Essays about: "Gjutjärn"

Showing result 1 - 5 of 11 essays containing the word Gjutjärn.

  1. 1. Material analysis for a rotating inlet valve : Sliding contact in an oil-free super-critical steam environment

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Author : Johan Samuelsson; [2022]
    Keywords : Mechanical carbon; graphite; carbon graphite; zirconia; steam engine; steam; tribology; friction; wear; stellite; nitronic 60; antimony; carbon; Ni-resist cast iron; waste heat recovery; rotating inlet valve; valve; Mekaniskt kol; gafit; ångmotor; ånga; tribologi; friktion; nötning; gjutjärn; roterande inloppsventil; ventil;

    Abstract : In this thesis, the aim is to study possible tribo-materials for a rotating inlet valve and to find a suitable material combination for the contact. The valve is part of a modern oil-free and high temperature steam engine. Systematic material selection together with tribological tests and wear analyses are performed. READ MORE

  3. 2. Aspects of gating system improvement in a cast iron foundry

    University essay from KTH/Materialvetenskap

    Author : Fahami Annan Green; Felix Göttfert; [2021]
    Keywords : Gating system; Cast iron; Foundry; Pouring basin; Offset step basin; Sprue; Ingjutssystem; Gjutjärn; Gjuteri; Gjutskål; Förskjuten steggjutskål; Nedlopp;

    Abstract : The gating system transfers the iron melt from the ladle to the void in the casting mould. The gating systems dimensions and designs are crucial for the success of a casting and a poor gating system is a leading cause of scraps. READ MORE

  4. 3. Relation Between the Material in Press Hardening Dies and Fully Martensitic Transformation : Sheet properties of thick 3D-sheets in small series production

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Author : Jesper Christensson; [2020]
    Keywords : hot stamping; press hardening; material properties;

    Abstract : This report evaluates the influence of the die material on the cooling rate and martensitic transformation of press hardened sheets. The goal was to increase the thicknesses of sheets that can form fully martensitic microstructure when press hardened. READ MORE

  5. 4. Development of a Method to Measure Residual Stresses in Cast Components with Complex Geometries

    University essay from KTH/Materialvetenskap

    Author : Yang Yang; [2020]
    Keywords : Residual Stresses; Cast Iron; Engine Components; XRD; Ultrasonic; Cutting;

    Abstract : Cast iron, taking the advantages of the advanced castability forming components of complex geometries and favorable mechanical properties, is employed in engine components in truck industries. Compacted graphite iron (CGI) integrates both merits of lamellar graphite iron (LGI) and spheroidal graphite iron (SGI) such as good machinability and high thermal conductivity from LGI, high ultimate tensile strength (UTS), good fatigue resistance, high elastic modulus, and high ductility from SGI, thus is now becoming a competitive alternative of traditional LGI in cylinder blocks and heads. READ MORE

  6. 5. High temperature corrosion in exhaust application for heavy-duty trucks

    University essay from KTH/Materialvetenskap

    Author : Alice Moya; [2019]
    Keywords : high temperature corrosion; austenitic steel; cast iron; cast steel; oxidation; exhaust gas; engine; heavy-duty trucks;

    Abstract : Increasing awareness of environmental protection has made both governments and the industry aim for lowering carbon dioxide emissions. For the transport industry this means increasing engine efficiency, replacing fossil fuels with bio-based fuels or full electrification. READ MORE