scholarly journals Mechanical properties of ductile cast iron relation to the charge elements

2021 ◽  
Vol 1199 (1) ◽  
pp. 012022
Author(s):  
H Pacha-Gołębiowska ◽  
W Piekarska
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Spectroscopic Studies ◽  
Ductile Cast Iron ◽  
Cooling Curve ◽  
Cast Irons ◽  
Alloying Additives ◽  
Chunky Graphite ◽  
Alloy Cast Iron ◽  
Alloy Cast

Summary In many recent publications on the optimisation of alloys in terms of, among other things, their strength and resistance to wear, a trend can be observed to look for new alloying additives to improve these properties. This paper presents the results of a study on the effect of changes in the chemical composition of EN-GJS-500-7 ductile alloy cast iron on its mechanical properties. In order to confirm the effect of alloying additives on the mechanical properties of the alloys, industrial melting of cast iron was carried out and samples were taken for testing. The smelts were not subjected to heat treatment, but were carried out differently in terms of the feedstock used and based on the analysis of the cooling curve using an automated smelting technology enabling the elimination of degraded Chunky graphite. The influence of the shape of graphite precipitates on tensile strength and hardness was determined, and spectroscopic studies of the microstructure of cast irons were carried out.

Influence of Ca-Ba and Sr Base Inoculants on Metallurgical and Mechanical Properties of Grey and Ductile Cast Irons

2018 ◽  
Author(s):  
Dhruv Patel ◽  
Devendra Parmar ◽  
Siddharthsinh Jadeja
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Uniform Distribution ◽  
Ductile Cast Iron ◽  
Grain Structure ◽  
Spheroidal Graphite ◽  
Primary Carbide ◽  
Cast Irons ◽  
Melt Temperature ◽  
Nodular Graphite

Microstructural adaptation of cast iron alloys by inoculation is a well-known practice to swell their mechanical properties. In foundries, several inoculants have been used to refine grain structure, and to obtain uniform distribution of graphite flakes. Inoculation is one of the most critical steps in cast iron production. The effectiveness of inoculants depends on melt temperature, method of addition, type of inoculants, and holding time. In this paper, the effect of Ca-based, Ba-based, Ca-Ba based and Sr-based inoculants on microstructure and tensile properties of grey cast iron IS-210 and spheroidal graphite iron IS-1862 is reported. Results showed both Ca and Ba based inoculants were effective in obtaining uniform distribution of flaky and nodular graphite in IS-210, and IS-1862 cast irons, respectively. But in a case of Sr-based inoculant were highly effective for increase the nodularity of SG cast iron as well as succeed supreme yield strength for both grey and ductile cast iron. The amounts of ferrite in the as-cast matrix are excess with controlled granulometry for elimination of primary carbide in Sr-based inoculant.

Investigation of Stress Field and Wear Depth of Cr-Mo-Cu Alloy Cast Iron with Nano-Additives under Abrasive Wear

2012 ◽  
Vol 580 ◽  
pp. 539-543
Author(s):  
Chao Hui Wang ◽  
You Wang ◽  
Zhao Yi Pan ◽  
Xiao Hua Gu ◽  
Sheng Xiao Li
Keyword(s):  
Cast Iron ◽  
Aspect Ratio ◽  
Stress Field ◽  
Wear Depth ◽  
Cast Irons ◽  
Cu Alloy ◽  
Graphite Morphology ◽  
Nano Additives ◽  
Alloy Cast Iron ◽  
Alloy Cast

The finite element method (FEM) was used to simulate the sliding wear progress. The stress field and strain field of Cr-Mo-Cu alloy cast iron with nano-additives under wear abrasion were analyzed through experiment and numerical investigation in this paper. And then the wear depth was got by calculation for different alloy cast irons by taking graphite morphology into account. The graphite morphology was changed by addition of nano-additives, with the aspect ratio of graphite was transformed from 2 to 10, three kinds of graphite aspect ratio prepared including 2, 5 and 10.

