Effect of Cooling Conditions on the Cutting Performance in High-Speed Turning of Hardened D6AC High-strength Steel Using PCBN Tools

Effect of Cooling Conditions on the Cutting Performance in High-Speed Turning of Hardened D6AC High-strength Steel Using PCBN Tools | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Effect of Cooling Conditions on the Cutting Performance in High-Speed Turning of Hardened D6AC High-strength Steel Using PCBN Tools Yi Han Liu, Xiaoliang Yang, Jinglong Gao, Shutao Huang, Zhonghan Cui, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7519086/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 4 You are reading this latest preprint version Abstract High-speed precision cutting of hardened high-strength steel is a pivotal strategy for streamlining process chains, enhancing cutting efficiency, and reducing manufacturing costs. To examine the influence of cooling conditions, high-speed turning experiments were conducted on hardened D6AC high-strength steel with polycrystalline cubic boron nitride (PCBN) tools under both dry and wet cutting environments. A comparative analysis was carried out on tool wear, cutting temperature, cutting forces, chip morphology, and surface roughness. Dry cutting resulted in better tool wear resistance, as evidenced by a 25% increase in tool life to reach the flank wear limit ( VB max = 300 µm) compared to wet cutting. The predominant wear mechanisms were characterized by crater formation on the rake face and grooving on the flank face under both dry and wet cutting, in addition to which the tool produced tiny edge chipping under wet cutting. The workpiece temperature was significantly lower than the chip temperature in dry cutting. The influence of cooling conditions on the cutting forces was minor; the force components were initially in the order F z > F y > F x , which later changed to F y > F z > F x as cutting proceeded. Chips produced under wet cutting conditions were consistently serrated; although dry cutting initially produced similar serrated chips, the serration morphologies became less pronounced as the cut progressed. Wet cutting produced lower values of surface roughness. PCBN tool Hardened D6AC high-strength steel High-Speed turning Cooling condition Full Text Cite Share Download PDF Status: Under Review Version 1 posted Reviewers agreed at journal 10 Nov, 2025 Reviewers invited by journal 05 Sep, 2025 Editor assigned by journal 05 Sep, 2025 First submitted to journal 03 Sep, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-7519086","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":510672565,"identity":"7cee4afb-4a46-4405-adbc-e38639b10e7a","order_by":0,"name":"Yi Han 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To examine the influence of cooling conditions, high-speed turning experiments were conducted on hardened D6AC high-strength steel with polycrystalline cubic boron nitride (PCBN) tools under both dry and wet cutting environments. A comparative analysis was carried out on tool wear, cutting temperature, cutting forces, chip morphology, and surface roughness. Dry cutting resulted in better tool wear resistance, as evidenced by a 25% increase in tool life to reach the flank wear limit (\u003cem\u003eVB\u003c/em\u003e\u003csub\u003emax\u003c/sub\u003e = 300 \u0026micro;m) compared to wet cutting. The predominant wear mechanisms were characterized by crater formation on the rake face and grooving on the flank face under both dry and wet cutting, in addition to which the tool produced tiny edge chipping under wet cutting. The workpiece temperature was significantly lower than the chip temperature in dry cutting. The influence of cooling conditions on the cutting forces was minor; the force components were initially in the order \u003cem\u003eF\u003c/em\u003e\u003csub\u003e\u003cem\u003ez\u003c/em\u003e\u003c/sub\u003e \u0026gt;\u003cem\u003eF\u003c/em\u003e\u003csub\u003e\u003cem\u003ey\u003c/em\u003e\u003c/sub\u003e \u0026gt;\u003cem\u003eF\u003c/em\u003e\u003csub\u003e\u003cem\u003ex\u003c/em\u003e\u003c/sub\u003e, which later changed to \u003cem\u003eF\u003c/em\u003e\u003csub\u003e\u003cem\u003ey\u003c/em\u003e\u003c/sub\u003e \u0026gt;\u003cem\u003eF\u003c/em\u003e\u003csub\u003e\u003cem\u003ez\u003c/em\u003e\u003c/sub\u003e \u0026gt;\u003cem\u003eF\u003c/em\u003e\u003csub\u003e\u003cem\u003ex\u003c/em\u003e\u003c/sub\u003e as cutting proceeded. Chips produced under wet cutting conditions were consistently serrated; although dry cutting initially produced similar serrated chips, the serration morphologies became less pronounced as the cut progressed. 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