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Heat treatment in a protective atmosphere as a means of increasing the wear resistance of hard-metal tools

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Soviet Powder Metallurgy and Metal Ceramics Aims and scope

Conclusions

An x-ray structural study has shown that heat treatment in a protective atmosphere with slow heating and cooling lowers the level of thermal microstresses in the WC phase of a hard metal. After the removal of the cobalt phase, the thermal microstress in the WC phase of a titanium-tungsten alloy falls by 25–35%. The cobalt phase has a strong compressing action on the tungsten carbide. Microstress variations affect the physicomechanical properties of a hard metal. In the lathe-turning of type 45 steel with titanium nitride-coated hardmetal tool tips (in the machining speed range v = 50–300 m/min) tool life is up to 70% longer than that attainable with uncoated tools. With increasing tool flank wear, the beneficial effect of the coating diminishes.

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Literature cited

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Authors and Affiliations

  1. Armenian Scientific-Research Institute of Machine Construction, USSR

    G. S. Ovsepyan

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  1. G. S. Ovsepyan
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Translated from Poroshkovaya Metallurgiya, No. 1(217), pp. 19–23, January, 1981.

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Ovsepyan, G.S. Heat treatment in a protective atmosphere as a means of increasing the wear resistance of hard-metal tools. Powder Metall Met Ceram 20, 15–18 (1981). https://doi.org/10.1007/BF00791902

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  • DOI: https://doi.org/10.1007/BF00791902

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