现代制造工程Issue(4)：78-83,6.DOI:10.16731/j.cnki.1671-3133.2026.04.010
GH4169高温合金表面NiCrAlY涂层的单晶刚玉砂轮磨削工艺优化与精度控制
Process optimization and precision control of single-crystal alumina wheel grinding for NiCrAlY coating on GH4169 superalloy surface
摘要
Abstract
To address critical challenges in synchronous grinding of GH4169 superalloy substrates with NiCrAlY thermal barrier coatings—including excessive dimensional deviation,grinding cracks,and coating delamination—a precision grinding process using Single-Crystal Alumina(SCA)wheels was developed.Comparative analysis revealed that SCA wheels can significantly sup-press edge chipping compared to white alumina wheels.Through a three-factor,three-level orthogonal experiment,the significance order of key process parameters affecting dimensional accuracy Δ and surface roughness Ra was determined as wheel feed speed＞wheel rotational speed＞grinding depth and wheel rotational speed＞wheel feed speed＞grinding depth.The optimized process parameter combination was wheel feed speed of 8 mm/min,wheel rotational speed of 2 500 r/min,grinding depth of 3 μm.Post-optimization results demonstrate 42.9％improvement in dimensional accuracy(Δ=1.2 μm),46.3％reduction in surface rough-ness(Ra=0.2 μm),elimination of grinding cracks and coating delamination(validated by microscopic inspection).Batch pro-duction verification confirmed that metallurgical structure was compliance with HB 6702 standard,product qualification rate was increased to 99.2％,providing a high-reliability grinding solution for aero-engine high-temperature component remanufacturing.关键词
高温合金/NiCrAlY涂层/单晶刚玉砂轮/正交优化/表面完整性/精密磨削Key words
superalloy/NiCrAlY coating/Single-Crystal Alumina(SCA)wheel/orthogonal optimization/surface integrity/precision grinding分类
矿业与冶金引用本文复制引用
汤涛,王熔,彭思泽..GH4169高温合金表面NiCrAlY涂层的单晶刚玉砂轮磨削工艺优化与精度控制[J].现代制造工程,2026,(4):78-83,6.基金项目
湖南省科技创新计划项目(2023RC3246) （2023RC3246）
