Search for dissertations about: "ingot casting defects"

Found 4 swedish dissertations containing the words ingot casting defects.

2. 1. A Study of the Initial Mould Filling during Up-hill Ingot Casting

   Author : Line Hallgren; Pär Jönsson; Anders Tilliander; Seppo Louhenkilpi; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; swirling flow; up-hill teeming; nozzle; casting; fluid flow; modelling; CFD; LDA; swirl; ingot casting; filling; red eye;

   Abstract : The fluid flow in the mould during up-hill teeming is of great importance for the quality of the cast ingot and thereby the quality of the final steel products. At the early stage of the filling of an up-hill teeming mould, liquid steel flows with a high velocity from the runner into the mould. READ MORE

4. 2. Effect of swirling blade on flow pattern in nozzle for up-hill teeming

   Author : Line Hallgren; Pär Jönsson; Jonas Alexis; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; swirling flow; up-hill teeming; nozzle; casting; fluid flow; modelling; CFD; LDA.; Metallurgical process engineering; Metallurgisk processteknik;

   Abstract : The fluid flow in the mold during up-hill teeming is of great importance for the quality of the cast ingot and therefore the quality of the final steel products. At the early stage of the filling of an up-hill teeming mold, liquid steel enters, with high velocity, from the runner into the mold and the turbulence on the meniscus could lead to entrainment of mold flux. READ MORE

5. 3. The Effect of Processing Parameters and Alloy Composition on the Microstructure Formation and Quality of DC Cast Aluminium Alloys

   Author : Majed Jaradeh; Torbjörn Carlberg; Lars Arnberg; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aluminium wrought alloys; AA3xxx and 6xxx; Direct Chill Casting; Unidirectional Solidification; Bridgman technique; Process parameters; Microstructure; Composition modification; Thermal analysis; Inclusions; Metallographical investigations; Metallurgical process engineering; Metallurgisk processteknik;

   Abstract : The objective of this research is to increase the understanding of the solidification behaviour of some industrially important wrought aluminium alloys. The investigation methods range from direct investigations of as-cast ingots to laboratory-scale techniques in which ingot casting is simulated. READ MORE

6. 4. Volume Change Effects during Solidification of Alloys

   Author : Bahman Korojy; Hasse Fredriksson; Brij K. Dhindaw; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Teknisk materialvetenskap;

   Abstract : Volume change during solidification is an important concept in achieving of casting soundness. The solidification shrinkage can cause different defects in the ingot casting as well as the shape casting. The volume change due to phase transformation during solidification is the other concept which has to be studied. READ MORE