Sökning: "High speed Steel HSS"

Hittade 4 avhandlingar innehållade orden High speed Steel HSS.

1. 1. On the processing of starch consolidated high speed steel - Microstructure and tribological properties

   Författare :Peter Harlin; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; tribological properties; green body; microstructure; porosity; high speed steel; Starch consolidation; super solidus liquid phase sintering; mechanical properties;

   Sammanfattning : This thesis focuses on processing of high speed steel (HSS) powder into components using starch consolidation (SC) and supersolidus liquid phase sintering (SLPS). The work consists of four parts. First, the possibilities and constrains of the SC process are investigated and the role of starch in the green body fabrication clarified. LÄS MER

3. 2. Theoretical and experimental studies of a single tooth milling process

   Författare :Mathias Werner; Cornel Mihai Nicolescu; Lars Nyborg; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hobbing; single tooth milling test; TiN; High speed Steel HSS ; wear mechanisms; cutting force; cutting edge preparation; tool surface preparation; FEM cutting model;

   Sammanfattning : The industrial development of metal cutting processes in gear manufacturing aims at continuously increasing productivity, including increased tool reliability. Basically, the parameters that have an influence on the cutting processes should be known and possible to control.Gear manufacturing is highly important for the automotive industry. LÄS MER

4. 3. Surface Composition and Microstructure Control during Pressureless Forming and Sintering of Ferrous Powder Metallurgy Materials

   Författare :Sílvia Magalhães; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; metal injection moulding MIM ; surface reactions; SEM; MS; supersolidus liquid phase sintering; TGA; high speed steel HSS ; liquid phase sintering; starch consolidation SC ; XPS; ferrous powder; powder metallurgy PM ; degassing;

   Sammanfattning : This study addresses key issues related to different stages of ferrous PM materials processing. Several analytical tools are applied in the study of surface composition and microstructure control in the processing of ferrous powder including forming, degassing and sintering stages. LÄS MER

5. 4. Optimizing liquid phase sintering of ferrous powder metallurgical materials

   Författare :Henrik Borgström; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; surface chemical analysis high speed steel; Vacuum annealing; nitrogen alloying; liquid phase sintering;

   Sammanfattning : The properties of powder metallurgical, PM, components are dependent on that the dilemma of full density and suitable microstructure is resolved. Whilst it is often possible to achieve full density, it may or may not coincide with a suitable microstructure. LÄS MER