Sökning: "Cold work tool steel"

Visar resultat 11 - 15 av 19 avhandlingar innehållade orden Cold work tool steel.

1. 11. Investigation of Topography, Adhesion and Diffusion Wear in Sliding Contacts during Steel and Titanium Alloy Machining

   Författare :Sara Saketi; Staffan Jacobson; Mikael Olsson; Pavel Krakhmalev; Uppsala universitet; []
   Nyckelord :Tribology; Metal cutting; Cemented carbide; PCBN; CVD and PVD coatings; Sur-face topography; Wear mechanisms; Diffusion;

   Sammanfattning : The aim of the present thesis work is to increase the fundamental knowledge of the tribological contact between the cutting tool and the work material in three different cutting operations, i.e. hard milling of cold work tool steels, turning in 316L stainless steel and turning in Ti6Al4V alloy, respectively. LÄS MER

3. 12. High temperature galling : influencing parameters and mechanisms

   Författare :Leonardo Pelcastre; Jens Bergström; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements; Centrumbildning - Centrum för högpresterande stål CHS ; Centre - Centre for High Performance Steel CHS ;

   Sammanfattning : Damage of forming tools at elevated temperatures is a major problem in metal forming processes such as hot stamping. Of special importance is the occurrence of adhesion and gross material transfer from the work-piece to the tool surface, a phenomenon known as galling. LÄS MER

4. 13. Inhomogenity in microstructures

   Författare :Jacek Komeda; KTH; []
   Nyckelord :;

   Sammanfattning : The purpose of the present thesis is to quantitativelycharacterise structural features which contribute to thematerial anisotropy and to relate developed parameters to thematerial properties. Various forms of structural inhomogeneitywere quantified with the help of comuterised image analysisusing quantitative metallography and statistical analysismethods. LÄS MER

5. 14. Experimental and computational investigation of the roll forming process

   Författare :Michael Lindgren; Högskolan Dalarna; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Rollforming; Roll Forming; Flexible roll forming; Rullformning; Simulering och experimentell undersökning av rullformningsprocessen;

   Sammanfattning : One of the first questions to consider when designing a new roll forming line is the number of forming steps required to produce a profile. The number depends on material properties, the cross-section geometry and tolerance requirements, but the tool designer also wants to minimize the number of forming steps in order to reduce the investment costs for the customer. LÄS MER

7. 15. Experimental and computational investigation of the roll forming process

   Författare :Michael Lindgren; J Huetink; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material Mechanics; Materialmekanik;

   Sammanfattning : One of the first questions to consider when designing a new roll forming line is the number of forming steps required to produce a profile. The number depends on material properties, the cross-section geometry and tolerance requirements, but the tool designer also wants to minimize the number of forming steps in order to reduce the investment costs for the customer. LÄS MER