10.14489/td.2015.07.pp.047-049

2015, 07 July

DOI: 10.14489/td.2015.07.pp.047-049

Maksimov A. B.
NONDESTRUCTIVE TESTING THE HARDNESS OF SURFACE OF PLIERS YAWS
(pp. 47-49)

Abstract. The nondestructive control magnetic fluxgate method is used for definition of hardness of pliers jaws. There are represented the equations of regression, which relate the coercive force of the yaws with its hardness. It’s shown the feasibility of acceptance testing of hardness pliers yaws with nondestructive method for mass production. To reduce the rejection of products with mismatch hardness, it is suggested to choose tempering temperature in dependence with the value of carbon equivalent.It is recommended at the incoming inspection to divide metal into 3 groups via the carbon equivalent: “normal”, “soft” and “hard”. Separation of metal into groups with an input control is performed according to the chemical composition due to the attached certificate, and nondestructive checks.

Keywords: steel, round pliers, Rockwell hardness, coercive force, regression equation, carbon equivalent, heat treatm

+ - About the Authors Click to collapse

A. B. Maksimov
Kerch State Mariteme Technological University, Kerch, Russia. E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

1. Bida G. V. (2006). Magnetic control of hardened and tempered parts made of carbon and low alloy steels (review). Defektoskopiia, (7), pp. 15-27.
2. Makarov A. V., Savrii R. A., Gorkunov E. S., Tabachnikov T. N. (2007). Features of magnetic testing of mechanical properties of high carbon steel with a structure of lamellar pearlite. Defektoskopiia, (7), pp. 22-34.
3. Maksimov A. B. (2013). Determination of products hardness made of tool steel using the coercive force. Proceedings of the IX International scientific and practical conference «The scientific space of Europe – 2013», city of Pzhemysl (Poland), 7 – 15 April 2013. Vol. 35, pp. 38-40.
4. Maksimov A. B. (2013). Determining the steel grade of steel rods with coercimeter «SILA». Tekhnicheskaia diagnostika i nerazrushaiushchii kontrol', (2), pp. 47-49.

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