4 research outputs found

    Application of chemography for evaluating the workability of hard alloy cutting plates

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    Abstract: An approach to assessing the performance of carbide cutting inserts based on fixing changes in the defectiveness of its structure is proposed. The assessment is based on the phenomenon of activation of inhomogeneous chemical processes at extremely low concentrations of substances that occur in places of excessive surface activity in the structure of the material. The effect is determined by the initial imperfection of the structure of the surface layer of the material and the increase in the defectiveness of the carbide material under the influence of thermobaric loading during the operation of the tool. It is proposed to use the black index of the chemographic image of the studied object as a criterion for the array of structural defects, the value of which indicates the level of structural violations and internal defects in the material

    Application of chemography for evaluating the workability of hard alloy cutting plates

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    Abstract. An approach to assessing the performance of carbide cutting inserts based on fixing changes in the defectiveness of its structure is proposed. The assessment is based on the phenomenon of activation of inhomogeneous chemical processes at extremely low concentrations of substances that occur in places of excessive surface activity in the structure of the material. The effect is determined by the initial imperfection of the structure of the surface layer of the material and the increase in the defectiveness of the carbide material under the influence of thermobaric loading during the operation of the tool. It is proposed to use the black index of the chemographic image of the studied object as a criterion for the array of structural defects, the value of which indicates the level of structural violations and internal defects in the material.Abstract: An approach to assessing the