预置粉末成分对激光熔覆Ti合金复合涂层组织与性能的影响
|
摘要
采用YAG光纤激光器进行熔覆试验,在Ti-6A1-4V合金表面预置了Ti和不同预置粉末含量的试样,制备出原位自生的Ti B金属陶瓷复合涂层。主要研究了添加不同预置粉末含量对Ti B增强Ti基合金复合涂层的组织及其性能的影响。采用光学显微镜、X射线衍射仪,显微硬度计等设备及分析手段,对Ti-6Al-4V合金表面改性层的原位自生反应机制进行了研究。结果说明:涂层主要是由α-Ti和TiB物相组成,以枝晶状、胞状和颗粒状组织均匀分布于其中。在结合区,大多以细小的针状增强相为主。随着预置粉末中硼含量的增加,熔覆层与基材之间的冶金结合越来越好,熔覆层组织细化,涂层的硬度值上升。熔覆层显微硬度为基材硬度值的1. 5～2倍,硬度值大约在550 HV0. 2到800 HV0. 2。
The Ti-6A1-4V specimens clad with different preset powder content were prepared using YAG fiber laser,and the in-situ Ti B cermet-ceramic composite coating was investigated. The effects of different pre-powder contents on microstructure and properties of Ti B reinforced titanium matrix alloy composite coatings were studied. The in-situ reaction mechanism of coating on the surface of Ti-6Al-4V alloy and its effect on hardness property were revealed,which is characterized by scanning electron microscope,X-ray diffraction meter,schematic of hardness test machine and other equipment. The results showed that the coating is mainly composed of α-Ti and Ti B phase,which are distributed in dendrite,cellular and granular tissues. In the binding area,most of them were small needle-like enhanced phase. With the increased of the boron content,the metallurgical bonding between the cladd layer and the substrate is getting better and the cladd layer is refined and the hardness value of the coating is increased. The microhardness of the clad layer is 1.5-2 times the hardness value of the substrate,and the hardness value range from 550 HV0.2 to 800 HV0.2.
The Ti-6A1-4V specimens clad with different preset powder content were prepared using YAG fiber laser,and the in-situ Ti B cermet-ceramic composite coating was investigated. The effects of different pre-powder contents on microstructure and properties of Ti B reinforced titanium matrix alloy composite coatings were studied. The in-situ reaction mechanism of coating on the surface of Ti-6Al-4V alloy and its effect on hardness property were revealed,which is characterized by scanning electron microscope,X-ray diffraction meter,schematic of hardness test machine and other equipment. The results showed that the coating is mainly composed of α-Ti and Ti B phase,which are distributed in dendrite,cellular and granular tissues. In the binding area,most of them were small needle-like enhanced phase. With the increased of the boron content,the metallurgical bonding between the cladd layer and the substrate is getting better and the cladd layer is refined and the hardness value of the coating is increased. The microhardness of the clad layer is 1.5-2 times the hardness value of the substrate,and the hardness value range from 550 HV0.2 to 800 HV0.2.
引文
[1]Adebiyi D I,Popoola A P I.Mitigation of abrasive wear damage of a Ti-6Al-4V by Laser surface alloying[J].Materials and Design,2015,74:67-75.
[2]Huang Fengxiao,Jiang Zhonghao,Liu Ximing,et al.Microstructure and properties of thin wall by laser cladding forming[J].Journal of Materials Processing Technology,2009,209(11):4970-4976.
[3]宗琳,李荣广,张小玲.激光熔覆Fe-Ti-V-C合金微观组织与摩擦性能[J].机械工业学报,2017,53(2):67-73.Zong Lin,Li Rongguang,Zhang Xiaoling.Microstructure and wear resistance of Fe-Ti-V-C hardfacing alloys by laser cladding[J].Journal of Mechanical Engineering,2017,53(2):67-73.
[4]王锐,王存山.Nb4Si含量对激光熔覆Ti-Fe合金涂层组织和性能的影响[J].中国激光,2013,40(1):1-7.Wang Rui,Wang Cunshan.Influence of Nb4Si content on microstructure and property of Ti-Fe alloy coating prepared by laser cladding[J].Chinese Journal of Lasers,2013,40(1):1-7.
[5]张文光,王成焘,刘维民.钛合金表面改性层的摩擦学性能[J].摩擦学学报,2003,23(2):91-94.Zhang Wenguang,Wang Chentao,Liu Weimin,Tribological behavior of surface-modified layers on Ti alloy[J].Tribology,2003,23(2):91-94.
[6]Das D K,Trivedi S P.Microstructure of diffusion aluminide coating on Ti base alloy IMI 834 and their cyclic oxidation behaviour at 650℃[J].Materials Science and Engineering A,2004,367(1/2):225-233.
[7]Osterle W,Klaffke D,Griepentrog M.Potential of wear resistant coatings on Ti-6Al-4V for artificial hip joint bearing surfaces[J].Wear,2008,264(7/8):505-517.
[8]Peng X M,Xia C Q,Ma K,et al.Interaction of TC4 titanium alloy with Ni CrAlY coating after vacuum heat treatment[J].Materials Chemistry and Physics,2008,107(1):158-163.
