一种镍基单晶高温合金表面性能优化的超声滚压表面强化方法

• Format: Patent
• Language: Chinese
• Published: 14.07.2023
• Subjects: AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR; CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMISTRY; CRYSTAL GROWTH; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; REFINING BY ZONE-MELTING OF MATERIAL; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE; SINGLE-CRYSTAL-GROWTH; TREATMENT OF ALLOYS OR NON-FERROUS METALS; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL

本发明提供一种镍基单晶高温合金表面性能优化的超声滚压表面强化方法，涉及合金板材的变形加工技术领域。本发明采用表面超声滚压技术，进一步通过控制超声波振动加工头的下压力、超声波频率、振幅，机床的走刀路线、走刀速度以及冷却方法等参数制备得到表面性能优异的镍基单晶高温合金板材。在超声波冲击载荷与平面剪切力的共同作用下，在镍基单晶高温合金板材表面有效引入残余压应力并沿表层至基体组织逐渐降低，并显著提高表层显微硬度值，沿表层至基体组织逐渐降低，同时，表面超声滚压加工使得板材原始切削表面的表面粗糙度值显著降低，有效提高材料表面质量。材料表面质量的多方面提高且未在表面形成晶粒细化，使得材料抗疲劳性能显著提高。 The invention provides an ultrasonic rolling surface strengthening method for optimizing the surface performance of a nickel-based single-crystal high-temperature alloy, and relates to the technical field of deformation processing of alloy plates. A surface ultrasonic rolling technology is adopted, and the nickel-based single-crystal high-temperature alloy plate with excellent surface performance is prepared by further controlling parameters such as downward pressure, ultrasonic frequency and amplitude of an ultrasonic vibration machining head, a feeding path and a feeding speed of a machine tool, a cooling method and the like. Under the combined action of ultrasonic impact load and plane shear force, residual com