微喷砂时间对陶瓷刀具表面完整性影响研究

针对陶瓷刀具高速切削高温合金时刀具磨损严重的问题,采用微喷砂处理技术对Sialon基陶瓷刀具表面进行处理,研究喷砂时间对Sialon基陶瓷刀具表面完整性(微观形貌、表面粗糙度、维氏硬度、断裂韧度、残余压应力)的影响规律,提升陶瓷刀具表面完整性,从而提高刀具耐磨性。研究表明:在喷砂4 min、喷砂压强0.4 MPa的条件下,陶瓷表面微观缺陷得到改善,断裂韧度提升32%,残余压应力提升12%,可以获得综合水平较高的表面完整性,为陶瓷刀具微喷砂处理参数的选择提供理论性指导,有助于提升陶瓷刀具表面完整性。

Influence of Micro-blasting Time on Surface Integrity of A Ceramic Tool

In view of the serious problem of tool wear in high-speed cutting of high-temperature alloys with ceramic tools,micro-blasting technology was used to treat the surface of Sialon-based ceramic tools.The effect of blasting time on the surface integrity(morphology,surface roughness,Vickers hardness,fracture toughness,residual compressive stress)of Sialon-based ceramic tools was studied.The surface integrity and wear resistance of the ceramic tool can be improved.The results showed that the surface integrity can be obtained under the conditions of blasting for 4 min and blasting pressure of 0.4 MPa.The micro-defects on the ceramic surface were improved,and.The fracture toughness was increased by 32%.The residual compressive stress was increased by 12%.This study can provide theoretical guidance for the selection of micro-blasting treatment parameters of ceramic tools and help to improve the surface integrity of ceramic tools.