Manufacturing of Ferritic Low-Silicon and Molybdenum Ductile Cast Iron with the Innovative 2PE- 9 Technique

Abstract The use of two cored wire injection methods (2PE- 9) and the unique application of a drum ladle as a treatment, transport and casting one, instead of a vertical treatment ladle are presented. Optimization parameters, like: length of nodulariser wire, treatment and pouring temperature have been shown. The influence of various treatment temperatures on magnesium recovery is demonstrated. The typical microstructure, mechanical properties and cost calculation of the ferritic ductile cast iron (type SiMo - EN-GJS-SiMo40-6 Grade) production according to EN 16124:2011 (E) are presented. Injection of two Ø 9 mm as well wires; cored in FeSi + Mg nodulariser mixture and inoculant master alloy into a drum ladle is a treatment method that can be used for the production of ferritic ductile cast iron (SiMo) melted in a coreless induction furnace.

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Research on Cored Wire Re-Sulfurization Injection for Compacted Graphite Cast Iron

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.727-728.231 ◽

2015 ◽

Vol 727-728 ◽

pp. 231-234

Author(s):

Yu Shuang Feng ◽

Ze Sheng Ji ◽

He Sheng Wu

Keyword(s):

Cast Iron ◽

Automotive Industry ◽

Ductile Cast Iron ◽

Application Process ◽

Cored Wire ◽

Injection Speed ◽

Compacted Graphite ◽

Iron Castings ◽

Graphite Cast Iron ◽

Engineering Industries

To promote the application process of compacted graphite cast iron in non-automotive industry, cored wire re-sulfurization injection was developed for the production of compacted graphite cast iron. Firstly, ductile cast iron was produced by cored wire injection. Then, the effective final residual Mg level was reduced to the appropriate range for compacted graphite formation by feeding sulfidizing cored wire containing 99% S. In this paper, the influencing factors on percentage of compacted graphite were analysed, such as the final residual Mg level, cored wire injection speed. The results show that compacted graphite cast iron with less than 20% nodularity can be produced steadily on the condition of adopting the correct speed and the added sulfidizing cored wire in the range from 0.8m/t to 0.9m/t. Practice has proven that cored wire re-sulfurization injection would be most appropriate for jobbing foundries intending to manufacture compacted graphite cast iron castings for engineering industries.

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A Computer-Aided Simulation of the Kinetics of Solidification of the Eutectic Ductile Cast Iron

MRS Proceedings ◽

10.1557/proc-34-191 ◽

1984 ◽

Vol 34 ◽

Cited By ~ 1

Author(s):

Fras Edward

Keyword(s):

Cast Iron ◽

Ductile Cast Iron ◽

Technological Parameters ◽

Pouring Temperature ◽

Technological Factors ◽

Solidification Kinetics ◽

The Family ◽

Computer Aided ◽

Effect Relation ◽

Kinetics Of

ABSTRACTAn attempt has been made to construct a model of the solidification of the globular eutectic grains which would account for an effect of interblocking the grain growth and would enable calculations starting with the pouring temperature and proceeding until the complete solidification of a casting is obtained. The family of equations proposed in this work enables a simulation of the kinetics of the transformation using a computer and basing only on the knowledge of the materials-designing properties of a foundry mould and the technological parameters of cast iron. The examples of computations given in the paper and the discussion of the results obtained makes it possible to explain the effect of various technological factors on the course of the solidification kinetics of a casting in the cause-effect relation.

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The Comparison of Selected Methods of Cast Iron Spheroidization in Industrial Conditions

Archives of Foundry Engineering ◽

10.2478/v10266-012-0043-8 ◽

2012 ◽

Vol 12 (2) ◽

pp. 89-92 ◽

Cited By ~ 1

Author(s):

T. Válek ◽

P. Šimon ◽

L. Střílková

Keyword(s):

