Influence of ferrite and pearlite content on mechanical properties of ductile cast irons

2013 ◽  
Vol 567 ◽  
pp. 1-8 ◽  
Author(s):  
R.A. Gonzaga
Keyword(s):  
Mechanical Properties ◽  
Cast Irons ◽  
Pearlite Content

Alloy Design and Microstructure Control for the Production of Heavy Ductile Irons Used in Large-Scale Windmills

2013 ◽  
Vol 652-654 ◽  
pp. 909-915
Author(s):  
Yung Ning Pan ◽  
Chi Chia Lin ◽  
Re Mo Chang
Keyword(s):  
Mechanical Properties ◽  
Large Scale ◽  
Alloy Design ◽  
Chemical Compositions ◽  
Regression Equations ◽  
Cast Irons ◽  
Pearlite Content ◽  
Temperature Impact ◽  
Si Content ◽  
The Impact

The primary purpose of this research is to establish the optimal alloy design and microstructure for achieving the desired mechanical properties (tensile strength, yield strength, elongation and low temperature impact value) of key components used in large-scale windmills. In order to meet the impact requirement (I-40°C≥10J) of spec. EN-GJS-350-22U-LT, the Si content should be kept below 1.97%, and also the maximum pearlite content shouldn’t exceed 7.8%. On the other hand, the optimal alloy designs that can comply with specification EN-GJS-700-2U include 0.25%Mn+0.8%Cu+0.01%Sn , 0.25%Mn+0.6%Cu+0.05%Sn and 0.45%Mn+0.6%Cu+0.01%Sn. Furthermore, based upon the experimental results, multiple regression analyses have been performed to correlate the mechanical properties with chemical compositions and microstructures. The derived regression equations can be used to attain the optimal alloy design for castings with targeted specifications. Furthermore, by employing these regression equations, the mechanical properties can be predicted based upon the chemical compositions and microstructures of cast irons.

scholarly journals Effect of Cooling Rate and Ti Addition on the Microstructure and Mechanical Properties in As-cast Condition of Hypereutectic High Chromium Cast Irons

2012 ◽  
Vol 52 (12) ◽  
pp. 2210-2219 ◽  
Author(s):  
Qiang Liu ◽  
Hongwei Zhang ◽  
Qiang Wang ◽  
Xiangkui Zhou ◽  
P^|^auml;r G. J^|^ouml;nsson ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cooling Rate ◽  
Cast Irons ◽  
High Chromium ◽  
Microstructure And Mechanical Properties ◽  
Cast Condition ◽  
Ti Addition

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.

Comparison of Shear, Compressive and Tensile Characteristics of Cast Irons

1973 ◽  
Vol 15 (1) ◽  
pp. 53-60 ◽  
Author(s):  
R. D. Adams ◽  
M. A. O. Fox
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Design Criteria ◽  
Matrix Structure ◽  
Proof Stress ◽  
Cast Irons ◽  
The Matrix ◽  
The Relationship ◽  
Graphite Inclusions ◽  
Strength And Ductility

Cast irons were produced with variations in the quantity and shape of the free graphite inclusions and in the matrix structure to investigate the relationship between the shear, compressive and tensile mechanical properties. Differences were observed which may have a significant effect on design criteria for cast irons. For example, the ratio of shear to tensile strengths decreased from about 1·25 to 0·577 and the ratio of 0·1 per cent proof stress in compression to that in tension decreased from approximately 2 to 11 as the tensile strength (and ductility) were increased.

Relationship Between Some Physico-Mechanical Properties and Numerical Indexes of Graphite Shape in Compacted-Vermicular Graphite Cast Irons

1982 ◽  
Vol 104 (1) ◽  
pp. 60-65
Author(s):  
Yuichi Tanaka ◽  
Hakaru Saito ◽  
Ikuo Tokura ◽  
Katsuya Ikawa
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Mechanical Characteristics ◽  
Point Of View ◽  
Cast Irons ◽  
Graphite Cast Iron ◽  
Mechanical And Physical Properties ◽  
Definition Of ◽  
Thermal Diffusivities ◽  
The Relationship

The main purpose of this paper is to present some data on the mechanical and physical properties of compacted-vermicular graphite cast iron and to give a reasonable interpretation to the characteristics by using numerical indexes indicating the shape of graphite flakes in the structure. After describing the preparation of the material and a new method for measuring thermal diffusivity of the iron, the influence of kind and amount of alloy added for treatment and of cooling rate upon the graphite shape is discussed by using the indexes of the structure. The thermal diffusivities and mechanical characteristics such as tensile strength and hardness are shown as functions of the indexes to clarify the relationship between them. Furthermore, the present indexes are compared with those proposed earlier to find which is most suitable for the cast iron treated in this work. Authors propose a definition of compacted-vermicular graphite cast iron, which is reasonable from the physico-mechanical point of view, and also show some typical mechanical properties and measures required to produce such cast iron with desirable features.

scholarly journals Effect of Selected Alloying Elements on Mechanical Properties of Pearlitic Nodular Cast Irons

2010 ◽  
Vol 457 ◽  
pp. 361-366 ◽  
Author(s):  
Joan Serrallach ◽  
Jacques Lacaze ◽  
Jon Sertucha ◽  
Ramón Suárez ◽  
Adrián Monzón
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Low Cost ◽  
Alloying Elements ◽  
Cast State ◽  
Cast Irons ◽  
Alloying Additions ◽  
Automotive Engines ◽  
Steel Castings ◽  
Continuous Demand

There is a continuous demand for low-cost nodular cast irons with improved mechanical properties, this being an industrial requirement both for pearlitic as well as for ferritic grades. Developments in pearlitic nodular irons should lead to alloys with higher and higher strength while retaining some ductility in the as-cast state so as to respond to demands related to castings for high power automotive engines in competition with steel castings and ADI. According to these aims, several alloying elements have been selected and added separately or combined to standard commercial nodular cast irons. In all cases, only low-level additions were made and their effects on the microstructure and mechanical properties at room temperature have been characterized and are discussed. A statistical analysis has been performed on the data obtained that accounts for changes in alloying additions as well as for variations in process parameters.

scholarly journals Testing of the physical and mechanical properties of cast iron with the help of IFMH-C device

2019 ◽  
pp. 65-69
Author(s):  
A. P. Kren ◽  
V. A. Rudnitsky ◽  
G. A. Lantsman ◽  
M. N. Delendik ◽  
N. V. Zinkevich ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cast Iron ◽  
Physical And Mechanical Properties ◽  
Spheroidal Graphite ◽  
Applied Physics ◽  
National Academy Of Sciences ◽  
Cast Irons ◽  
Academy Of Sciences ◽  
Manufacturing Environments ◽  
Non Destructive

The possibility of the application of impact microindentation method for testing the physic and mechanical properties of cast iron using the IFMH-C instrument developed at the Institute of applied physics of the National Academy of Sciences of Belarus was tested. It was established that the method and the instrument allow to estimate such parameters as Brinell hardness in the range of 100–500 HB, elastic modulus from 40 to 200 MPa, as well as to determine the tensile strength of the flake and spheroidal graphite cast irons. The possibility of using the instrument for non-destructive test directly of parts and products in the manufacturing environments is shown.

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