La_2O_3对Mo-25Si-8.5B合金摩擦磨损性能的影响
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摘要
以Mo-25Si-8. 5B合金为基础配方,研究La_2O_3含量对其硬度、密度及摩擦磨损性能的影响。用激光共聚焦显微镜观察试样的摩擦磨损形貌,用JB-5C粗糙度轮廓仪测定试样的磨痕尺寸,用密度计和显微硬度计分别测定试样的密度和显微维氏硬度。研究表明,Mo-25Si-8. 5B合金随着La_2O_3含量的增加密度和硬度而减小,当氧化镧含量为0. 9%时,合金最大密度为8. 84 g/cm~3,最大硬度为1616. 7 HV,同时耐磨性最好。当La_2O_3含量超过0. 9%时密度和硬度降低,耐磨性也随之降低。
Based on Mo-25 Si-8.5 B alloy,the influence of La_2 O_3 content on its hardness,density and friction and wear characteristics were studied.The friction and wear morphology of the samples were observed by laser confocal microscope,the wear mark size of the samples was measured by J B-5 C roughness profiler,and the density and micro Vickers hardness of the samples were measured by densitometer and microhardness tester,respectively.The results show that the density and hardness of Mo-25 Si-8.5 B alloy decrease with the increase of La_2 O_3 content.When the La_2 O_3 content is 0.9%,the maximum density of the alloy is 8.84 g/cm~3,the maximum hardness is 1616.7 HV,and the wear resistance is the highest.When the La_2 O_3 content exceeds 0.9%,the density and hardness decrease,and the wear resistance also decreases.
Based on Mo-25 Si-8.5 B alloy,the influence of La_2 O_3 content on its hardness,density and friction and wear characteristics were studied.The friction and wear morphology of the samples were observed by laser confocal microscope,the wear mark size of the samples was measured by J B-5 C roughness profiler,and the density and micro Vickers hardness of the samples were measured by densitometer and microhardness tester,respectively.The results show that the density and hardness of Mo-25 Si-8.5 B alloy decrease with the increase of La_2 O_3 content.When the La_2 O_3 content is 0.9%,the maximum density of the alloy is 8.84 g/cm~3,the maximum hardness is 1616.7 HV,and the wear resistance is the highest.When the La_2 O_3 content exceeds 0.9%,the density and hardness decrease,and the wear resistance also decreases.
引文
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[5]Cockeram B V.The mechanical properties and fracture mechanisms of wrought low carbon arc cast(LCAC),molybdenum-0 5pct titanium-0 Ipct zirconium(TZM),and oxide dispersion strengthened(ODS)molybdenum flat products[J].Materials Science and Engineering A,2006,418:120-136.
[6]Wang Yi,Wang Dezhi,Liu Huayan,et al.Preparation and characterization of sintered molybdenum doped with Mo Si2/La2O3/Y2O3composite particle[J].Materials Science and Engineering A,2012,558:497-501.
[7]Mueller A J,Bianco R,Buckman R W.Evaluation of oxide dispersion strengthened(ODS)molybdenum and molybdenum-rhenium alloys[J].International Journal of Refractory Metals and Hard Materials,2000,18(4/5):205-211.
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[9]付小俊.稀土氧化物纳米掺杂对钼合金力学性能研究的影响[J].中国钨业,2016,31(3):63-67.Fu Xiaojun.Effect of doped rare earth oxides on the mechanical properties of molybdenum alloy wire[J].China Tungsten Industry,2016,31(3):63-67.
[10]傅丽华.热等静压Cr3C2/Ni3Al复合材料的组织及其磨损性能研究[D].北京:北京科技大学,2017.Fu Lihua.Study on microstructures and tribological properties of Cr3C2/Ni3Al composites produced by hot isostatic pressing[D].Beijing:University of science and Technology Beijing,2017.
[11]王东,江野,贾少威,等.稀土Y对Mg-15Al合金组织及摩擦磨损行为的影响[J].有色金属加工,2016,45(6):23-28.Wang Dong,Jiang Ye,Jia Shaowei,et al.Effect of rare earth Y on microstructure and friction and wear properties of Mg-15Al alloy[J].Nonferrous Metals Processing,2016,45(6):23-28.
[12]王新鹏,易戈文,贾均红,等.Ni Al-TiO2/Bi2O3纳米复合涂层制备及宽温域摩擦磨损性能[J].摩擦学学报,2018,38(5):570-576.Wang Xinpeng,Yi Gewen,Jia Junhong,et al.Preparation and tribological properties of Ni Al-TiO2/Bi2O3nanocomposite coatings in wide temperature range[J].Tribology,2018,38(5):570-576.