Search for dissertations about: "chromium steel"

Showing result 1 - 5 of 101 swedish dissertations containing the words chromium steel.

  2. 1. Key Aspects of Sintering Powder Metallurgy Steel Prealloyed with Chromium and Manganese

    Author : Ola Bergman; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Manganese; Prealloyed; Sintering; Mechanical properties; Chromium; Spinel oxide; Powder metallurgy; PM steel; Oxide reduction; Residual oxides; Atmosphere;

    Abstract : The powder metallurgy (PM) process is a cost efficient near net-shape technology suitable for sustainable manufacturing of structural steel components. A drawback with the PM technology is the difficulty to use oxidation sensitive alloying elements, such as Cr and Mn. READ MORE

  4. 2. Microanalysis of a ferritic steel intended for high temperature applications

    Author : Lars Lundin; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; creep resistant; chromium steel; atom-probe field-ion microscopy; tempered martensite; powder metallurgical; preciotate; creep; microstructure; TEM; ferretiv steel;

    Abstract : .... READ MORE

  5. 3. Studies of surface treatments of stainless steel for improved corrosion resistance

    Author : Daniel Wallinder; KTH; []
    Keywords : stainless steel; iron; chromium; passivity; passive film; pickling; polishing; passivation; bright-annealing; XPS; SIMS; EIS; potentiostatic polarization; potentiodynamic polarization; aqueous corrosion; localized corrosion; atmospheric corrosion; hi;

    Abstract : .... READ MORE

  6. 4. Corrosion and Surface Studies of Stainless Steel and Chromium Carbide Thin-Films

    Author : Jonas Högström; Leif Nyholm; Kristina Edström; Patrik Schmutz; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; corrosion; electrochemistry; thin film; stainless steel; passive film; chromium carbide; carbon oxidation; surface; depth profile; XPS; SEM; EQCM; sputtering;

    Abstract : Although the passive films that form on stainless steels have been extensively studied, the concentration depth profiles are not fully understood. Their thinness makes passive films hard to study, but angle-resolved X-ray photoelectron spectroscopy (ARXPS) is a non-destructive technique that can be used to obtain depth information. READ MORE

  7. 5. Studies of oxide reduction and nitrogen uptake in sintering of chromium-alloyed steel powder

    Author : Ola Bergman; John Ågren; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; powder metallurgy; chromium; pre-alloying; surface oxides; sintering; Materials science; Teknisk materialvetenskap;

    Abstract : The powder metallurgy (PM) process route is very competitive for mass production of structural steel components with complex shape, due to efficient material utilisation, low energy consumption, and short overall production time. The most commonly used alloying elements are the processing friendly metals Cu, Ni and Mo. READ MORE