2. The degree of cast iron spheroidization increases with an increase in aluminium content within the examined range, though when Al content exceeds about 2.8%, the area occupied by graphite decreases. The average size of graphite precipitates is equal to 11-15 μm in cast iron containing aluminium in the quantity from about 1.1% to about 3.4%, and for higher Al content it decreases to about 6 μm.

Sign in / Sign up

Export Citation Format

Share Document