Model of Solid State Transformations of Ductile Cast Iron GJS-600

Abstract This article presents new kinds of carbidic ductile cast iron with different microstructures of the metal matrix. This cast iron was obtained using the Inmold method nodularisation which guarantees strong refining of graphite and the metal matrix components. A different microstructure of the metal matrix of the cast iron was obtained without any thermal treatment (unwrought) by a suitable composition of alloy additives. It was shown that by adding molybdenum, chromium, nickel and copper it is possible to obtain in the cast iron metal matrix consisting of upper bainite, its mixture with lower bainite or ausferrite in the casts with the wall thickness of 3/25 mm. The process of cast iron crystallization is presented and described with the help of the thermal and derivative analysis (TDA) curves. It also shows the thermal effects from transformation of austenite in solid state.

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Metallographic study on the influence of the morphology and distribution of graphite on the solid state transformations of grey and ductile cast iron

International Journal of Cast Metals Research ◽

10.1080/13640461.1998.11819258 ◽

1998 ◽

Vol 11 (1) ◽

pp. 51-61 ◽

Cited By ~ 5

Author(s):

V. M. Bermont ◽

J. A. Sikora

Keyword(s):

Cast Iron ◽

Solid State ◽

Ductile Cast Iron ◽

Metallographic Study

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Model of Solid State Transformations of Ductile Cast Iron GJS-600

Journal of ASTM International ◽

10.1520/jai101802 ◽

2009 ◽

Vol 6 (2) ◽

pp. JAI101802

Author(s):

S. W. Dean ◽

V. Runser ◽

V. Schulze

Keyword(s):

Cast Iron ◽

Solid State ◽

Ductile Cast Iron

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Kinetics of Coarsening and Solid Sphericity during Reheating of Ductile Iron and Al Alloys

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.116-117.205 ◽

2006 ◽

Vol 116-117 ◽

pp. 205-208 ◽

Cited By ~ 8

Author(s):

P. Babaghorbani ◽

S. Salarfar ◽

Mahmoud Nili-Ahmadabadi

Keyword(s):

Cast Iron ◽

Solid State ◽

Ostwald Ripening ◽

Ductile Cast Iron ◽

Al Alloys ◽

Solid Particles ◽

Coarsening Kinetics ◽

Semi Solid ◽

Reheating Process ◽

Kinetics Of

Reheating process in the semi-solid state is a very important step in the thixoforming process. In this research semi-solid ductile cast iron and Al alloys (Al-2.5Si, Al356) prepared by inclined plate method, were reheated to examine the effect of reheating conditions on the microstructure and coarsening kinetics of the alloys. For ductile cast iron, solid fraction at different reheating temperatures and holding times was obtained and based on these results the optimum reheating temperature range was determined. In the case of Al alloys increase of holding time in the semi-solid state, leads to increase of liquid fraction, solid grain size and improvement of sphericity of solid particles. In addition, the results show that coarsening kinetics of microstructures of both alloys during reheating was diffusion controlled and can be mostly treated by Ostwald ripening theory.

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