选区激光熔化工艺参数对钴铬合金材料成型件致密度与表面粗糙度的影响规律研究
|
摘要
采用选区激光熔化(SLM)技术成型钴铬合金,运用正交实验法研究了激光功率P、扫描速度v、铺粉厚度h和扫描间距d对多层成型件致密度、上表面粗糙度和侧面粗糙度的影响规律。实验结果表明,铺粉厚度是影响SLM成型件致密度大小的最重要因素,而激光功率是影响成型件上表面和侧面粗糙度的最重要因素。获取了优化的工艺参数为P=170 W,v=500mm/s,h=0.03mm,d=0.08mm,该工艺参数下成型件的致密度最高达97.05%,上表面粗糙度Ra最低为20.3μm,侧面粗糙度Ra为15.5μm。致密度和表面粗糙度之间存在相互影响关系,表面粗糙度的累积效应会导致成型件致密度降低。
Selective laser melting was used to form Co-Cr alloy.The orthogonal experiment was used to study the influence laws of laser power P,scanning speed v,powder layer thickness hand scanning distance don the density,surface roughness and side roughness were analyzed.The experimental results showed that the powder layer thickness was the most important factor affecting the density of the molded parts,and the laser power was the most important factor affecting the roughness of the top surface and side of the molded part.The optimized process parameters were P=170 W,v=500 mm/s,h=0.03 mm,d=0.08 mm.The highest density of the molded part was up to 97.05%,the lowest top surface roughness was 20.3μm,the side surface roughness was 15.5μm.There is an interaction relationship between density and surface roughness,and the cumulative effect of surface roughness can lead to a decrease in the density of the molded part.
Selective laser melting was used to form Co-Cr alloy.The orthogonal experiment was used to study the influence laws of laser power P,scanning speed v,powder layer thickness hand scanning distance don the density,surface roughness and side roughness were analyzed.The experimental results showed that the powder layer thickness was the most important factor affecting the density of the molded parts,and the laser power was the most important factor affecting the roughness of the top surface and side of the molded part.The optimized process parameters were P=170 W,v=500 mm/s,h=0.03 mm,d=0.08 mm.The highest density of the molded part was up to 97.05%,the lowest top surface roughness was 20.3μm,the side surface roughness was 15.5μm.There is an interaction relationship between density and surface roughness,and the cumulative effect of surface roughness can lead to a decrease in the density of the molded part.
引文
[1]OVER C,MEINERS W,WISSNBACH K,et al.Selective laser melting:a new approach for the direct manufacturing of metal parts and tools[R].Frankfurt:1st International Conference on laser assisted Net Shape Engineering,2001.
[2]KRUTH J P,MERCELIS P,VAERENBERGH J V,et al.Binding mechanisms in selective laser sintering and melting[J].Rapid Prototyping Journal,2005,11(1):26-36.
[3]YUE BING,VARADARAJAN K M,AI SONGTAO,et al.Differences of knee anthropometry between chinese and white men and women[J].The Journal of Arthroplasty,2011,26(1):124-130.
[4]MOHAMED M,EMMA E A F,LYNDSAY S B,et al.Three-dimensional morphology of the knee reveals ethnic differences[J].Clinical Orthopaedics and Related Research,2012,470(1):172-185.
[5]XIANG NAN,XIN XIANZHEN,CHEN JIE,et al.Metal-ceramic bond strength of Co-Cr alloy fabricated by selective laser melting[J].Journal of Dentistry,2012(40):453-457.
[6]ZHANG BIAO,HUANG QIRONG,GAO YANG,et al.Preliminary study on some properties of Co-Cr dental alloy formed by selective laser melting technique[J].Journal of Wuhan University of Technology-Mater,2012,27(4):665-668.
[7]OH K T,KANG D K,CHOI G S.Cytocompatibility and electrochemical properties of Ti-Au alloys for biomedical applications[J].Journal of Biomedical Materials Research Part B:Applied Biomaterials,2007,83B(2):320-326.
[8]YU ZHENTAO,ZHENG YUFENG,ZHOU LIANG,et al.Shape memory effect and superelastic property of a novel Ti-3Zr-2Sn-3Mo-15Nb alloy[J].Rare Metal Materials and Engineering,2008(37):1-5.
