Search for dissertations about: "kalciumbehandling"

Found 2 swedish dissertations containing the word kalciumbehandling.

  2. 1. Evaluations of Non-metallic Inclusionsin Ca-treated Steels and Their Effect on the Machinability

    Author : Hongying Du; Andrey Karasev; Pär Jönsson; Lauri Holappa; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; non-metallic inclusions; Ca treatment; stainless steel; machinability.; icke-metalliska inneslutningar; kalciumbehandling; rostfritt stål; skärbarhet.; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : In recent decades, a considerable development of steel with respect to the performance of steel has taken place, which also has resulted in large challenges to process these steel grades. Therefore, it is essential to make suitable modifications of non-metallic inclusions (NMI) in the steelmaking process and to have a good control of its characteristics to meet the target mechanical properties and to obtain a good machinability. READ MORE

  4. 2. Non-metallic inclusions in pipeline steels and their effect on the corrosion resistance

    Author : Elena Sidorova; Andrey Karasev; Pär Jönsson; Lauri Holappa; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pipeline steels; Ca-treatment; non-metallic inclusions; electrolytic extraction; corrosion; chemical extraction; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract :  This thesis focus on investigations of the influence of non-metallic inclusions on corrosion in steel samples taken at different stages of the steel production when producing pipeline steels. The electrolytic extraction technique was used to extract inclusions from these steel samples and thereafter studying them using scanning electron microscopy in combination with energy dispersive microscopy. READ MORE