CAJ | 학술논문

目的：研究高速干切削工艺对难加工材料加工表面质量的影响规律。方法在切削速度范围157~314 m/ min 内，依据析因试验设计方法，对马氏体不锈钢工件进行干切削条件下的端面铣削工艺试验，考查铣削加工表面粗糙度变化规律、表面微结构组织特征与维氏硬度分布曲线。结果由每齿进给量和铣削深度共同决定的切屑截面构形对马氏体不锈钢加工表面轮廓的形成机制有显著作用，加工表面的表层及次表层组织主要由塑性变形层与回火多相组织层共同构成。结论为减小干式切削对加工表面层组织特征的影响，应优先选择大进给量、小切深的工艺参数组合。
목적：연구고속간절삭공예대난가공재료가공표면질량적영향규률。방법재절삭속도범위157~314 m/ min 내，의거석인시험설계방법，대마씨체불수강공건진행간절삭조건하적단면선삭공예시험，고사선삭가공표면조조도변화규률、표면미결구조직특정여유씨경도분포곡선。결과유매치진급량화선삭심도공동결정적절설절면구형대마씨체불수강가공표면륜곽적형성궤제유현저작용，가공표면적표층급차표층조직주요유소성변형층여회화다상조직층공동구성。결론위감소간식절삭대가공표면층조직특정적영향，응우선선택대진급량、소절심적공예삼수조합。
Objective To investigate the influences of high-speed dry cutting process on the surface quality of difficult-to-cut materials. Methods Face milling experiment of martensite stainless steel was conducted at the cutting regime of 157 ~ 314 m/ min in dry cutting condition under the guidance of 2K factorial design method, the characteristics of surface roughness, microstructure properties and micro-hardness distribution curves were studied experimentally. Results It was shown that: the chip cross section determined by the depth of cut and feed per tooth had significant influence on the formation of roughness profiles; severe plastic de-formation and multi-phases structures were the main components of the surface and subsurface layers. Conclusion In order to re-duce the negative effects of dry cutting process on machined surfaces, the cutting parameters should be carefully controlled, larger feed per tooth and smaller depth of cut are preferred.