Avancerad sökning

Hittade 4 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Steel characteristics and their link to chip breaking and tool wear in metal cutting

   Författare :Niclas Ånmark; Andrey Karasev; Pär Göran Jönsson; Thomas Björk; Mikael Olsson; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; machinability; steel; non-metallic inclusions; skärbarhet; stål; icke-metalliska inneslutningar; Teknisk materialvetenskap; Materials Science and Engineering;

   Sammanfattning : The vision of this thesis is to study how it is possible to obtain optimised workpieces during metal cutting processes in industry. Specifically, the work is aimed to increase the understanding between the steel characteristics and their link to the chip breaking and tool wear during metal cutting. LÄS MER

3. 2. Evaluations of Non-metallic Inclusionsin Ca-treated Steels and Their Effect on the Machinability

   Författare :Hongying Du; Andrey Karasev; Pär Jönsson; Lauri Holappa; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; non-metallic inclusions; Ca treatment; stainless steel; machinability.; icke-metalliska inneslutningar; kalciumbehandling; rostfritt stål; skärbarhet.; Teknisk materialvetenskap; Materials Science and Engineering;

   Sammanfattning : In recent decades, a considerable development of steel with respect to the performance of steel has taken place, which also has resulted in large challenges to process these steel grades. Therefore, it is essential to make suitable modifications of non-metallic inclusions (NMI) in the steelmaking process and to have a good control of its characteristics to meet the target mechanical properties and to obtain a good machinability. LÄS MER

4. 3. Characterization of factors interacting in CGI machining : machinability - material microstructure - material physical properties

   Författare :Anders Berglund; Cornel Mihai Nicolescu; Tero Stjernstoft; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CGI; Compacted Graphite Iron; milling; cast iron; machinability; material microstructure; material physical properties; CGI; kompaktgrafitjärn; fräsning; gjutjärn; skärbarhet; mikrostruktur; materialegenskaper; Manufacturing engineering; Produktionsteknik;

   Sammanfattning : The Swedish truck industry is forced to find new material solutions to achieve lighter engines with increased strength. Customers and new environmental regulations demand both higher specific power and more environmentally friendly trucks, and this places a rising pressure on the manufactures. LÄS MER

5. 4. Evaluation of Non-Metallic Inclusions after Deformation and Their Effect on the Machinability of Steel

   Författare :SHUO GUO; Pär Jönsson; Andrey Karasev; Anders Tilliander; Robert Eriksson; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Steel; Heat treatment; REM-treat steel; Ce modification; Chip breakability; weight distribution of chips Non-metallic inclusions; Deformation; Electrolytic extraction; stål; värmebehandling; REM-behandlade stål; Ce modifiering; spånbrytning; viktsdistribution av spån; icke-metalliska inneslutningar; deformation; elektrolytisk extraktion.; Teknisk materialvetenskap; Materials Science and Engineering;

   Sammanfattning : The presence of non-metallic inclusions (NMIs) have critical effects on both the mechanical properties and machinability of steels. In the present thesis, one focus is to study the characteristics of deformed sulfides (MnS) for a stainless steel (3R65) and a tool steel (42CrMo4). LÄS MER