[9]刘睿诚,杨永强,王迪.选区激光熔化成型金属零件上表面粗糙度的研究[J].激光技术,2013,37(4):425-430.LIU RUICHENG,YANG YONGQIANG,WANG DI.Study on the upper surface roughness of laser fusion molding metal parts in selective area[J].Laser Technic,2013,37(04):425-430.
[10]赵进炎,仇毅,刘富荣,等.SLM成型医用钴铬合金的表面粗糙度与致密度研究[J].应用激光,2014,34(6):524-527.
[11]PUPO Y,DELGADO J,SERENO L,et al.Scanning space analysis in selective laser melting for CoCrMo powder[J].Procedia Engineer,2013(63):370-378.
[12]MONROY K,DELGADO J,CIURANA J.Study of the pore formation on CoCrMo alloys by selective laser melting manufacturing process[J].Procedia Engineering,2013(63):361-369.
[13]VANDENBROUCKE B,KRUTH J.Selective laser melting of biocompatible metals for rapid manufacturing of medical parts[J].Rapid Prototyping Journal,2013,13(4):196-203.
[14]赵进炎.选区激光熔化钴铬合金工艺与性能研究[D].北京:北京工业大学,2015.
[2]KRUTH J P,MERCELIS P,VAERENBERGH J V,et al.Binding mechanisms in selective laser sintering and melting[J].Rapid Prototyping Journal,2005,11(1):26-36.
[3]YUE BING,VARADARAJAN K M,AI SONGTAO,et al.Differences of knee anthropometry between chinese and white men and women[J].The Journal of Arthroplasty,2011,26(1):124-130.
[4]MOHAMED M,EMMA E A F,LYNDSAY S B,et al.Three-dimensional morphology of the knee reveals ethnic differences[J].Clinical Orthopaedics and Related Research,2012,470(1):172-185.
[5]XIANG NAN,XIN XIANZHEN,CHEN JIE,et al.Metal-ceramic bond strength of Co-Cr alloy fabricated by selective laser melting[J].Journal of Dentistry,2012(40):453-457.
[6]ZHANG BIAO,HUANG QIRONG,GAO YANG,et al.Preliminary study on some properties of Co-Cr dental alloy formed by selective laser melting technique[J].Journal of Wuhan University of Technology-Mater,2012,27(4):665-668.
[7]OH K T,KANG D K,CHOI G S.Cytocompatibility and electrochemical properties of Ti-Au alloys for biomedical applications[J].Journal of Biomedical Materials Research Part B:Applied Biomaterials,2007,83B(2):320-326.
[8]YU ZHENTAO,ZHENG YUFENG,ZHOU LIANG,et al.Shape memory effect and superelastic property of a novel Ti-3Zr-2Sn-3Mo-15Nb alloy[J].Rare Metal Materials and Engineering,2008(37):1-5.
[9]刘睿诚,杨永强,王迪.选区激光熔化成型金属零件上表面粗糙度的研究[J].激光技术,2013,37(4):425-430.LIU RUICHENG,YANG YONGQIANG,WANG DI.Study on the upper surface roughness of laser fusion molding metal parts in selective area[J].Laser Technic,2013,37(04):425-430.
[10]赵进炎,仇毅,刘富荣,等.SLM成型医用钴铬合金的表面粗糙度与致密度研究[J].应用激光,2014,34(6):524-527.
[11]PUPO Y,DELGADO J,SERENO L,et al.Scanning space analysis in selective laser melting for CoCrMo powder[J].Procedia Engineer,2013(63):370-378.
[12]MONROY K,DELGADO J,CIURANA J.Study of the pore formation on CoCrMo alloys by selective laser melting manufacturing process[J].Procedia Engineering,2013(63):361-369.
[13]VANDENBROUCKE B,KRUTH J.Selective laser melting of biocompatible metals for rapid manufacturing of medical parts[J].Rapid Prototyping Journal,2013,13(4):196-203.
[14]赵进炎.选区激光熔化钴铬合金工艺与性能研究[D].北京:北京工业大学,2015.