Sökning: "high temperature lubrication"

Visar resultat 1 - 5 av 16 uppsatser innehållade orden high temperature lubrication.

1. 1. Optimization of hot strip drawing test methodology for hot forming of aluminium alloys

   Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Författare :Rabia Arshad; [2022]
   Nyckelord :Hot forming of aluminium; friction; high temperature lubrication; strip draw; wear.;

   Sammanfattning : The development of lightweight design for automotive applications has lasted for many years and is still increasing. Vehicles with light structures use less fuel, emit less CO2, and are better for the environment. LÄS MER

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

   Uppsats för yrkesexamina på avancerad nivå, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

   Författare :Johan Samuelsson; [2022]
   Nyckelord :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;

   Sammanfattning : 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. LÄS MER

4. 3. Lubricants for Hot Stamping of Aluminum: Evaluation of Tribological Behavior and Cleanability

   Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Författare :Barbara Maria Rodriguez Leal; [2021]
   Nyckelord :Tribology; High-temperature; Metal-forming; Aluminum;

   Sammanfattning : Working at elevated temperature has its challenges due to the high level of complexity whenthe tribosystems operate under harsh conditions, commonly resulting in an increase on thefriction and thermal softening that goes into severe adhesion, severe abrasion and materialtransfer. Despite considerable research, there is a lack of research on tribology applied to hightemperature processes. LÄS MER

5. 4. Material Transfer Mechanisms during Interaction of Aluminium Alloy and Tool Steel at Elevated Temperatures

   Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Författare :Gabriel Macêdo; [2020]
   Nyckelord :material transfer mechanisms; high temperature tribology; hot metal forming tribology; hot-stamping of aluminium alloys; aluminium alloys;

   Sammanfattning : Hot stamping of aluminium alloys allows for increased formability, decreased springback and the possibility of integrating age-hardening heat treatments into the process. However, it can be challenging due to the occurrence of material transfer of aluminium onto the tool, as aluminium is prone to adhesion even at low temperatures. LÄS MER

7. 5. Model of Thermal EHL Based on Navier-Stokes Equations : Effects of Asperities and Extreme Loads

   Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

   Författare :Marko Tošić; [2019]
   Nyckelord :;

   Sammanfattning : A common approach in numerical studies of elastohydrodynamic lubrication (EHL) is based on solving the Reynolds equation that governs pressure distribution in thin lubricant films. The Reynolds equation is derived from the Navier-Stokes equations by taking assumptions that are considered valid when the thickness of the lubricant film is much smaller than its length. LÄS MER