Mechanical Properties and Thermal Expansion Characteristics of Low Thermal Expansion Ductile Cast Iron with same Nickel Equivalent (NiE)

2010 ◽  
Vol 457 ◽  
pp. 380-385
Author(s):  
Minoru Hatate ◽  
Tohru Nobuki ◽  
Shoji Kiguchi ◽  
Kazumichi Shimizu
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Thermal Expansion ◽  
Cast Iron ◽  
Coefficient Of Thermal Expansion ◽  
Solution Treatment ◽  
Ductile Cast Iron ◽  
High Dimensional ◽  
Cast Irons ◽  
Low Thermal Expansion

Low thermal expansion ductile cast iron is expected to become a new structural material with high dimensional stability against temperature change. We tried to develop a new low thermal expansion ductile cast iron by means of adding C and Si to Superinver alloy. In this study we prepared four kinds of ductile cast irons whose Co contents vary from 0% to 12 %, and investigated about the effects of Co content and solution-treatments on several main characteristics such as coefficient of thermal expansion and mechanical properties. The results obtained are as follows: With increase of Co content the amount of martensite increases but this martensite can be inverse-transformed to austenite totally or greatly by solution-treatment followed with water-quenching. In the case of Co content less than some 9 % the ability of relatively larger plastic deformation can be expected in inverse-transformed austenite.

Research on Wear Performance of Nano-Additives Cr-Mo-Cu Alloy Cast Iron

2012 ◽  
Vol 580 ◽  
pp. 485-488
Author(s):  
Chao Hui Wang ◽  
Zhuan Fang Zhang ◽  
You Wang ◽  
Xiao Hua Gu ◽  
Sheng Xiao Li
Keyword(s):  
Cast Iron ◽  
Strain Field ◽  
Stress And Strain ◽  
Cast Irons ◽  
Wear Performance ◽  
Cu Alloy ◽  
Shear Stress And Strain ◽  
Nano Additives ◽  
Alloy Cast Iron ◽  
Alloy Cast

In this paper Cr-Mo-Cu alloy cast irons were prepared by adding nano-additives. The finite element of ANSYS was used to simulate the change of the stress field and strain field of Cr-Mo-Cu alloy cast iron with nano-additives under wear abrasion. The changes of shear stress and strain are also discussed in this paper.

Ultrasonic Inspection for Microstructural and Mechanical Properties of Ductile Cast Iron

2021 ◽  
Vol 39 ◽  
pp. 9-19
Author(s):  
Özer Özdemir ◽  
Selim Gürgen ◽  
Melih Cemal Kuşhan
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Sound Speed ◽  
Ultrasonic Inspection ◽  
Flaw Detection ◽  
Wide Frequency Range ◽  
Ductile Cast Iron ◽  
Cast Irons ◽  
Ultrasonic Sound ◽  
Graphite Morphology

Ultrasonic inspection is a well-known method in non-destructive testing. Based on the changes in the ultrasonic sound speed, tested materials are evaluated in terms of internal defects. In addition to flaw detection, ultrasonic testing is used in the material characterization of ductile cast iron. Graphite shape detection has been widely investigated by ultrasonic inspection in literature. However, most of the measurements has been conducted at single frequencies. In this work, three different nodulizer included casting operations were carried out to produce ductile cast irons having various graphite morphologies. A wide frequency range of 1.25-10 MHz was selected in the ultrasonic inspection. In addition to graphite morphology analyses, the relationship between ultrasonic sound speed and mechanical properties was studied. In the mechanical analyses, hardness and tensile testing properties were investigated for the specimens. From the results, ultrasonic sound speed exhibits a considerable dependency to the graphite morphology. In addition to a good graphite detection capability, ultrasonic inspection exhibits promising results for predicting the mechanical properties such as hardness, elastic modulus, yield strength and tensile strength. It is also found that there is a slight increase in the ultrasonic sound speed by increasing the frequency, although sound speed is independent from this parameter.

Influence of Metallurgical Treatment on Properties of Ductile Cast Iron GJS 400-18 LT

2014 ◽  
Vol 635 ◽  
pp. 177-181
Author(s):  
Marianna Bartošová ◽  
Alena Pribulová ◽  
Jozef Bibko ◽  
Peter Futáš
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Impact Test ◽  
Constructional Material ◽  
Ductile Cast Iron ◽  
Operating Conditions ◽  
Spheroidal Graphite ◽  
Cast Irons ◽  
Plastic Properties ◽  
Test Impact

Cast iron with spheroidal graphite is a very good constructional material. Production of castings from standard kinds of nodular cast irons is quite good managed, but manufacturing of mark GJS 400-18 LT with excelent strength and plastic properties by minus temperatures is complicated, because it reacts very sensitively on the changing of melting conditions and metallugical treatment. The contribution is focused on an observation of changing of structure and mechanical properties by different ways of metallurgical treatment. In operating conditions of foundry three series of melts were made. From every melt the mould with testing pieces „Y“ with dimensions 25 x 40 x 140 mm was poured. Tensile test, impact test and metalographic analyse were realized on the test samples.

