Sökning: "ultrahöghållfast stål"

Hittade 4 uppsatser innehållade orden ultrahöghållfast stål.

  1. 1. Projection Nut Welding to High- and Ultra-high Strength Steels

    Master-uppsats, KTH/Hållfasthetslära

    Författare :Love Englund; [2023]
    Nyckelord :mechanics; solid mechanics; material mechanics; welding; resistance welding; projection welding; nut welding; high strength steel; ultra high strength steel; uhss; coated boron steel; mekanik; hållfasthetslära; materialvetenskap; svetsning; motståndssvetsning; projektionssvetsning; muttersvetsning; belagt borstål;

    Sammanfattning : In an effort to increase the fuel efficiency of cars more widespread use of higher strength steels is seen for their high strength-to-weight ratio. Thesesteels are more limited in their formability and tendency to harden than conventional steels, complicating manufacturing. LÄS MER

  3. 2. Techniques for Improving Weldability and Testing of Weld-bonded Joints

    Master-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Mattias Högsäter Myhr; [2020]
    Nyckelord :Adhesives; Automotive industry; Resistance Spot Welding; RSW; Weldability; Weld-bonding; Welding parameters; Fordonsindustri; Limning; Limpunktsvetsning; Motståndssvetsning; Punktsvetsning; Svetsbarhet; Svetsparametrar;

    Sammanfattning : Increased understanding of improving the weld-bonding process is essential in order for the automotive industry to constantly develop their designs and production processes for the energy-efficient vehicles of the future. The joining method of weld-bonding, a hybrid method of adhesive joining and resistance spot welding, has introduced new challenges in the manufacturing and design of auto bodies. LÄS MER

  4. 3. Reduction of hydrogen embrittlement on Electrogalvanized Ultra High Strength Steels

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för kemi - Ångström

    Författare :Adam Haglund; [2014]
    Nyckelord :hydrogen embrittlement; electrogalvanized; ultra-high strength steel; martensite; vacuum evaporation; decarburization; hydrogen relief treatment; väteförsprödning; elförzinkning; ultrahöghållfast stål; martensit; vakuumförångning; ytavkolning; väteutdrivning;

    Sammanfattning : Ultra-high strength steels is known to be susceptible for hydrogen embrittlement at very low concentrations of hydrogen. In this thesis three methods to prevent or reduce the hydrogen embrittlement in martensitic steel, with tensile strength of 1500 MPa, were studied. LÄS MER

  5. 4. Finite Element Simulation of Roll Forming

    Magister-uppsats, Institutionen för ekonomisk och industriell utveckling

    Författare :Simon Hellborg; [2007]
    Nyckelord :Rullformning; Simulering; Ultrahöghållfast stål; Rollforming; Finite Element Simulation.;

    Sammanfattning : A finite element model has been developed to simulate the forming of a channel section profile with the roll forming method. The model has been optimized to experimental results with respect to strains at the edge of the sheet and spring back of the sides of the profile. LÄS MER