Sökning: "Hot rolling mill"

Visar resultat 1 - 5 av 8 avhandlingar innehållade orden Hot rolling mill.

1. 1. Modeling the Microstructural Evolution during Hot Deformation of Microalloyed Steels

   Författare :Linda Bäcke; Stefan Jonsson; Eric J. Palmiere; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; modeling; austenite; microalloyed steels; hot deformation; microstructure evolution; static recrystallization; dynamic recrystallization; metadynamic recrystallization<; Materials science; Teknisk materialvetenskap;

   Sammanfattning :   This thesis contains the development of a physically-based model describing the microstructural evolution during hot deformation of microalloyed steels. The work is mainly focused on the recrystallization kinetics. During hot rolling, the repeated deformation and recrystallization provides progressively refined recrystallized grains. LÄS MER

3. 2. Some aspects on lubrication and roll wear in rolling mills

   Författare :Mohammed Tahir; KTH; []
   Nyckelord :strip rolling; lubricants; environment; roll wear modeling. Production campaigns; regression analysis;

   Sammanfattning : The thesis is focused on lubricants and roll wear in striprolling.Regarding lubricants, the possibility of introducing newones, which are less detrimental towards environment, isstudied in laboratory scale. This is done for cold rolling,both of an Al- alloy and a low carbon steel. LÄS MER

4. 3. On impacts and ride-through of voltage sags exposing line-operated AC-machines and metal processes

   Författare :Fredrik Carlsson; KTH; []
   Nyckelord :Rolling mill; Blast furnace; Power Quality; Synchronous machine; Asynchronous machine; Voltage sag; Voltage interruption; Ride-through; Process disturbances; Simulation; Modelling;

   Sammanfattning : During the last decade, power quality has been recognised asa global problem. Among different types of power qualityproblems, voltage sags have been identified to be one of themost severe problems for different process industries. The mostcommon reason to voltage sags is lightning strikes in powerlines. LÄS MER

5. 4. Modeling the microstructural evolution during hot working of C-Mn and Nb microalloyed steels using a physically based model

   Författare :Linda Lissel; Stefan Jonsson; Bertil Ahlblom; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; austenite; modeling; hot deformation; microstructure evolution; static recrystallization; dynamic recrystallization; metadynamic recrystallization; Other materials science; Övrig teknisk materialvetenskap;

   Sammanfattning : Recrystallization kinetics, during and after hot deformation, has been investigated for decades. From these investigations several equations have been derived for describing it. The equations are often empirical or semi-empirical, i.e. LÄS MER

7. 5. Modeling the microstructural evolution during hot working of C-Mn and of Nb microalloyed steels using a physically based model

   Författare :Linda Lissel; []
   Nyckelord :austenite; modeling; hot deformation; microstructure; evolution; static recrystallization; dynamic recrystallization; metadynamic recrystallization; Modellering av mikrostrukturutvecklingen hos mikrolegerade stål under varmdeformation;

   Sammanfattning : Recrystallization kinetics, during and after hot deformation, has been investigated for decades. From these investigations several equations have been derived for describing it. The equations are often empirical or semi-empirical, i.e. LÄS MER