航空制造技术
航空製造技術
항공제조기술
AERONAUTICAL MANUFACTURING TECHNOLOGY
2014年
6期
89-92
,共4页
焦健%王宇%邱海鹏%陈明伟%李秀倩%高淑雅%张文武
焦健%王宇%邱海鵬%陳明偉%李秀倩%高淑雅%張文武
초건%왕우%구해붕%진명위%리수천%고숙아%장문무
机械加工%水射流加工%激光加工%表面形貌
機械加工%水射流加工%激光加工%錶麵形貌
궤계가공%수사류가공%격광가공%표면형모
Machining process%Water jet machin-ing process%Laser processing%Surface morphology
主要对比分析了机械加工、高压水射流加工、激光加工的3种不同加工工艺对SiCf/SiC复合材料表面形貌的影响。结果显示机械加工与高压水射流加工表面孔洞和微裂纹均较多,水切割表面呈现出纤维拔出状态;空气环境中激光加工的表面平整,出现了封孔特征,孔洞和微裂纹数量少,氮气环境中激光加工的表面形貌生长了一层SiC晶粒,可起到愈合表面孔洞和微裂纹的作用。
主要對比分析瞭機械加工、高壓水射流加工、激光加工的3種不同加工工藝對SiCf/SiC複閤材料錶麵形貌的影響。結果顯示機械加工與高壓水射流加工錶麵孔洞和微裂紋均較多,水切割錶麵呈現齣纖維拔齣狀態;空氣環境中激光加工的錶麵平整,齣現瞭封孔特徵,孔洞和微裂紋數量少,氮氣環境中激光加工的錶麵形貌生長瞭一層SiC晶粒,可起到愈閤錶麵孔洞和微裂紋的作用。
주요대비분석료궤계가공、고압수사류가공、격광가공적3충불동가공공예대SiCf/SiC복합재료표면형모적영향。결과현시궤계가공여고압수사류가공표면공동화미렬문균교다,수절할표면정현출섬유발출상태;공기배경중격광가공적표면평정,출현료봉공특정,공동화미렬문수량소,담기배경중격광가공적표면형모생장료일층SiC정립,가기도유합표면공동화미렬문적작용。
Machining process, high-pressure water-jet machining process,laser processing are used on SiCf/SiC composites to obtain the machined surface,the ef-fect of processing on the surface morphology is analyzed . The result shows that the inherent pores are exposed on the machined surfaces by water-jet machining process and machining process and the initial micro-cracks grow on the surfaces. A smooth surface coated by SiOx with a few of micro-cracks is obtained after laser processing in air environment with the vanishing of part of the in-herent pores, which proves that a sealing effect on SiCf/SiC composites treated by laser processing. A similar ef-fect is observed on the surface of sample cutted by laser processing under inert gas. SiC grain deposites on the surface of composites to form a SiC layer, which plays a role in sealing the inherent pores.