Agricultural Engineering, Volume 47

SURFACE ENGINEERING OF SLIDER VALVES OF FLUID POWER MOTORS MADE OF TOOL STEELS BY USING BORIDING SATURATION MIXTURE

Valery Mikhailovich Konstantinov, Vladimir Georgievich Dashkevich, Aleksey Vladimirovich Kovalchuk
Belorussian national technical university, Minsk, Belarus

Abstract

The technique for producing compact boride layers for the effective hardening of slider valves of fluid-power motors and distributives valve of Belarusian origin made of tool steel has been designed. The effect of temperature and time parameters in boriding powder saturation mixture on the thickness and phase composition of the diffusion layers and the morphology of the upper boriding layer and the intermediate layer on steels У8А (C80W1) and 9ХС (90CrSi) has been researched. Furthermore, the impact of boriding on the dimensional accuracy of slider valves has been investigated.

Keyword(s): boriding, phase boundary, frangibility, shear stress, collapse load, dimensional accuracy.


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Agricultural Engineering ISSN 1392-1134 / eISSN 2345-0371

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