Sökning: "Investment casting"

Hittade 5 avhandlingar innehållade orden Investment casting.

  1. 1. Process development for investment casting of thin-walled components : Manufacturing of light weight components

    Författare :Mohsin Raza; Björn Fagerström; Jarfors Anders; Mälardalens högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Investment casting; fluidity; thin sections; porosity; grain structure; turbine blades and Niyama criterion; Innovation and Design; innovation och design;

    Sammanfattning : Manufacturing processes are getting more and more complex with increasing demands of advanced and light weight engineering components, especially in aerospace industry. The global requirements on lower fuel consumption and emissions are increasing the demands in lowering weight of cast components. LÄS MER

  3. 2. Foreign direct investment in competing host countries : a study of taxation and nationalization

    Författare :Thomas Andersson; Handelshögskolan i Stockholm; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : Capital-importing countries face a trade-off between the need to attract new investment and the desire to extract gains from investment already obtained. This dissertation analyses the developing countries’ taxation and nationalization of direct investment from the late 1960s and onwards. LÄS MER

  4. 3. Developing Process Design Methodology for Investment Cast Thin-Walled Structures

    Författare :Mohsin Raza; Björn Fagerström; Mark Jolly; Mälardalens högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Innovation and Design; innovation och design;

    Sammanfattning : Components for engineering systems, such as gas turbines and jet engines operating at high temperature are usually produced in superalloys. The investment casting process is most widely used for manufacturing these components due to the ability of the process to produce parts with complex geometries to close dimensional tolerances. LÄS MER

  5. 4. Weldability of Precipitation Hardening Superalloys – Influence of Microstructure

    Författare :Joel Håkan Andersson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hot cracking; GTAW; Transvarestraint testing; Varestraint testing; Gleeble testing; Solidification cracking; HAZ liquation cracking; Repair welding; Strain age cracking; EBW; DSC thermal analysis;

    Sammanfattning : Superalloys and in particular the precipitation hardened Ni-based superalloys havealways been used extensively in the hot sections of jet engines. Large hot structuralengine components with complex geometry have preferably been cast as single piececomponents since the large scale vacuum investment casting process becameavailable about fifty years ago. LÄS MER

  7. 5. Increasing the effectiveness of the tool development process through partnership

    Författare :Charlotta Johansson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Traffic Engineering; Trafikteknik;

    Sammanfattning : Partnership is about developing good business relations between two or more companies. It is a simple and effective working method that can be applied in many situations, including developing new products and associated tooling which is the focus of this thesis. LÄS MER