performance of carbide cutting inserts based on fixing changes in the defectiveness of its structure is proposed. The assessment is based on the phenomenon of activation of inhomogeneous chemical processes at extremely low concentrations of substances that occur in places of excessive surface activity in the structure of the material. The effect is determined by the initial imperfection of the structure of the surface layer of the material and the increase in the defectiveness of the carbide material under the influence of thermobaric loading during the operation of the tool. It is proposed to use the black index of the chemographic image of the studied object as a criterion for the array of structural defects, the value of which indicates the level of structural violations and internal defects in the material

    ΠžΡ†Ρ–Π½ΠΊΠ° Ρ€ΠΎΠ·Π²ΠΈΡ‚ΠΊΡƒ ΡƒΡˆΠΊΠΎΠ΄ΠΆΠ΅Π½ΡŒ Ρ– часу настання Π²Ρ–Π΄ΠΌΠΎΠ²ΠΈ Ρ€Ρ–Π·Π°Π»ΡŒΠ½ΠΈΡ… пластин Ρ–Π· Ρ‚Π²Π΅Ρ€Π΄ΠΈΡ… сплавів Ρ– Π½Π°Π΄Ρ‚Π²Π΅Ρ€Π΄ΠΈΡ… ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡ‚Ρ–Π² ΠΌΠ΅Ρ‚ΠΎΠ΄Π°ΠΌΠΈ Ρ…Π΅ΠΌΠΎΠ³Ρ€Π°Ρ„Ρ–Ρ–

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    The results of theoretical and experimental studies aimed at identifying hidden defects in the structure of hard alloys and superhard composites used in the manufacture of cutting tools in order to control and predict gradual and sudden failures of cutting inserts.Damage control of cutting inserts is carried out by microscopic analysis. Deeper damage to the structure can be detected using the method of chemographic imaging. The proposed method is based on obtaining photographs of the oxidative reactions of materials of ultra-low concentrations occurring on the surface of solids under thermobaric loading.Before the moment of a sharp release of the energy of destruction, chemical processes of ultra-low concentrations are activated. Chemography allows to fix the zones where the incipient microcracks and microdefects are ready to actively develop, which can lead to the onset of macrodamage and failure to work.The chemographic image