METHOD OF DETERMINING DEPTH OF CRACKS ON SURFACE OF METALLIC ARTICLES WITH BUILT-UP LAYER

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to measurement technique and can be used u0434u043bu00a0 u043eu043fu0440u0435u0434u0435u043bu0435u043du0438u00a0 depth of cracks on the surface of metal products with u043du0430u043fu043bu0430u0432u043bu0435u043du043du044bu043c layer m, in particular rolling rolls. the purpose of u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 - improved accuracy in determining the depth of cracks is greater than the thickness of the u043du0430u043fu043bu0430u0432u043bu0435u043du043du043eu0433u043e u0441u043bu043eu00a0.the depth of the cracks u043eu043fu0440u0435u0434u0435u043bu00a0u044eu0442 measurement voltage potentials at the surface of a defective area, and further u0438u0437u043cu0435u0440u00a0u044eu0442 difference potentials u n u m and u er sea u0442u0432u0435u0442u0441u0442u0432u0435u043du043du043e on u043du0430u043fu043bu0430u0432u043bu0435u043du043du043eu0439 surface, on the surface of the core material and the surface of the template, after which the thickness h n u043du0430u043fu043bu0430u0432u043bu0435u043du043du043eu0433u043e u0441u043bu043eu00a0 u043eu043fu0440u0435u0434u0435u043bu00a0 by the depth of the cracks, u0438u0441u043fu043eu043bu044cu0437u0443u00a0 dependence of h = (u th / u n) u def + (1 - u n / a n n u m).1, table 2).