The Heat Treatment of Spheroidal Graphite S.G. Cast Iron PDF Download
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Author: British Cast Iron Research Association
Publisher:
ISBN:
Category :
Languages : en
Pages : 209
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Book Description
Author: British Cast Iron Research Association
Publisher:
ISBN:
Category :
Languages : en
Pages : 209
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
S.G Cast iron is defined as a high carbon containing, iron based alloy in which the graphite is present in compact, spherical shapes rather than in the shape of flakes, the latter being typical of gray cast iron . As nodular or spheroidal graphite cast iron, sometimes referred to as ductile iron, constitutes a family of cast irons in which the graphite is present in a nodular or spheroidal form. The graphite nodules are small and constitute only small areas of weakness in a steel-like matrix. Because of this the mechanical properties of ductile irons related directly to the strength and ductility of the matrix present—as is the case of steels. One reason for the phenomenal growth in the use of Ductile Iron castings is the high ratio of performance to cost that they offer the designer and end user. This high value results from many factors, one of which is the control of microstructure and properties that can be achieved in the ascast condition, enabling a high percentage of ferritic and pearlitic structure.
Author:
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Category :
Languages : en
Pages :
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Ductile iron or popularly known as Spherodized graphite iron (SG iron) is a special variety of cast iron having carbon content more than 3% and has graphite present in compact, spherical shapes. These compact spheroids hamper the continuity of the matrix much less than graphite flakes which results in higher strength and toughness with a structure that resembles gray cast iron, thus imparting superior mechanical properties i.e. much higher than all other cast irons and which can be compared to steels. This unique property enables ductile irons to be used for numerous industrial applications. Alloying element addition greatly affects the mechanical properties of SG iron with Si, Mn, Cu and Ni being more predominant. While copper helps increasing the tensile strength and hardness causing no embrittlement in the matrix, Ni helps enhancing the U.T.S without affecting the impact test values. Thus addition of Cu and Ni plays an important role in determining the end properties of SG iron after heat treatment. The high ratio of performance to cost which they offer to the designer and end user makes them to be used extensively for industrial applications. However, to extend the consistency and range of properties of SG iron castings beyond its properties in as-cast condition, Heat treatment is a necessary operation. Tempering and Austempering are the two most widely used heat treatment operations in SG iron. For example a ferritic iron having 70-80% ferrite has a yield strength of 350Mpa while a similar material which is given a step quenching treatment shows a yield strength of 550-1250Mpa. Recently developed Austemperd Ductile iron (ADI) has good abrasion resistance combined with excellent ductility and toughness.
Author: Al Alagarsamy
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 300
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Author: Eduard Dorazil
Publisher: Prentice Hall
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 256
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
In their bid to produce cast iron latter than Malleable Iron, the scientist discovered the ductile iron or S.G. Iron (spherodial Graphite iron) way back in 1948. The use of this type of cast iron as an engineering material has been increasing day by day ever since its discovery. It is now replacing steel in many important engineering applications. The production of S.G Iron increased to a large extent during last two decades. The excellent combination of mechanical properties obtained in S.G. iron can further be informed by the heat treatment. The most recent development in this regard is the production of Austempered Ductile Iron (ADI). It provides an excellent combination of high tensile strength, wear resistance along with good corrosion resistance and quite significant amount of ductility. Due to these factors, S.G. or ductile iron are austempered when a very favourable combination of various properties is required. But this type of treatment is bit tricky, since it require controlled heating and isothermal holding of the material. So it is necessary to find some attractive methods for property development in S.G. iron. In the present work conventional heat treatment proceeds like annealing, normalizing and tempering of the material has been performed. The mechanical properties obtain by various technique have been compared to one another. In this work two different grades of S.G. Iron (one with copper and another without copper) have been used. The effect of the alloying element (i.e. copper) has also been studied.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Harry Chandler
Publisher: ASM International
ISBN: 9780871705204
Category : Technology & Engineering
Languages : en
Pages : 920
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Book Description
This edition is a complete revision and contains a great deal of new subject matter including information on ferrous powder metallurgy, cast irons, ultra high strength steels, furnace atmospheres, quenching processes, SPC and computer technology. Data on over 135 additional irons and steels have been added to the previously-covered 280 alloys.
Author: Klaus Röhrig
Publisher:
ISBN: 9783872600486
Category : Iron, Nodular
Languages : de
Pages : 107
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Book Description
Author: RAJAN, T. V.
Publisher: PHI Learning Pvt. Ltd.
ISBN: 811936404X
Category : Science
Languages : en
Pages : 378
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Book Description
The study of heat treatment has assumed great significance because of the vital role heat treatment plays in achieving the designed characteristics in a given material. This comprehensive and well-organized text skilfully blends the theoretical and practical aspects of heat treatment. It discusses, in rich detail, about heat treatment of commercial steels, cast irons and non-ferrous metals and alloys. The book also offers an in-depth analysis of topics such as nature of metals and alloys; principles of heat treatment of steels; heat treatment processes; possible defects, causes and remedies in heat treatment. This third edition of the successful text has gone through considerable modification on the basis of responses received. A new chapter on “Transforming the Heat Treatment Industry: The Role of Digitization” has been added for latest trends in technology. Multiple choice questions and other pedagogically arranged questions are reorganized to help students assess their subject knowledge. Designed primarily as a text for undergraduate and postgraduate students of Metallurgy, the book is also useful for undergraduate students of mechanical, production, and chemical engineering. Besides, it meets the requirements of students of AMIE/AMIIM, and of diploma level courses in metallurgical and mechanical engineering. Furthermore, the book can serve as an invaluable reference for practising engineers. TARGET AUDIENCE •B.E./B.Tech/M.Tech (Metallurgical Engineering) • B.E./B.Tech (Mechanical, Production & Chemical Engineering.
