Cr₃C₂-NiCr ЖАБЫНЫ ҮШІН HVOF ТЕРМИЯЛЫҚ БҮРКУ ПРОЦЕСІНІҢ ОҢТАЙЛЫ РЕЖИМДЕРІН ТЕОРИЯЛЫҚ ЗЕРТТЕУ ЖӘНЕ ШЕШУ

Мақалада цирконий субстратына арналған Cr₃C₂-NiCr негізіндегі жабынының теориялық зерттеулері қарастырылады. Бұл жабынды алу үшін ең тиімді әдістердің бірі болып табылатын жоғары жылдамдықты оттегіотынмен термиялық тозаңдау (HVOF) әдісі зерттелді. Жабындарды алу қалыңдығы 3–5 мм, ұзындығы 20 мм, ені 30 мм болатын цирконий субстратының бетіне 600–700 м/с тозаңдау жылдамдығымен жүзеге асты. HVOF әдісімен тозаңдау кезіндегі температура шамамен 3000 ºС, салқындату температурасы 27 ºС құрайды. Cr₃C₂-NiCr жабынының теориялық деректерін зерттей отырып, карбидті жабындар үшін жабын қалыңдығы 0,6 мм-ден аспайтын Стоун әдісімен және Бреннер мен Сендерофф теңдеулерімен HVOF өңдеуден кейінгі дамып келе жатқан және жылу кернеулері анықталды. Теориялық зерттеулердің нәтижелері бойынша Kosaku Shinoda ұсынған әдіспен тұндыру тиімділігінің мәндері табылды. Теориялық және математикалық есептеулер бойынша цирконий субстратына жағылған Cr₃C₂-NiCr жабыны үшін тұндыру тиімділігі 59,5%–69,4% аралығында болды. Осылайша, жабындар үшін тұндыру тиімділігі субстраттың қалыңдығына, ұнтақты беру жылдамдығына, сондай-ақ қолданылатын материалдың массасына және сәйкесінше бүрку өтулерінің санына байланысты екендігі анықталды.

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