Ce对铝青铜合金粉末及其熔覆层组织性能的影响
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摘要
本试验采用水雾化法制备新型铝青铜(Cu-14Al-X)合金粉末材料,材料的主要元素成分为Cu70～80％、Al12～16％、Fe2.0～4.0％,另外,其它的微量元素为Mn、Ni、Co、Ce等。并通过对水雾化法制备的铝青铜合金粉末颗粒的表面形貌、断面组织特征、显微硬度及其性能进行了研究与测试,探讨了元素Ce对铝青铜合金粉末表面形貌与性能的影响。结果表明,稀土元素Ce可以改善铝青铜合金粉末的表面形貌,提高合金粉末颗粒的球形度,并细化粉末晶粒,从而提高合金粉末颗粒的显微硬度、松装密度和流动性等性能。
将水雾化法制备的铝青铜合金粉末采用等离子喷焊技术,将其涂覆在45#钢基材表面上,通过光学显微镜、X射线衍射仪(XRD)、电子探针(EPMA).扫描电子显微(SEM)以及能谱仪(EDS)等对铝青铜合金粉末熔覆层的表面金相组织、相结构、界面组织和硬度进行了研究与测试,从而探讨了稀土元素Ce对铝青铜合金粉末熔覆层的组织与硬度的影响。结果表明,铝青铜合金粉末熔覆层组织主要由Cu9Al4、AlFe3、AlFe、Fe3Mn7等化合物组成,元素Ce对熔覆层的物相结构没有明显的影响,但它能够促进熔覆层黑色硬质相(k相)的生成,改善k相的形貌,使得k相分布更加均匀,细化熔覆层组织晶粒,并能净化晶界,减少其它合金元素的偏聚,提高熔覆层的结合强度和硬度。
The novel kind of aluminum bronze alloy (Cu-14A1-X) powders was produced by water-atomization technology in the present test. The main composition of aluminum bronze alloy powders is Cu70～80%,Al12～16%,Fe2.0～4.0%. Other alloying elements is Mn, Ni,Co,Ce etc. Surface morphology, microstructural characteristics, microhardness and properties of aluminum bronze alloy powder was studies and tested. The influence of Ce on microstructure and properties of the aluminum bronze powders was discussed. The results shown that rare earth element Ce can improve the surface morphology of aluminum bronze alloy powders, increase the particles sphericity, refines grain, improve the microhardness and bulk density and mobility.
Aluminum bronze alloy powder was coated on 45# steel by the plasma spray welding technology. Surface microstructure,phase structure,interface organization and hardness of aluminum bronze alloy powder coating was studied and tested by optical microscope, X-ray diffraction, electron probe micro-analysis (EPMA), scanning electronmicroscopy(SEM), energy dispersive spectrometer (EDS) and hardness. Effect of Ce on microstructure and hardness of the aluminum bronze coating was discussed. The results shown that aluminum bronze alloy powder coating were composed by Cu9Al4、AlFe3、AlFe、Fe3Mn7.
Element Ce does no affect the phase composition of aluminum bronze alloy powder coating. It promotes hard phase (K phase) formation in the coating, improves k-phase morphology, distributes K-phase, decreases the grain size of organization, purifies the grain boundary, reduces other elements accumulation, increases the bonding strength and hardness of coating.
将水雾化法制备的铝青铜合金粉末采用等离子喷焊技术,将其涂覆在45#钢基材表面上,通过光学显微镜、X射线衍射仪(XRD)、电子探针(EPMA).扫描电子显微(SEM)以及能谱仪(EDS)等对铝青铜合金粉末熔覆层的表面金相组织、相结构、界面组织和硬度进行了研究与测试,从而探讨了稀土元素Ce对铝青铜合金粉末熔覆层的组织与硬度的影响。结果表明,铝青铜合金粉末熔覆层组织主要由Cu9Al4、AlFe3、AlFe、Fe3Mn7等化合物组成,元素Ce对熔覆层的物相结构没有明显的影响,但它能够促进熔覆层黑色硬质相(k相)的生成,改善k相的形貌,使得k相分布更加均匀,细化熔覆层组织晶粒,并能净化晶界,减少其它合金元素的偏聚,提高熔覆层的结合强度和硬度。
The novel kind of aluminum bronze alloy (Cu-14A1-X) powders was produced by water-atomization technology in the present test. The main composition of aluminum bronze alloy powders is Cu70～80%,Al12～16%,Fe2.0～4.0%. Other alloying elements is Mn, Ni,Co,Ce etc. Surface morphology, microstructural characteristics, microhardness and properties of aluminum bronze alloy powder was studies and tested. The influence of Ce on microstructure and properties of the aluminum bronze powders was discussed. The results shown that rare earth element Ce can improve the surface morphology of aluminum bronze alloy powders, increase the particles sphericity, refines grain, improve the microhardness and bulk density and mobility.