[9]Ceschini L,Lanzoni E,Martini C,et al.Comparison of dry sliding friction and wear of Ti6 Al4 V alloy treated by plasma electrolytic oxidation and PVD coating[J].Wear,2008,264(1/2):86-95.
[10]翟永杰,刘秀波,乔世杰,等.热处理对TA2合金表面激光熔覆Ti2SC/Ti S涂层组织和力学性能的影响[J].表面技术,2017,46(6):207-214.Zhai Yongjie,Liu Xiubo,Qiao Shijie,et al.Influence of heat treatment on microstructure and mechanical properties of laser cladding Ti2SC/Ti S coating on TA2 alloy[J].Surface Technology,2017,46(6):207-214.
[11]石皋莲,吴少华,陆小龙,等.TA2钛合金表面激光熔覆Ti2SC/Ti S自润滑耐磨复合涂层组织与性能[J].材料热处理学报,2016,37(7):198-202.Shi Gaolian,Wu Shaohua,Lu Xiaolong,et al.Microstructure and property of laser clad Ti2SC/Ti S self-lubricating anti-wear composite coating on TA2 titanium alloy[J]Transactions of Materials and Heat Treatment,2016,37(7):198-202.
[12]罗新民,苑春智,任旭东,等.激光冲击超高应变率对钛板形变微结构的影响[J].材料热处理学报,2010,31(6):116-121.Luo Xinmin,Yuan Chunzhi,Ren Xudong,et al.Effect of super-highstrain rate on microstructure of titanium alloy sheet deformed by laser shocking[J].Transactions of Materials and Heat Treatment,2010,31(6):116-121.
[2]Huang Fengxiao,Jiang Zhonghao,Liu Ximing,et al.Microstructure and properties of thin wall by laser cladding forming[J].Journal of Materials Processing Technology,2009,209(11):4970-4976.
[3]宗琳,李荣广,张小玲.激光熔覆Fe-Ti-V-C合金微观组织与摩擦性能[J].机械工业学报,2017,53(2):67-73.Zong Lin,Li Rongguang,Zhang Xiaoling.Microstructure and wear resistance of Fe-Ti-V-C hardfacing alloys by laser cladding[J].Journal of Mechanical Engineering,2017,53(2):67-73.
[4]王锐,王存山.Nb4Si含量对激光熔覆Ti-Fe合金涂层组织和性能的影响[J].中国激光,2013,40(1):1-7.Wang Rui,Wang Cunshan.Influence of Nb4Si content on microstructure and property of Ti-Fe alloy coating prepared by laser cladding[J].Chinese Journal of Lasers,2013,40(1):1-7.
[5]张文光,王成焘,刘维民.钛合金表面改性层的摩擦学性能[J].摩擦学学报,2003,23(2):91-94.Zhang Wenguang,Wang Chentao,Liu Weimin,Tribological behavior of surface-modified layers on Ti alloy[J].Tribology,2003,23(2):91-94.
[6]Das D K,Trivedi S P.Microstructure of diffusion aluminide coating on Ti base alloy IMI 834 and their cyclic oxidation behaviour at 650℃[J].Materials Science and Engineering A,2004,367(1/2):225-233.
[7]Osterle W,Klaffke D,Griepentrog M.Potential of wear resistant coatings on Ti-6Al-4V for artificial hip joint bearing surfaces[J].Wear,2008,264(7/8):505-517.
[8]Peng X M,Xia C Q,Ma K,et al.Interaction of TC4 titanium alloy with Ni CrAlY coating after vacuum heat treatment[J].Materials Chemistry and Physics,2008,107(1):158-163.
[9]Ceschini L,Lanzoni E,Martini C,et al.Comparison of dry sliding friction and wear of Ti6 Al4 V alloy treated by plasma electrolytic oxidation and PVD coating[J].Wear,2008,264(1/2):86-95.
[10]翟永杰,刘秀波,乔世杰,等.热处理对TA2合金表面激光熔覆Ti2SC/Ti S涂层组织和力学性能的影响[J].表面技术,2017,46(6):207-214.Zhai Yongjie,Liu Xiubo,Qiao Shijie,et al.Influence of heat treatment on microstructure and mechanical properties of laser cladding Ti2SC/Ti S coating on TA2 alloy[J].Surface Technology,2017,46(6):207-214.
[11]石皋莲,吴少华,陆小龙,等.TA2钛合金表面激光熔覆Ti2SC/Ti S自润滑耐磨复合涂层组织与性能[J].材料热处理学报,2016,37(7):198-202.Shi Gaolian,Wu Shaohua,Lu Xiaolong,et al.Microstructure and property of laser clad Ti2SC/Ti S self-lubricating anti-wear composite coating on TA2 titanium alloy[J]Transactions of Materials and Heat Treatment,2016,37(7):198-202.
[12]罗新民,苑春智,任旭东,等.激光冲击超高应变率对钛板形变微结构的影响[J].材料热处理学报,2010,31(6):116-121.Luo Xinmin,Yuan Chunzhi,Ren Xudong,et al.Effect of super-highstrain rate on microstructure of titanium alloy sheet deformed by laser shocking[J].Transactions of Materials and Heat Treatment,2010,31(6):116-121.