Investigation of the Effects of Austenitizing Temperature on the Austempering Behavior of EN-GJS- 600-3 Spheroidal Graphite Cast Iron

Konca, Erkan; Tur, Kazım

doi:10.36306/konjes.705209

Cited by 2 publications

(1 citation statement)

References 23 publications

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“…At the end of the examination, they concluded that the processes performed differed considerably in the microstructure and the mechanical properties were improved. [10].…”

Section: Introductionmentioning

confidence: 99%

Investigation of The Effect of Molding Material Difference on Design in GGG70 Ductile Cast Iron Production

Keskin,

Durmuş,

Şekerden

et al. 2024

Türk Doğa Ve Fen Dergisi

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The casting process involves filling a prepared mould cavity with molten metal, which takes the shape of the container. While the liquid metal takes the shape of the container it is in, the method is attractive, while the volumetric changes during the liquid-solid transformation reveal the importance of moulding design for the manufacture of solid parts. Especially in cast irons, moulds with the same design may produce different results depending on the changing casting and foundry conditions because the volumetric change that occurs during the solidification of ductile cast irons is affected by many parameters and develops differently than in steel and aluminium castings. This study used model wet and resin molding materials to create single and double-riser moulding and castings with different section thicknesses. The importance of the type of mold material used in castings and the number of feeders for the robust production of the cast part was evaluated using experimental and modeling techniques. When the results were examined, it was seen that the shrinkage risk was lower with resin mould than with green sand moulding. In addition, depending on the riser connection point, the importance of the riser neck has emerged.

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“…At the end of the examination, they concluded that the processes performed differed considerably in the microstructure and the mechanical properties were improved. [10].…”

Section: Introductionmentioning

confidence: 99%

Investigation of The Effect of Molding Material Difference on Design in GGG70 Ductile Cast Iron Production

Keskin,

Durmuş,

Şekerden

et al. 2024

Türk Doğa Ve Fen Dergisi

View full text Add to dashboard Cite

show abstract

Normali̇ze Isil İşlemi̇nde Arakri̇ti̇k Östeni̇tleme Sicakliğinin Küresel Grafi̇tli̇ Dökme Demi̇ri̇n Mi̇kroyapi Ve Mekani̇k Özelli̇kleri̇ Üzeri̇ne Etki̇si̇

KAYAALP

Şahin

Kılıçlı

2022

Konya Journal of Engineering Sciences

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In this investigation, the effect of normalizing heat treatments from annealing at intercritical austenitization temperatures on the microstructural evolution and mechanical properties of ductile iron was examined. Tensile specimens were prepared by turning from Y block castings made from unalloyed ductile iron. The specimens were air-cooled from different intercritical austenitization temperatures at (770°C to 820°C) for 60 minutes. Microstructural characterization was performed by optical microscope and scanning electron microscope (SEM). Mechanical properties were determined by tensile and hardness tests. Ductile iron containing different pearlite volume fractions (8 % to 75 %) can be produced by normalizing heat treatment from intercritical austenitization temperatures in ductile iron with a certain chemical composition. The pearlite volume fraction is significantly increased with increasing intercritical austenitization temperatures. Moreover, the hardness, yield, and tensile strength are significantly increased with increasing pearlite volume fraction. However, total elongation and reduction in area decreased with decreasing volume fraction of proeutectoid ferrite. With increasing volume fraction of pearlite from 8 % to 75 %; the hardness increased from 181 BHN to 259 BHN; yield strength increased from 348 MPa to 470 MPa; and the tensile strength significantly increased from 569 MPa to 790 MPa, while the total % elongation decreased from 12.6 % to 8.3 %. The fractographic analysis showed that the number of dimples zones decreased with increasing volume fraction of pearlite.

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Investigation of the Effects of Austenitizing Temperature on the Austempering Behavior of EN-GJS- 600-3 Spheroidal Graphite Cast Iron

Cited by 2 publications

References 23 publications

Investigation of The Effect of Molding Material Difference on Design in GGG70 Ductile Cast Iron Production

Investigation of The Effect of Molding Material Difference on Design in GGG70 Ductile Cast Iron Production

Normali̇ze Isil İşlemi̇nde Arakri̇ti̇k Östeni̇tleme Sicakliğinin Küresel Grafi̇tli̇ Dökme Demi̇ri̇n Mi̇kroyapi Ve Mekani̇k Özelli̇kleri̇ Üzeri̇ne Etki̇si̇

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