of the plate obtained as a result of the study is compared with the reference sample, as a result of which it is possible to assess the initial defect state of the material and predict the further period of the plate’s operation.The criterion for the existing defects and imperfections in the structure is the change in the blackness index of the chemographic image, theΒ minimum value of which indicates aΒ minimum of structural defects and internal defects in the material under study.The results allow to propose a new method for controlling the surface of cutting plates, which can be easily implemented in any machine shop, which makes its application very promisingΠŸΡ€Π΅Π΄ΡΡ‚Π°Π²Π»Π΅Π½Ρ‹ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ Ρ‚Π΅ΠΎΡ€Π΅Ρ‚ΠΈΠΊΠΎ-ΡΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½Ρ‹Ρ… исслСдований, Π½Π°ΠΏΡ€Π°Π²Π»Π΅Π½Π½Ρ‹Ρ… Π½Π° установлСниС скрытых Π΄Π΅Ρ„Π΅ΠΊΡ‚ΠΎΠ² Π² структурС  Ρ‚Π²Π΅Ρ€Π΄Ρ‹Ρ… сплавов ΠΈ свСрхтвСрдых ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡ‚ΠΎΠ², примСняСмых ΠΏΡ€ΠΈ ΠΈΠ·Π³ΠΎΡ‚ΠΎΠ²Π»Π΅Π½ΠΈΠΈ Ρ€Π΅ΠΆΡƒΡ‰ΠΈΡ… инструмСнтов с Ρ†Π΅Π»ΡŒΡŽ контроля ΠΈ прогнозирования постСпСнных ΠΈ Π²Π½Π΅Π·Π°ΠΏΠ½Ρ‹Ρ… ΠΎΡ‚ΠΊΠ°Π·ΠΎΠ² Ρ€Π΅ΠΆΡƒΡ‰ΠΈΡ… пластин.ΠšΠΎΠ½Ρ‚Ρ€ΠΎΠ»ΡŒ ΠΏΠΎΠ²Ρ€Π΅ΠΆΠ΄Π΅Π½ΠΈΠΉ Ρ€Π΅ΠΆΡƒΡ‰ΠΈΡ… пластин осущСствляСтся ΠΏΡƒΡ‚Π΅ΠΌ микроскопичСского Π°Π½Π°Π»ΠΈΠ·Π°. ВыявлСниС Π±ΠΎΠ»Π΅Π΅ Π³Π»ΡƒΠ±ΠΎΠΊΠΈΡ… ΠΏΠΎΠ²Ρ€Π΅ΠΆΠ΄Π΅Π½ΠΈΠΉ структуры ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ осущСствлСно с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ ΠΌΠ΅Ρ‚ΠΎΠ΄Π° хСмографичСской сьСмки. ΠŸΡ€Π΅Π΄Π»ΠΎΠΆΠ΅Π½Π½Ρ‹ΠΉ ΠΌΠ΅Ρ‚ΠΎΠ΄ основан Π½Π° ΠΏΠΎΠ»ΡƒΡ‡Π΅Π½ΠΈΠΈ фотоснимков ΠΎΠΊΠΈΡΠ»ΠΈΡ‚Π΅Π»ΡŒΠ½Ρ‹Ρ… Ρ€Π΅Π°ΠΊΡ†ΠΈΠΉ ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»ΠΎΠ² свСрхмалых ΠΊΠΎΠ½Ρ†Π΅Π½Ρ‚Ρ€Π°Ρ†ΠΈΠΉ, ΠΏΡ€ΠΎΡ‚Π΅ΠΊΠ°ΡŽΡ‰ΠΈΡ… Π½Π° повСрхности Ρ‚Π²Π΅Ρ€Π΄Ρ‹Ρ… Ρ‚Π΅Π» ΠΏΡ€ΠΈ тСрмобаричСском Π½Π°Π³Ρ€ΡƒΠΆΠ΅Π½ΠΈΠΈ.