Sökning: "PCBN"

Visar resultat 1 - 5 av 6 avhandlingar innehållade ordet PCBN.

  1. 1. Wear of coated and uncoated PCBN cutting tool used in turning and milling

    Författare :Susanne Sveen; Mikael Olsson; Magnus Odén; Urban Wiklund; Högskolan Dalarna; []
    Nyckelord :PCBN; PVD coating; Wear mechanisms; Tool wear; Metal cutting; Steel Forming and Surface Engineering; Stålformning och ytteknik;

    Sammanfattning : This licentiate thesis has the main focus on evaluation of the wear of coated and uncoated polycrystalline cubic boron nitride cutting tool used in cutting operations against hardened steel. And to exam the surface finish and integrity of the work material used. LÄS MER

  3. 2. Microstructure of a cubic boron nitride tool material before and after hard turning

    Författare :Jenny Angseryd; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; EELS; cBN; microstructure; PCBN; adherent layer; EDX; wear; SEM; EFTEM; TEM;

    Sammanfattning : AbstractPolycrystalline cubic boron nitride (PCBN) materials are widely used in turning of hardened steels due to their beneficial mechanical properties like high hardness at elevated temperatures and, compared to diamond, for being more chemically stable towards iron at temperatures typical for turning operations (800-1000˚C). The wear of PCBN tools is influenced by several factors, like machining parameters, different tool geometries and varying composition of PCBN tools as well as workpiece material. LÄS MER

  4. 3. Microstructure of a cubic boron nitride tool material and its degradation during hard turning operations

    Författare :Jenny Angseryd; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; EDX; adherent layer; cBN; PCBN; SEM; TEM; EELS and APT; wear; EFTEM;

    Sammanfattning : Abstract. Polycrystalline cubic boron nitride (PCBN) materials are widely used in turning operations of hardened steels due to their beneficial mechanical properties like maintained high hardness at elevated temperatures, adequate toughness and for being more chemically stable towards iron compared to diamond at temperatures typical for turning operations. LÄS MER

  5. 4. Inclusion Characteristics and Their Link to Tool wear in Metal Cutting of Clean Steels Suitable for Automotive Applications

    Författare :Niclas Ånmark; Andrey Karasev; Pär Göran Jönsson; Thomas Björk; Jinming Zhou; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tool wear; PCBN; Machinability; Steel; Non-metallic inclusions; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : This thesis covers some aspects of hard part turning of carburised steels using a poly‑crystalline cubic boron nitride (PCBN) cutting tool during fine machining. The emphasis is on the influence of the steel cleanliness and the characteristics of non‑metallic inclusions in the workpiece on the active wear mechanisms of the cutting tool. LÄS MER

  7. 5. 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