The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform

C Claudin - One of the best experts on this subject based on the ideXlab platform.

  • machining performance of pearlitic ferritic Nodular cast Iron with coated carbide and silicon nitride ceramic tools
    International Journal of Machine Tools & Manufacture, 2009
    Co-Authors: Wit Grzesik, J Rech, Krzysztof żak, C Claudin
    Abstract:

    Abstract This paper concerns the fundamental cutting characteristics obtained in the turning of the pearlitic–ferritic Nodular Iron (EN-GJS-500-7 grade with UTS=500 MPa) when using carbide tools coated with single TiAlN and multilayer TiC/Ti(C,N)/Al2O3/TiN coatings, as well as silicon nitride (Si3N4) based ceramic tools. As a competitor, a P20 uncoated carbide grade was selected. The fundamental process readings include cutting and feed forces, the tool–chip interface temperature, Peclet number, friction coefficient and the tool–chip contact length as functions of cutting parameters. In particular, the measurements of cutting temperature were carried out using conventional tool–work thermocouple method and IR thermography. It is concluded based on many process characteristics that multilayer coated and ceramic tools can substantially improve the performance of Nodular Iron machining.

Wit Grzesik - One of the best experts on this subject based on the ideXlab platform.

  • Machining performance of Nodular Iron with coated cutting tools
    International Journal of Materials & Product Technology, 2010
    Co-Authors: Wit Grzesik
    Abstract:

    This paper overviews typical machining characteristics obtained in the turning of the GJS-500-7 Nodular Iron when using cutting tools coated with single TiAlN and multiple TiC/Ti(C,N) /Al2O3/TiN layers and P20 uncoated competitors. The experimental data presented include the cutting forces, the average interface temperature, friction and contact length, as well as extended analysis of surface finish. It is concluded based on many machinability factors that multilayer coated tools outperform the other tools applied.

  • machining performance of pearlitic ferritic Nodular cast Iron with coated carbide and silicon nitride ceramic tools
    International Journal of Machine Tools & Manufacture, 2009
    Co-Authors: Wit Grzesik, J Rech, Krzysztof żak, C Claudin
    Abstract:

    Abstract This paper concerns the fundamental cutting characteristics obtained in the turning of the pearlitic–ferritic Nodular Iron (EN-GJS-500-7 grade with UTS=500 MPa) when using carbide tools coated with single TiAlN and multilayer TiC/Ti(C,N)/Al2O3/TiN coatings, as well as silicon nitride (Si3N4) based ceramic tools. As a competitor, a P20 uncoated carbide grade was selected. The fundamental process readings include cutting and feed forces, the tool–chip interface temperature, Peclet number, friction coefficient and the tool–chip contact length as functions of cutting parameters. In particular, the measurements of cutting temperature were carried out using conventional tool–work thermocouple method and IR thermography. It is concluded based on many process characteristics that multilayer coated and ceramic tools can substantially improve the performance of Nodular Iron machining.

Wang Zhi-ping - One of the best experts on this subject based on the ideXlab platform.

  • Experimental research of laser shock strengthening Nodular Iron crankshaft
    Modern Manufacturing Engineering, 2010
    Co-Authors: Wang Zhi-ping
    Abstract:

    In order to study the effect of Laser Shock Processing(LSP)on the properties of Nodular Iron,Nodular Iron crankshaft was processed with Nd:glass laser with the wavelength of 1054 nm and pulse width of 23 ns,and its micro-hardness、residual stress and the fatigue intension were examined and analyzed.The experimental results show that with laser power density of 10.6 GW/cm2,Laser Shock Processing(LSP) improves hardness and residual stress of Nodular Iron crankshaft significantly,surface micro-hardness increases by up to 65%～75% and the compressive residual stress on the surface of laser shocked area reaches up to-400 MPa,using life increases about 150%.The experiment results show that the effect of laser shock evidently strengthens the Nodular Iron crankshaft.

  • System of Computer Automatically Inspecting the Graphite in Nodular Iron with Image Technology
    Journal of Harbin University of Science and Technology, 2003
    Co-Authors: Wang Zhi-ping
    Abstract:

    Based on image processing technolgy, this paper introduced the research and development of system for recognizing and inspecting graphite in Nodular Iron, and the micrograph is processed and recognized by microcomputer in this system. The number and size of graphite Nodular in Nodular Iron can be inspected automatically and quickly. This makes the inspection much more reasonable and accurate. So this method can be used widely.

A. Torres-acosta - One of the best experts on this subject based on the ideXlab platform.

  • Effects of austempering temperature on fatigue crack rate propagation in a series of modified (Cu, Ni, and/or Mo) Nodular Irons
    Journal of Materials Engineering and Performance, 2002
    Co-Authors: M. Martínez-madrid, R. Rodríguez-t, V. M. Castaño, M. A. Costa, A. Torres-acosta
    Abstract:

    Studies on austempered Nodular cast Irons were carried out to establish the optimum isothermic heat treatment at a given chemical composition that rendered the highest fatigue crack propagation resistance. Seven Nodular Iron chemical compositions with different concentrations of copper, nickel, and or molybdenum were tested at three austempering temperatures achieving ausferritic microstructures. Three-point bend tests for crack growth rates were performed at room temperature in a close loop servo hydraulic machine. Crack opening displacement measurements were performed using a controlled displacement telescope. A simple linear statistical analysis indicated that the lower the austempering isothermal temperature, the higher the fatigue strength of the alloys. Cu and Mo additions along with a good spheroidicity of graphite nodules in the Iron favored this effect.

Wu Tieming - One of the best experts on this subject based on the ideXlab platform.

  • Fatigue Property of a Cold-resistant Nodular Iron for Wind-driven Generator Hub
    The Heat Treatment, 2013
    Co-Authors: Wu Tieming
    Abstract:

    A nonstandard cold-resistant Nodular Iron which may be used for hubs of wind-driven generator was trial-produced by using such measures as control of the component of molten Iron and deoxidizing sequence.The effect of matrix structure and graphite form was investigated on fatigue strength and fracture toughness of the Nodular Iron.The results show that such properties of the Nodular Iron are on a level with those of Nodular Iron of type QT400-18,and that in order to obtain desired fatigue property,the microstructure of the Nodular Iron should consist of ferrite matrix with pearlite less than 5%,spheroidal graphite of form Ⅵ,temper carbon of formⅤ,with the graphite size class number being equal to or more than 6,and spheroidized graphite class number being equal to or less than 3.