ΠŸΠ΅Ρ€Π΅Π΄ наступлСниСм ΠΌΠΎΠΌΠ΅Π½Ρ‚Π° Ρ€Π΅Π·ΠΊΠΎΠ³ΠΎ высвобоТдСния энСргии Ρ€Π°Π·Ρ€ΡƒΡˆΠ΅Π½ΠΈΡ, Π°ΠΊΡ‚ΠΈΠ²ΠΈΠ·ΠΈΡ€ΡƒΡŽΡ‚ΡΡ  химичСскиС процСссы свСрхмалых ΠΊΠΎΠ½Ρ†Π΅Π½Ρ‚Ρ€Π°Ρ†ΠΈΠΉ. Π₯Смография позволяСт Ρ„ΠΈΠΊΡΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ Π·ΠΎΠ½Ρ‹, Π³Π΄Π΅ Π·Π°Ρ€ΠΎΠ΄ΠΈΠ²ΡˆΠΈΠ΅ΡΡ ΠΌΠΈΠΊΡ€ΠΎΡ‚Ρ€Π΅Ρ‰ΠΈΠ½Ρ‹ ΠΈ ΠΌΠΈΠΊΡ€ΠΎΠ΄Π΅Ρ„Π΅ΠΊΡ‚Ρ‹ Π³ΠΎΡ‚ΠΎΠ²Ρ‹ Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎ Ρ€Π°Π·Π²ΠΈΠ²Π°Ρ‚ΡŒΡΡ, Ρ‡Ρ‚ΠΎ ΠΌΠΎΠΆΠ΅Ρ‚ привСсти ΠΊ Β Π½Π°ΡΡ‚ΡƒΠΏΠ»Π΅Π½ΠΈΡŽ макроповрСТдСния ΠΈ ΠΎΡ‚ΠΊΠ°Π·Π°Π² Π² Ρ€Π°Π±ΠΎΡ‚Π΅.ΠŸΠΎΠ»ΡƒΡ‡Π΅Π½Π½Ρ‹Π΅ Π² Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π΅ исслСдования хСмографичСскиС ΠΈΠ·ΠΎΠ±Ρ€Π°ΠΆΠ΅Π½ΠΈΠ΅ пластины ΡΡ€Π°Π²Π½ΠΈΠ²Π°ΡŽΡ‚ΡΡ с эталонным ΠΎΠ±Ρ€Π°Π·Ρ†ΠΎΠΌ, Π² Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π΅ Ρ‡Π΅Π³ΠΎ ΠΌΠΎΠΆΠ½ΠΎ Π΄Π°Ρ‚ΡŒ ΠΎΡ†Π΅Π½ΠΊΡƒ Π½Π°Ρ‡Π°Π»ΡŒΠ½ΠΎΠΌΡƒ Π΄Π΅Ρ„Π΅ΠΊΡ‚Π½ΠΎΠΌΡƒ ΡΠΎΡΡ‚ΠΎΡΠ½ΠΈΡŽ ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»Π° ΠΈ ΡΠΏΡ€ΠΎΠ³Π½ΠΎΠ·ΠΈΡ€ΠΎΠ²Π°Ρ‚ΡŒ дальнСйший ΠΏΠ΅Ρ€ΠΈΠΎΠ΄ эксплуатации пластины.ΠšΡ€ΠΈΡ‚Π΅Ρ€ΠΈΠ΅ΠΌ ΠΈΠΌΠ΅ΡŽΡ‰ΠΈΡ…ΡΡ Π΄Π΅Ρ„Π΅ΠΊΡ‚ΠΎΠ² ΠΈ Π½Π΅ΡΠΎΠ²Π΅Ρ€ΡˆΠ΅Π½ΡΡ‚Π² структуры, являСтся ΠΈΠ·ΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ индСкса Ρ‡Π΅Ρ€Π½ΠΎΡ‚Ρ‹ хСмографичСского изобраТСния, минимальноС Π·Π½Π°Ρ‡Π΅Π½ΠΈΠ΅ ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠ³ΠΎ ΡΠ²ΠΈΠ΄Π΅Ρ‚Π΅Π»ΡŒΡΡ‚Π²ΡƒΠ΅Ρ‚ ΠΎ ΠΌΠΈΠ½ΠΈΠΌΡƒΠΌΠ΅ структурных Π½Π°Ρ€ΡƒΡˆΠ΅Π½ΠΈΠΉ ΠΈ Π²Π½ΡƒΡ‚Ρ€Π΅Π½Π½ΠΈΡ… Π΄Π΅Ρ„Π΅ΠΊΡ‚ΠΎΠ² Π² исслСдуСмом ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»Π΅.ΠŸΠΎΠ»ΡƒΡ‡Π΅Π½Π½Ρ‹Π΅ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡŽΡ‚ ΠΏΡ€Π΅Π΄Π»ΠΎΠΆΠΈΡ‚ΡŒ Π½ΠΎΠ²Ρ‹ΠΉ ΠΌΠ΅Ρ‚ΠΎΠ΄ контроля повСрхности Ρ€Π΅ΠΆΡƒΡ‰ΠΈΡ… пластин, ΠΊΠΎΡ‚ΠΎΡ€Ρ‹ΠΉ ΠΌΠΎΠΆΠ΅Ρ‚ Π±Ρ‹Ρ‚ΡŒ Π»Π΅Π³ΠΊΠΎ Ρ€Π΅Π°Π»ΠΈΠ·ΠΎΠ²Π°Π½ Π² любом мСханичСском Ρ†Π΅Ρ…Ρƒ, Ρ‡Ρ‚ΠΎ Π΄Π΅Π»Π°Π΅Ρ‚ Π΅Π³ΠΎ ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ вСсьма пСрспСктивным.ΠŸΡ€Π΅Π΄ΡΡ‚Π°Π²Π»Π΅Π½Ρ– Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΈ Ρ‚Π΅ΠΎΡ€Π΅Ρ‚ΠΈΠΊΠΎ-Π΅ΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½ΠΈΡ… Π΄ΠΎΡΠ»Ρ–Π΄ΠΆΠ΅Π½ΡŒ, основаних Π½Π° діагностиці структурних Π΄Π΅Ρ„Π΅ΠΊΡ‚Ρ–Π² Ρ‚Π²Π΅Ρ€Π΄ΠΈΡ… сплавів Ρ‚Π° Π½Π°Π΄Ρ‚Π²Π΅Ρ€Π΄ΠΈΡ… ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡ‚Ρ–Π², які Π²ΠΈΠΊΠΎΡ€ΠΈΡΡ‚ΠΎΠ²ΡƒΡŽΡ‚ΡŒΡΡ ΠΏΡ€ΠΈ Π²ΠΈΠ³ΠΎΡ‚ΠΎΠ²Π»Π΅Π½Π½Ρ– Ρ€Ρ–ΠΆΡƒΡ‡ΠΈΡ… інструмСнтів, Π· ΠΌΠ΅Ρ‚ΠΎΡŽ ΠΊΠΎΠ½Ρ‚Ρ€ΠΎΠ»ΡŽ Ρ‚Π° прогнозування поступових Ρ‚Π° Ρ€Π°ΠΏΡ‚ΠΎΠ²ΠΈΡ… Π²Ρ–Π΄ΠΌΠΎΠ² Ρ€Ρ–ΠΆΡƒΡ‡ΠΈΡ… пластин.