M. M. Prokopiv, Yu. P. Ushchapovskyi, O. V. Kharchenko, H. M. Kramar, L. H. Bodrova, H. P. Kysla
{"title":"真空压缩烧结过程中气体压力增长速率对VK6M硬质合金组织和性能的影响","authors":"M. M. Prokopiv, Yu. P. Ushchapovskyi, O. V. Kharchenko, H. M. Kramar, L. H. Bodrova, H. P. Kysla","doi":"10.3103/S1063457623020090","DOIUrl":null,"url":null,"abstract":"<p>Using the technology of vacuum compression sintering, which makes it possible to obtain hard alloys with a high level of mechanical and operational properties, the influence of gas pressure growth rates of 0.08, 0.2, and 0.5 MPa/min to 5 MPa during vacuum compression sintering on the structure and properties of the VK6M fine grained hard alloy is investigated. A positive effect of increasing the rate of gas pressure growth on the ultimate flexural strength and operational stability due to obtaining a structure with finer graines (<i>d</i><sub>WC</sub> = 1.24 μm), reducing the residual microporosity to A1 0.02, increasing the shape factor of carbide grains to 0.84, and decreasing the intensity of gas desorption by a factor of 2.5–7.0 is established. The ultimate flexural strength of the alloy sintered at a gas pressure growth rate of 0.5 MPa/min is 1.35 times higher compared to that of the alloy sintered at a gas pressure growth rate of 0.08 MPa/min and 1.5 times higher compared to that of the alloy sintered in a vacuum, while the relative operational stability against rough milling in the first case is higher by 1.35 and 1.8 times compared to those in the corresponding other two cases, respectively.</p>","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"45 2","pages":"118 - 125"},"PeriodicalIF":1.2000,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Influence of the Rate of Gas Pressure Growth during Vacuum Compression Sintering on the Structure and Properties of the VK6M Hard Alloy\",\"authors\":\"M. M. Prokopiv, Yu. P. Ushchapovskyi, O. V. Kharchenko, H. M. Kramar, L. H. Bodrova, H. P. Kysla\",\"doi\":\"10.3103/S1063457623020090\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Using the technology of vacuum compression sintering, which makes it possible to obtain hard alloys with a high level of mechanical and operational properties, the influence of gas pressure growth rates of 0.08, 0.2, and 0.5 MPa/min to 5 MPa during vacuum compression sintering on the structure and properties of the VK6M fine grained hard alloy is investigated. A positive effect of increasing the rate of gas pressure growth on the ultimate flexural strength and operational stability due to obtaining a structure with finer graines (<i>d</i><sub>WC</sub> = 1.24 μm), reducing the residual microporosity to A1 0.02, increasing the shape factor of carbide grains to 0.84, and decreasing the intensity of gas desorption by a factor of 2.5–7.0 is established. The ultimate flexural strength of the alloy sintered at a gas pressure growth rate of 0.5 MPa/min is 1.35 times higher compared to that of the alloy sintered at a gas pressure growth rate of 0.08 MPa/min and 1.5 times higher compared to that of the alloy sintered in a vacuum, while the relative operational stability against rough milling in the first case is higher by 1.35 and 1.8 times compared to those in the corresponding other two cases, respectively.</p>\",\"PeriodicalId\":670,\"journal\":{\"name\":\"Journal of Superhard Materials\",\"volume\":\"45 2\",\"pages\":\"118 - 125\"},\"PeriodicalIF\":1.2000,\"publicationDate\":\"2023-05-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Superhard Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.3103/S1063457623020090\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Superhard Materials","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.3103/S1063457623020090","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Influence of the Rate of Gas Pressure Growth during Vacuum Compression Sintering on the Structure and Properties of the VK6M Hard Alloy
Using the technology of vacuum compression sintering, which makes it possible to obtain hard alloys with a high level of mechanical and operational properties, the influence of gas pressure growth rates of 0.08, 0.2, and 0.5 MPa/min to 5 MPa during vacuum compression sintering on the structure and properties of the VK6M fine grained hard alloy is investigated. A positive effect of increasing the rate of gas pressure growth on the ultimate flexural strength and operational stability due to obtaining a structure with finer graines (dWC = 1.24 μm), reducing the residual microporosity to A1 0.02, increasing the shape factor of carbide grains to 0.84, and decreasing the intensity of gas desorption by a factor of 2.5–7.0 is established. The ultimate flexural strength of the alloy sintered at a gas pressure growth rate of 0.5 MPa/min is 1.35 times higher compared to that of the alloy sintered at a gas pressure growth rate of 0.08 MPa/min and 1.5 times higher compared to that of the alloy sintered in a vacuum, while the relative operational stability against rough milling in the first case is higher by 1.35 and 1.8 times compared to those in the corresponding other two cases, respectively.
期刊介绍：
Journal of Superhard Materials presents up-to-date results of basic and applied research on production, properties, and applications of superhard materials and related tools. It publishes the results of fundamental research on physicochemical processes of forming and growth of single-crystal, polycrystalline, and dispersed materials, diamond and diamond-like films; developments of methods for spontaneous and controlled synthesis of superhard materials and methods for static, explosive and epitaxial synthesis. The focus of the journal is large single crystals of synthetic diamonds; elite grinding powders and micron powders of synthetic diamonds and cubic boron nitride; polycrystalline and composite superhard materials based on diamond and cubic boron nitride; diamond and carbide tools for highly efficient metal-working, boring, stone-working, coal mining and geological exploration; articles of ceramic; polishing pastes for high-precision optics; precision lathes for diamond turning; technologies of precise machining of metals, glass, and ceramics. The journal covers all fundamental and technological aspects of synthesis, characterization, properties, devices and applications of these materials. The journal welcomes manuscripts from all countries in the English language.
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