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Heat Transfer Research
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ISSN Imprimir: 1064-2285
ISSN En Línea: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v29.i4-5.50
pages 252-255

Active Method of Thermal Hardening of Cutting Details in Agricultural Machines

N. I. Kobasko
Institute of Engineering Thermophysics, National Academy of Sciences of Ukraine, Kiev

SINOPSIS

An active method of quenching of segments of 70G steel is shown to be possible during their thermal hardening. According to the traditional technology, the working parts of the segments (lateral sides with notches) are heated in high-frequency current apparatus and cooled in mineral oil, which leads to weak tensile stresses at the lateral segment sides. If the segments are cooled by strong water jets, while the bases of the segments are heated, high compressive stresses preventing quenching cracks appear at the lateral sides. The radically new technology of quenching the segments is proposed.


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