ΠšΠΎΠ½Ρ‚Ρ€ΠΎΠ»ΡŒ ΠΏΠΎΠ²Π΅Ρ€Ρ…Π½Ρ– Ρ€Ρ–ΠΆΡƒΡ‡ΠΎΡ— пластини Π·Π΄Ρ–ΠΉΡΠ½ΡŽΡ”Ρ‚ΡŒΡΡ, як ΠΏΡ€Π°Π²ΠΈΠ»ΠΎ, Π·Π° допомогою мікроскопічного Π°Π½Π°Π»Ρ–Π·Ρƒ. ВиявлСння Π±Ρ–Π»ΡŒΡˆ Π³Π»ΠΈΠ±ΠΎΠΊΠΈΡ… ΠΏΠΎΡˆΠΊΠΎΠ΄ΠΆΠ΅Π½ΠΈΡ… структур ΠΌΠΎΠΆΠ΅ Π±ΡƒΡ‚ΠΈ Π²ΠΈΠΊΠΎΠ½Π°Π½ΠΎ Π·Π° допомогою ΠΌΠ΅Ρ‚ΠΎΠ΄Ρƒ Ρ…Π΅ΠΌΠΎΠ³Ρ€Π°Ρ„Ρ–Ρ‡Π½ΠΎΡ— Π·ΠΉΠΎΠΌΠΊΠΈ. Π—Π°ΠΏΡ€ΠΎΠΏΠΎΠ½ΠΎΠ²Π°Π½ΠΈΠΉ ΠΌΠ΅Ρ‚ΠΎΠ΄ заснований Π½Π° ΠΎΡ‚Ρ€ΠΈΠΌΠ°Π½Π½Ρ– Ρ„ΠΎΡ‚ΠΎΠ·Π½Ρ–ΠΌΠΊΡ–Π² ΠΎΠΊΠΈΡΠ»ΡŽΠ²Π°Π»ΡŒΠ½ΠΈΡ… Ρ€Π΅Π°ΠΊΡ†Ρ–ΠΉ ΠΌΠ°Ρ‚Π΅Ρ€Ρ–Π°Π»Ρ–Π² Π½Π°Π΄ΠΌΠ°Π»ΠΈΡ… ΠΊΠΎΠ½Ρ†Π΅Π½Ρ‚Ρ€Π°Ρ†Ρ–ΠΉ, Ρ‰ΠΎ ΠΏΡ€ΠΎΡ‚Ρ–ΠΊΠ°ΡŽΡ‚ΡŒ Π½Π° ΠΏΠΎΠ²Π΅Ρ€Ρ…Π½Ρ– Ρ‚Π²Π΅Ρ€Π΄ΠΎΠ³ΠΎ Ρ‚Ρ–Π»Π° ΠΏΡ€ΠΈ Ρ‚Π΅Ρ€ΠΌΠΎΠ±Π°Ρ€ΠΈΡ‡Π½ΠΎΠΌΡƒ Π½Π°Π²Π°Π½Ρ‚Π°ΠΆΠ΅Π½Π½Ρ–.Π₯Смографія дозволяє фіксувати Π·ΠΎΠ½ΠΈ, Π΄Π΅ ΠΌΡ–ΠΊΡ€ΠΎΡ‚Ρ€Ρ–Ρ‰ΠΈΠ½ΠΈ Ρ‚Π° ΠΌΡ–ΠΊΡ€ΠΎΠ΄Π΅Ρ„Π΅ΠΊΡ‚ΠΈ, Ρ‰ΠΎ Π·Π°Ρ€ΠΎΠ΄ΠΆΡƒΡŽΡ‚ΡŒΡΡ, Π³ΠΎΡ‚ΠΎΠ²Ρ– Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎ розвиватися, Ρ‰ΠΎ Π½Π΅ΠΎΠ΄ΠΌΡ–Π½Π½ΠΎ ΠΏΡ€ΠΈΠ·Π²ΠΎΠ΄ΠΈΡ‚ΡŒ Ρƒ ΠΌΠ°ΠΉΠ±ΡƒΡ‚Π½ΡŒΠΎΠΌΡƒ Π΄ΠΎ ΠΌΠ°ΠΊΡ€ΠΎΠΏΠΎΡˆΠΊΠΎΠ΄ΠΆΠ΅Π½Π½Ρ Ρ‚Π° Π²Ρ–Π΄ΠΌΠΎΠ²ΠΈ Π² Ρ€ΠΎΠ±ΠΎΡ‚Ρ–.ΠžΡ‚Ρ€ΠΈΠΌΠ°Π½Ρ– Π² Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ– дослідТСння Ρ…Π΅ΠΌΠΎΠ³Ρ€Π°Ρ„Ρ–Ρ‡Π½Ρ– зобраТСння пластини ΠΏΠΎΡ€Ρ–Π²Π½ΡŽΡŽΡ‚ΡŒΡΡ Π· Π΅Ρ‚Π°Π»ΠΎΠ½Π½ΠΈΠΌ зобраТСнням, Ρ‰ΠΎ Π΄Π°Ρ” ΠΌΠΎΠΆΠ»ΠΈΠ²Ρ–ΡΡ‚ΡŒ Π΄Π°Ρ‚ΠΈ ΠΎΡ†Ρ–Π½ΠΊΡƒ ΠΏΠΎΡ‡Π°Ρ‚ΠΊΠΎΠ²ΠΎΠΌΡƒ Π΄Π΅Ρ„Π΅ΠΊΡ‚Π½ΠΎΠΌΡƒ стану ΠΌΠ°Ρ‚Π΅Ρ€Ρ–Π°Π»Ρƒ Ρ‚Π° спрогнозувати подальший ΠΏΠ΅Ρ€Ρ–ΠΎΠ΄ Сксплуатації пластин.ΠšΡ€ΠΈΡ‚Π΅Ρ€Ρ–Ρ”ΠΌ наявних Π΄Π΅Ρ„Π΅ΠΊΡ‚Ρ–Π² Ρ‚Π° нСдосконалостСй структур Ρ” Π·ΠΌΡ–Π½Π° індСксів Ρ‡ΠΎΡ€Π½ΠΎΡ‚ΠΈ Ρ…Π΅ΠΌΠΎΠ³Ρ€Π°Ρ„Ρ–Ρ‡Π½ΠΎΠ³ΠΎ зобраТСння, ΠΌΡ–Π½Ρ–ΠΌΠ°Π»ΡŒΠ½Π΅ значСння якого ΡΠ²Ρ–Π΄Ρ‡ΠΈΡ‚ΡŒ ΠΏΡ€ΠΎ ΠΌΡ–Π½Ρ–ΠΌΡƒΠΌ структурних ΠΏΠΎΡ€ΡƒΡˆΠ΅Π½ΡŒ Ρ‚Π° Π²Π½ΡƒΡ‚Ρ€Ρ–ΡˆΠ½Ρ–Ρ… Π΄Π΅Ρ„Π΅ΠΊΡ‚Ρ–Π² Ρƒ дослідТуваних ΠΌΠ°Ρ‚Π΅Ρ€Ρ–Π°Π»Π°Ρ….ΠžΡ‚Ρ€ΠΈΠΌΠ°Π½Ρ– Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚ΠΈ Π΄ΠΎΠ·Π²ΠΎΠ»ΡΡŽΡ‚ΡŒ Π·Π°ΠΏΡ€ΠΎΠΏΠΎΠ½ΡƒΠ²Π°Ρ‚ΠΈ Π½ΠΎΠ²ΠΈΠΉ ΠΎΡ€ΠΈΠ³Ρ–Π½Π°Π»ΡŒΠ½ΠΈΠΉ ΠΌΠ΅Ρ‚ΠΎΠ΄ ΠΊΠΎΠ½Ρ‚Ρ€ΠΎΠ»ΡŽ ΠΏΠΎΠ²Π΅Ρ€Ρ…Π½Ρ– Ρ€Ρ–ΠΆΡƒΡ‡ΠΈΡ… пластин, який ΠΌΠΎΠΆΠ΅ Π±ΡƒΡ‚ΠΈ Π»Π΅Π³ΠΊΠΎ Ρ€Π΅Π°Π»Ρ–Π·ΠΎΠ²Π°Π½ΠΈΠΉ Ρƒ Π±ΡƒΠ΄ΡŒ-якому ΠΌΠ΅Ρ…Π°Π½Ρ–Ρ‡Π½ΠΎΠΌΡƒ Ρ†Π΅Ρ…Ρƒ, Ρ‰ΠΎ Ρ€ΠΎΠ±ΠΈΡ‚ΡŒ ΠΉΠΎΠ³ΠΎ застосування Ρ†Ρ–Π»ΠΊΠΎΠΌ пСрспСктивни

