Search for dissertations about: "Andrey Karasev"

Showing result 1 - 5 of 16 swedish dissertations containing the words Andrey Karasev.

  1. 1. Three Dimensional Determinations of Inclusions in Ferroalloys and Steel Samples

    Author : Yanyan Bi; Andrey Karasev; Chris Pistorius; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Three dimensional; Ferroalloy; Inclusion; Spinel inclusion; T hermodynamic calculation; REM clusters; Formation mechanism; Statistical analysis; Maximum size;

    Abstract : As the requirements on material properties increase, there has been a demand on an additional knowledge on the effect of impurities in the ferroalloyson the steel cleanness. Thus, the number, morphology, size and composition of inclusions in sixdifferent ferroalloys (FeTi, FeNb, FeSi,SiMn, LC and HC FeCr) were investigatedin this study. READ MORE

  2. 2. Some aspects of recycling of rest products and slag foaming in the EAF during stainless steel production

    Author : Arkadiy Davydenko; Andrey Karasev; Robert Eriksson; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : An efficient stainless steel making industry is defined by different factors such as an efficient utilisation of energy in the Electric Arc Furnace (EAF). This requires a good by slag foaming practice and an utilisation of waste products from own production facilities. READ MORE

  3. 3. 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 : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; non-metallic inclusions; Ca treatment; stainless steel; machinability.; icke-metalliska inneslutningar; kalciumbehandling; rostfritt stål; skärbarhet.; Materials Science and Engineering; Teknisk materialvetenskap;

    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. 4. An Experimental Study of a Liquid Steel Sampling Process

    Author : Ola Ericsson; Andrey Karasev; Pär Jönsson; Lauri Holappa; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; liquid steel sampling; inclusion characteristics; sampling conditions; sample homogeneity.; Metallurgical process engineering; Metallurgisk processteknik;

    Abstract : During the steelmaking process samples are taken from the liquid steel, mainly to assess the chemical composition of the steel. Recently, methods for rapid determination of inclusion characteristics (size and composition) have progressed to the level where they can be implemented in process control. READ MORE

  5. 5. An Experimental Study of Liquid Steel Sampling

    Author : Ola Ericsson; Pär Jönsson; Andrey Karasev; Malin Hallberg; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; liquid steel sampling; slag protection; filling velocity; solidification rate; sample homogeneity; Metallurgical process and manufacturing engineering; Metallurgisk process- och produktionsteknik;

    Abstract : Sampling of liquid steel to control the steel making process is very important in the steel industry. However, there are numerous types of disposable samplers and no united standard for sampling. The goal in this study is to investigate the effect of slag protection type and sample geometry on sampling parameters and sample homogeneity. READ MORE