Measurement of the Spherical Tip of Rockwell Indenters

    Volume 16, Issue 4 (July 1988)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Page Count: 6


    Barbato, G
    Chief and Senior Technician, Hardness Research Group, Istituto di Metrologia, “G.Colonnetti”, Torino,

    Desogus, S
    Chief and Senior Technician, Hardness Research Group, Istituto di Metrologia, “G.Colonnetti”, Torino,

    (Received 13 February 1987; accepted 18 December 1987)

    Abstract

    Recent international comparisons of primary standards of Rockwell C hardness showed that the indenter shape is largely responsible for differences in measurement results. Measurements, especially of spherical-tip shape, made by means of high-magnification (500 ×) profile projectors proved to be affected by an uncertainty that also depended on the operator. In connection with such problems, a measurement system using a rotating table centered by means of an air bearing was developed together with a method for result analysis so as to allow the evaluations required by ASTM and ISO standards to be made quickly.


    Paper ID: JTE11080J

    DOI: 10.1520/JTE11080J

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    Author
    Title Measurement of the Spherical Tip of Rockwell Indenters
    Symposium , 0000-00-00
    Committee E04