Cast Iron ◽

Production Quality ◽

Ductile Cast Iron ◽

Spheroidal Graphite ◽

Cored Wire ◽

Centrifugally Cast ◽

Graphite Morphology ◽

Graphite Cast Iron ◽

Economic Balance ◽

Nodular Graphite

The Comparison of Selected Methods of Cast Iron Spheroidization in Industrial Conditions Production of spheroidal graphite cast iron is today quite mastered technology. There are many methods achieving the nodular graphite morphology. Each of these methods have specific characteristics and requirements to technical support, properties and the type of applied modifier. Selection of the spheroidization method is dependent on foundry disposition, production character, economic balance, quality requirements, etc. In case of centrifugally casting the core, which fills body and neck of the roll, is created by ductile iron. Considering the sophisticated production of centrifugally cast rolls for hot rolling mills it is necessary to ensure a high reproducibility and reliability of ductile cast iron production quality in the bulk range of 9-18 t per tapping. These conditions are in the Roll Foundry in Vítkovicke Slevarny, spol. s r.o. provided and verified mastered overpour method and the newly injection of cored wire in the melt.

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Using Cored Wire Injection Method in the Production of Austenitic High Ni-Alloyed Ductile Iron Castings

Archives of Metallurgy and Materials ◽

10.2478/amm-2013-0112 ◽

2013 ◽

Vol 58 (3) ◽

pp. 969-972 ◽

Cited By ~ 1

Author(s):

E. Guzik ◽

D. Wierzchowski

Keyword(s):

Ductile Iron ◽

Raw Materials ◽

Nodular Cast Iron ◽

Treatment Method ◽

Magnesium Content ◽

Graphite Nodule ◽

Cored Wire ◽

Injection Method ◽

Iron Castings ◽

Coreless Induction Furnace

Abstract Below are described results of the analysis concerning the use of two cored wire injection method (2PE- 9) and the unique application of a drum ladle as a treatment, transport and casting one, instead of a vertical treatment ladle. Parameter optimization, like: length of nodulariser wire, residual magnesium content, treatment and pouring temperature have been shown. Influence of various treatment temperatures, magnesium-cored wire velocities (Mg-treatment times) and weights of molten alloy on magnesium recovery are demonstrated. Moreover, graphite nodule content in relation to different raw materials in the charge mix are presented. Typical microstructure, mechanical properties and treatment costs are given as well. Using specific industrial conditions for tests and optimal, low scrap production of austenitic nodular cast iron (EN-GJSA-XNiSiCr35-5-2 Grade, according with EN 13835), makes this innovative method very credible. Injection of two Ø 9 mm wires; cored in FeSi + Mg nodulariser mixture and inoculant master alloy into a drum ladle is a treatment method that can be used for the production of ductile iron melted in a coreless induction furnace.

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Experimental Study of Fabrication of Cast-Iron Bonded cBN Grinding Wheels by V-EPC (I) - The Influence Factors on the Qualities of Grinding Layer

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1136.84 ◽

2016 ◽

Vol 1136 ◽

pp. 84-89

Author(s):

Qiu Lian Dai ◽

Can Bin Luo ◽

Jing Feng Liu

Keyword(s):

Cast Iron ◽

Surface Quality ◽

Thermal Damage ◽

Influence Factors ◽

Processing Technique ◽

Ductile Cast Iron ◽

Grinding Wheels ◽

Pouring Temperature ◽

New Processing

The new processing technique of vacuum evaporative pattern casting (V-EPC) process was explored to fabricate the cast-iron bonded cBN grinding wheels in this paper. The influences of pouring temperature, degree of vacuum, percentage and size of the cBN grits on the microstructures, distribution and thermal damage of cBN grits in the grinding layer, as well as the surface quality of the grinding layer were investigated. The experimental results revealed that thermal damage of the cBN grits and severe damage of nodulizer occurred when the pouring temperature was around 1480°C. The optimized pouring temperature for fabricate the austenite-bainite ductile cast-iron bonded cBN grinding wheels was about 1400°C. The appropriate degree of vacuum was 0.06Mpa. Too high or too low level of degree of vacuum would result in low surface quality of the grinding layer. The uniformity of the distribution of cBN grits in the metal matrix improved with the increase of the percentage and size of the cBN grits.

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