雷一腾,宋成杰,薛武军,洪远,孙聪.激光渗碳磨削Ti6Al4V表面抗疲劳制造机理研究[J].表面技术,2025,54(10):199-207, 265.
LEI Yiteng,SONG Chengjie,XUE Wujun,HONG Yuan,SUN Cong.Ti6Al4V Surface Anti-fatigue Manufacturing Mechanism by Laser Carburizing Grinding[J].Surface Technology,2025,54(10):199-207, 265 |
| 激光渗碳磨削Ti6Al4V表面抗疲劳制造机理研究 |
| Ti6Al4V Surface Anti-fatigue Manufacturing Mechanism by Laser Carburizing Grinding |
| 投稿时间：2024-10-18 修订日期：2024-12-31 |
| DOI：10.16490/j.cnki.issn.1001-3660.2025.10.016 |
| 中文关键词: Ti6Al4V 激光渗碳磨削 性-形协同控制 加工-强化一体化 |
| 英文关键词:Ti6Al4V laser carburizing grinding property-shape synergistic manufacturing machining-strengthening integration |
| 基金项目:教育部产学合作协同育人项目(202102152041);国家自然科学基金资助项目(52175383) |
| 作者 | 单位 |
| 雷一腾 | 伊犁师范大学，新疆 伊宁 835000 |
| 宋成杰 | 东北大学，沈阳 110819 |
| 薛武军 | 东北大学，沈阳 110819 |
| 洪远 | 东北大学，沈阳 110819 |
| 孙聪 | 东北大学，沈阳 110819 |
|
| Author | Institution |
| LEI Yiteng | Yili Normal University, Xinjiang Yining 835000, China |
| SONG Chengjie | Northeastern University, Shenyang 110819, China |
| XUE Wujun | Northeastern University, Shenyang 110819, China |
| HONG Yuan | Northeastern University, Shenyang 110819, China |
| SUN Cong | Northeastern University, Shenyang 110819, China |
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| 中文摘要: |
| 目的 现有的Ti6Al4V表面制造与表面强化工艺相分离的生产模式，会导致工艺复杂、生产周期长、生产效率低。因此，有必要进一步完善高性能钛合金表面性形协同制造方法以满足产业升级需求。方法 提出一种Ti6Al4V表面加工-强化一体化方法，即激光渗碳磨削。利用可分离式的石墨层和微量润滑系统，将激光渗碳合金化过程耦合到表面磨削加工中，实现加工表面性能-精度协同控制。通过实验研究，对比了一体化加工方法(激光渗碳磨削)与传统的分离式方法(先进行激光合金化，再进行磨削加工)在加工表面微观相组成、表面形貌和表面力学性能方面的差异。分析了激光渗碳和磨削回火作用下Ti6Al4V重熔层的形成机理。结果 激光合金化与磨削回火作用使重熔层内形成弥散分布的颗粒状TiC相，改善了材料表面的力学性能与可磨性。激光软化作用使多磨粒去除过程更加稳定。激光渗碳磨削可以在Ti6Al4V表面形成500 μm厚的重熔层，其硬度高达652HV，表面抗磨损能力大幅度提升。与分离式方法相比，激光渗碳磨削后表面形状精度提升20%。结论 研究是Ti6Al4V表面加工-强化一体化的创新性尝试，相关技术对指导生产实践具有重要意义。同时，研究结果完善了钛合金表面性能-精度协同控制理论，为高性能Ti6Al4V表面高效制造提供了技术支持。 |
| 英文摘要: |
| Ti6Al4V has been one of the most utilized titanium alloys in modern manufacturing due to its better mechanical properties. High-precision Ti6Al4V surfaces with superior properties are in urgent demand in the manufacturing industry. The existing production model that separates surface manufacturing and surface strengthening processes can lead to long production cycles, low production efficiency and severe resource consumption. Regarding the actual manufacturing process, surface precision removal and surface strengthening are two single surface processing technologies. The series procedure may bring about complicated processes, a long manufacturing period, and even more extra pollution emissions. Therefore, an integrated Ti6Al4V surface machining and strengthening method, laser carburizing grinding, is proposed. The related experiment is set up on a self-designed laser carburizing grinding system, which consists of an automatic grinder, a continuous laser shooting system, a minimal lubricant system, a force measurement system and a transient temperature measurement system. The separable graphite layer is applied on the Ti6Al4V (20 mm×60 mm), which is feasible for the pre-grinding before the experiment and can decrease the fixture frequency. By a separable graphite layer and a micro-lubrication system, the laser carburizing alloying process is coupled to the surface grinding process to achieve synergistic control of the machined surface properties and accuracy. In order to avoid the interference of the rotating grinding wheel, the continuous laser shoots on the upper side of the workpiece, leaving a 5 mm circular spot on the surface. Under the intense heat and shocking effect by continuous laser, the surface material rapidly melts and forms the surface remelt layer. Moreover, the minimal lubricant system is applied to improve the surface cooling velocity of the workpiece surface, which is helpful to increase the microstructure density and decrease the surface burn. The differences in surface micro-phase composition, surface morphology and mechanical properties between integrated processing (laser carburizing grinding) and separated processing (laser alloying & grinding) are compared experimentally. To be specific, the relative surface characteristic experiment is also conducted, and the recorded dynamic mechanical-thermal signal, the XRD, the metallographic phase, the SEM, the EDS, the microhardness and the wear resistance of the machining surface are compared and studied under the laser carburizing grinding and laser alloying & grinding respectively. The laser alloying and grinding tempering effects lead to diffusely distributed granular TiC phases within the remelt layer, improving the mechanical properties and grindability of the material surface. Meanwhile, the laser softening makes the multi-abrasive grain removal process more stable. After laser carburizing grinding, the thickness of the surface remelt layer is about 500 μm, the surface hardness reaches 652HV, and the surface wear resistance is greatly improved. Compared with the separated method, the surface shape accuracy increases by 20%. Grooves and bumps on the machined surfaces are reduced, and ample block shedding disappears. This study is an innovative attempt at Ti6Al4V surface machining-strengthening integration, and the related technology is of great practical significance in guiding production. Meanwhile, the results improve the titanium alloy surface property-accuracy synergistic control theory, which provides technical support for efficiently manufacturing high-performance Ti6Al4V surfaces. |
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