    Estimation of Damage Development and the TIME of Failure of Cutting Inserts Made of Hard Alloys and Superhard Composites by Chemography Methods

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    The results of theoretical and experimental studies aimed at identifying hidden defects in the structure of hard alloys and superhard composites used in the manufacture of cutting tools in order to control and predict gradual and sudden failures of cutting inserts.Damage control of cutting inserts is carried out by microscopic analysis. Deeper damage to the structure can be detected using the method of chemographic imaging. The proposed method is based on obtaining photographs of the oxidative reactions of materials of ultra-low concentrations occurring on the surface of solids under thermobaric loading.Before the moment of a sharp release of the energy of destruction, chemical processes of ultra-low concentrations are activated. Chemography allows to fix the zones where the incipient microcracks and microdefects are ready to actively develop, which can lead to the onset of macrodamage and failure to work.The chemographic image of the plate obtained as a result of the study is compared with the reference sample, as a result of which it is possible to assess the initial defect state of the material and predict the further period of the plate's operation.The criterion for the existing defects and imperfections in the structure is the change in the blackness index of the chemographic image, the minimum value of which indicates a minimum of structural defects and internal defects in the material under study.The results allow to propose a new method for controlling the surface of cutting plates, which can be easily implemented in any machine shop, which makes its application very promisin
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