Aluminum bronze alloy powder was coated on 45# steel by the plasma spray welding technology. Surface microstructure,phase structure,interface organization and hardness of aluminum bronze alloy powder coating was studied and tested by optical microscope, X-ray diffraction, electron probe micro-analysis (EPMA), scanning electronmicroscopy(SEM), energy dispersive spectrometer (EDS) and hardness. Effect of Ce on microstructure and hardness of the aluminum bronze coating was discussed. The results shown that aluminum bronze alloy powder coating were composed by Cu9Al4、AlFe3、AlFe、Fe3Mn7.
Element Ce does no affect the phase composition of aluminum bronze alloy powder coating. It promotes hard phase (K phase) formation in the coating, improves k-phase morphology, distributes K-phase, decreases the grain size of organization, purifies the grain boundary, reduces other elements accumulation, increases the bonding strength and hardness of coating.
引文
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[7]Gerard Barbezat. Advanced thermal spray technology and coating for lightweight engine blocks for the automotive industry. Surface and Coatings Technology,2005,200:1990-1993
[8]A. Vaidya, T. Streibl, L. Li, et al. An intergrated study of thermal spray process-structure-property correlation. Materials Science and Engineering,2005, A403:191-204;
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[10]J.Esteban Fernandez, Ma del Rocio Fernandez, R.Vijande Diaz, et al. Abrasive wear analysis using factorial experiment design. Wear,2003,255:38-43
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[14]M.P.Panche, H.Liao, B.Normand, et al. Relationship between NiCrBSi particle characteristics and corresponding coating properties using different thermal spraying processing. Surface and Coatings Technology,2005,200:2465-2473
[15]J.M.Miguel, J.M.Guilimany, S.Vizcaino. Tribological study of NiCrBSi coating obtained by different processes. Tribology international,2003,36:181-187
[16]吴子健,吴朝军,曾克里等.热喷涂技术与应用.北京：机械工业出版社, 2005,5-10
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[18]刘光华.稀土固体材料学.北京：机械工业出版社,1997,1-7
[19]Lin Qin, Ye Wen.Behavior of rare earths in solid solution in steel. Chin J Met Technot 1990,6:415-420
[20]Lin Qin, Ye Wen, Li shuantu. Rare earth dissolved in soild solution of steel and its effect on microstructure. J Rare Earths,1990,8(1):55-60
[21]周宏,催昆,孙培祯.稀土在钢中的作用及其加入方法.钢铁研究,1994,78(3)：47-51
[22]林勤.钢中稀土微合金化作用与应用前景.稀土,2001,22(4)：32-36
[23]韦永德,刘志儒.用化学法对20钢、纯Fe表面扩渗稀土元素的研究.金属学报,1983,19(5)：B197-201
[24]黄拿灿,胡社军.稀土化学热处理与稀土材料表面改性.稀土,2003,24(3)：59-63
[25]王世清等.稀土元素在化学热处理中的应用.金属热处理,1988,13(3)：52-59
[26]西安信号工厂.稀土镁合金作还原剂的盐浴渗硼试验.材料保护,1965,5：22-25
[27]李淑华,邵德春.稀土与激光表面重熔对喷涂层耐蚀性的影响.材料科学与工艺,1994,2(20)：91-96
[28]王玉林,沈德久,廖波.稀土在激光熔覆镍基自溶合金中的作用.应用激光,2003,23(3)：139-141
[29]范鹏,易伟,郑昌琼等.稀土对铁基自溶合金自溶性的影响.稀土,1999,20(2)：46-49
[30]尚丽娟,贺春林,才庆魁等.应用稀土及激光熔覆工艺制备钴基合金梯度涂层.中国有色金属学报,2002,12(4)：653-657
[31]Chen Hao, Li Huiqi, Sun Yuzong. Microstructure and Properties of Coatings With Rare Earth Formed by DC-plasma Jet Surface Metallurgy. Surface and Coatings Technology, 2006,200(16-17):4741-4745
[32]Chen Hao, Li Huiqi, Sun Yuzhong. Effect of RE on the CrackingResistance and Microstructure of Coatings Formed by Plasma JetSurface Metallurgy. Journal of Rare Earth,2005.23 (Suppl.) (12):383-386
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