Search for dissertations about: "Tool steel"

Showing result 11 - 15 of 157 swedish dissertations containing the words Tool steel.

  1. 11. Multicomponent diffusional reactions in tool steels Experiment and Theory

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Greta Lindwall; KTH.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hot-work tool steel; precipitation hardening; DICTRA; coarsening; mobilities; CALPHAD; cobalt; PM tool stees; nitrogen; compound materials;

    Abstract : Many phenomena determining the microstructure of a tool steel and consequently the properties of the material, are governed by multicomponent diffusion. The diffusion driven reactions that take place during, for example, tempering of a hot-work tool steel or when the microstructure develops during hot isostatic pressing of cold-work tool steel, are dependent on the types and amounts of alloying elements. READ MORE

  2. 12. The early stage of galling

    University dissertation from Karlstad : Karlstads universitet

    Author : Patrik Karlsson; Karlstads universitet.; Örebro universitet.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materialteknik; Materials Engineering; Galling; Stainless steel; Tool steel; Friction; Sliding wear; SOFS; Tribology; Wear;

    Abstract : In sheet metal forming (SMF) of materials such as stainless steels there is a major problem with transfer and accumulation of sheet material to the metal forming tool surface. The problem is known as galling; a kind of severe adhesive wear, which results in severe scratching of produced parts. READ MORE

  3. 13. A Study of Slag/Metal Equilibrium and Inclusion Characteristics during Ladle Treatment and after Ingot Casting

    University dissertation from Stockholm : KTH

    Author : Hamid Doostmohammadi; KTH.; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; inclusions; thermodynamics; ladle treatment; vacuum; tool steel; bearing steel; slag; equilibrium; slag carryover; oxides; sulfides.; TECHNOLOGY Chemical engineering Metallurgical process and manufacturing engineering Metallurgical process engineering; TEKNIKVETENSKAP Kemiteknik Metallurgisk process- och produktionsteknik Metallurgisk processteknik;

    Abstract : Today, there is a high demand on clean steel for high performance materialproperties. Thus, steel producers try to deliver a steel product with the highestquality and cleanliness to the market. The number of parameters that affect thesteel cleanliness may vary depending on the required material properties of thefinal product. READ MORE

  4. 14. The Positive Effect of Nitrogen Alloying of Tool Steels Used in Sheet Metal Forming

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Irma Heikkilä; Uppsala universitet.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; galling; nitrogen; tool steel; sliding contact; metal forming; Teknisk fysik med inriktning mot tribomaterial; Engineering Science with specialization in Tribo Materials;

    Abstract : Sheet metal forming processes are mechanical processes, designed to make products from metal sheet without material removal. These processes are applied extensively by the manufacturing industry to produce commodities such as heat exchangers or panels for automotive applications. They are suitable for production in large volumes. READ MORE

  5. 15. Chromium martensitic hot-work tool steels damage, performance and microstructure

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Johnny Sjöström; Karlstads universitet.; [2004]
    Keywords : Materialteknik; Materials Engineering; Hot-work tool steel; thermal fatigue; microstructure;

    Abstract : Chromium martensitic hot-work tool steel (AISI H13) is commonly used as die material in hot forming techniques such as die casting, hot rolling, extrusion and hot forging. They are developed to endure the severe conditions by high mechanical properties attained by a complex microstructure. READ MORE