Analysis of Element Diffusion between Alloy Cast Iron and WC/Co Cemented Carbides

2016 ◽  
Vol 874 ◽  
pp. 339-344 ◽  
Author(s):  
T. Liu ◽  
Song Zhang ◽  
Jiang Feng Li
Keyword(s):  
Cast Iron ◽  
Cutting Tool ◽  
Cemented Carbide ◽  
Cemented Carbides ◽  
Cast Irons ◽  
Carbide Cutting Tool ◽  
Diffusion Wear ◽  
Tool Wear Mechanisms ◽  
Alloy Cast Iron ◽  
Alloy Cast

An alloy cast iron has special properties by adding some alloying elements to the ordinary cast iron ASTMNo35A. Diffusion wear is one of the main cutting tool wear mechanisms in machining of the alloy cast irons. The diffusion of tungsten (W) and iron (Fe) between the alloy cast iron and the WC/Co cemented carbides was investigated in this paper by means of heating diffusion couple. It has be proved from the experiment that Fe in the alloy cast iron diffused a deeper distance in the WC/Co cemented carbides with the higher Co content; while the diffusion of W element in the WC/Co cemented carbides the alloy cast iron was not serious. The Vickers-hardness analysis of the alloy cast iron and K20 cemented carbide couple was determined. The elements diffusion impaired the hardness of the alloy cast iron and WC/Co cemented carbide cutting tool.

TYPE 1 NI-RESIST

Alloy Digest ◽  
1989 ◽  
Vol 38 (12) ◽  
Keyword(s):  
Cast Iron ◽  
Physical Properties ◽  
Heat Treating ◽  
Corrosion Resistant ◽  
Austenitic Alloy ◽  
Continuously Cast ◽  
Alloy Cast Iron ◽  
Alloy Cast

Abstract Type 1 Ni-Resist Dura-Bar is a corrosion resistant austenitic alloy cast iron, continuously cast. It has less than 10% alloy carbides, well dispersed and fine graphite flakes. It is non magnetic. This datasheet provides information on composition, physical properties, microstructure, and elasticity. It also includes information on heat treating. Filing Code: CI-60. Producer or source: Federal Bronze Products Inc..

scholarly journals Solidification Pattern of Si-Alloyed, Inoculated Ductile Cast Irons, Evaluated by Thermal Analysis

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 846
Author(s):  
Iuliana Stan ◽  
Denisa Anca ◽  
Stelian Stan ◽  
Iulian Riposan
Keyword(s):  
Cast Iron ◽  
Eutectic Reaction ◽  
Influencing Factor ◽  
Cooling Curve ◽  
Major Influence ◽  
Cast Irons ◽  
Minor Elements ◽  
Si Content ◽  
Si Effect ◽  
Positive Effect

The solidification cooling curve itself as well as its first derivative, and related temperatures, reported to the calculated equilibrium temperatures in stable and metastable solidification systems, are used to predict the solidification characteristics of the cast iron. Silicon, as the most representative cast iron element, and inoculation, as graphitizing metallurgical treatment, have a major influence on the transition from the liquid to the solid state. Six experimental programs are performed, with Si content typically for non-alloyed (<3.0% Si), low (3.0–3.5% Si) and medium alloyed (4.5–5.5% Si) ductile cast irons, as Si-content increasing, and inoculation simultaneous effects. Silicon is an important influencing factor, but the base and minor elements also affect the equilibrium eutectic temperatures, much more in the Fe-C-Si-Xi stable system (15–20 °C) than in the metastable system (5–10 °C), comparing with their calculation based only on a Si effect (Fe-C-Si system). The highest positive effect of inoculation is visible in non-Si alloyed cast irons (2.5% Si): 9–15 °C for the eutectic reaction and 3 to 4 times increased at the end of solidification (37–47 °C). Increased Si content decreases inoculation power to 7–9 °C for low alloying grade (up to 3.5% Si), with the lowest contribution at more than 4.5% Si (0.3–2.0 °C). 2.5–3.5% Si ductile cast irons are more sensitive to high solidification undercooling, especially at the end of solidification (but with a higher efficiency of inoculation), compared to 4.5–5.5% Si ductile cast irons, at a lower undercooling level, and at lower inoculation contribution, as well.

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