激光熔覆Ni基WC复合熔覆层组织与性能的研究
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摘要
通过激光熔覆的方法在Cu-Cr-Zr三元铜合金表面制备Ni60添加不同含量WC颗粒的合金熔覆层。熔覆层的微观组织结构、化学成分、物相组成分别由SEM、EDS、XRD进行表征;显微硬度、耐磨性和耐蚀性也分别由硬度试验机、干滑动摩擦磨损试验机以及电化学工作站进行测试。结果显示,在合适的工艺参数下,可以得到冶金结合良好,没有缺陷,组织均匀且致密的激光熔覆层。含WC的熔覆层组织中,主要含有Cr7C3、Cr23C6、CrB、NiSi3、γ(Ni,Fe)、W2C、Cr2W4C、WC等相。熔覆层平均硬度可达基体的7倍以上,并且随WC含量增加逐渐增加。熔覆层耐磨性随WC含量增加也逐渐提高,摩擦系数和磨损量均下降明显。熔覆层的耐蚀性随WC含量的增加先提高,后降低,其中WC含量为15%时熔覆层的耐蚀性最好。
Laser clad Ni-based WC composite coating was fabricated on Cu-Cr-Zr ternary copper alloy by using a fiber laser.The microstructure,composition,microhardness,wear resistance and corrosion resistance of the coating with different content of WC particles were researched by means of SEM,EDS and XRD,hardness tester,wear tester and electrochemical workstation,respectively.The results showed that the laser cladding layer with favorable metallurgical bonding,no defect and uniform structure could be obtained under the appropriate process parameters.The main phases of the laser cladding layer were Cr7C3,Cr23C6,CrB, NiSi3,γ(Ni,Fe)W2C,Ni2W4C and WC.The average hardness of the composite coating could reach more than 7 times that of the substrate and increase with the increase of WC content.The friction coefficient and wear loss of the cladding layer decreased with the increase of WC content,which indicated that the wear resistance was improved.The corrosion resistance of the cladding layer first increases and then decreases with the increase of WC content and the best corrosion resistance could be obtained when WC content was 15%.
Laser clad Ni-based WC composite coating was fabricated on Cu-Cr-Zr ternary copper alloy by using a fiber laser.The microstructure,composition,microhardness,wear resistance and corrosion resistance of the coating with different content of WC particles were researched by means of SEM,EDS and XRD,hardness tester,wear tester and electrochemical workstation,respectively.The results showed that the laser cladding layer with favorable metallurgical bonding,no defect and uniform structure could be obtained under the appropriate process parameters.The main phases of the laser cladding layer were Cr7C3,Cr23C6,CrB, NiSi3,γ(Ni,Fe)W2C,Ni2W4C and WC.The average hardness of the composite coating could reach more than 7 times that of the substrate and increase with the increase of WC content.The friction coefficient and wear loss of the cladding layer decreased with the increase of WC content,which indicated that the wear resistance was improved.The corrosion resistance of the cladding layer first increases and then decreases with the increase of WC content and the best corrosion resistance could be obtained when WC content was 15%.
引文
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[16]Li Zebang.Study on microstructure and properties of laser cladding layer of Ni based composite powder[D].Ji'nan:Shandong University,2013(in Chinese).李泽邦.Ni基复合粉末激光熔覆层组织与性能的研究[D].济南:山东大学,2013.
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[18]Farahmand P,Kovacevic R.Corrosion and wear behavior of laser cladded Ni-WC coatings[J].Surface and Coatings Technology,2015,276:121-135.
[19]Wang Yubin.Study on microstructure and properties of ceramic particle reinforced Ni60A laser cladding[D].Ji'nan:Shandong University,2012(in Chinese).王予彬.陶瓷颗粒增强Ni60A激光熔覆层的组织与性能的研究[D].济南:山东大学,2012.
[2]Wang Kaiming,Lei Yongping,Fu Hanguang,et al.Effect of power on microstructure and hardness of laser cladding Ni based WC coating[J].Rare Metal Materials and Engineering,2017,46(11):3474-3478(in Chinese).王开明,雷永平,符寒光,等.功率对激光熔覆Ni基WC涂层组织与硬度的影响[J].稀有金属材料与工程,2017,46(11):3474-3478.
[3]Xu Guojian,Huang Xue,Fu Xinhao,et al.Laser cladding microstructure of Ni-based alloy and WC mixed powder[J].Cemented Carbide,2012,29(5):297-301(in Chinese).徐国建,黄雪,傅新皓,等.Ni基合金与WC混合粉末的激光熔覆层组织[J].硬质合金,2012,29(5):297-301.
[4]Fu Yuming,Gao Zhongtang,Zheng Lijuan.Research on technological parameters of laser cladding Ni-based alloy with WC[J].Hot Working Technology,2011,40(14):102-105(in Chinese).付宇明,高中堂,郑丽娟.镍基碳化钨合金粉末激光熔覆工艺的研究[J].热加工工艺,2011,40(14):102-105.
[5]Heidarzadeh A,Saeid T.Correlation between process parameters,grain size and hardness of friction-stir-welded Cu-Zn alloys[J].Rare Metals,2018,37(5):388-398.
[6]Siddiqi Z M,Amin M M.Effect of South China Sea water on corrosion behaviour of copper alloy and mild steel[J].Asian Journal of Water,Environment and Pollution,2017,14(1):1-8.
[7]Li Mingyu,Chao Mingju,Liang Erjun,et al.Study on laser Surface strengthening of Cu material[J].China Laser,2011,38(8):65-69(in Chinese).李明玉,晁明举,梁二军,等.Cu材料激光表面强化研究[J].中国激光,2011,38(8):65-69.
[8]Liu Fang,Liu Changsheng,Tao Xingqi,et al.Laser cladding nickel base alloy on mold copper plate[J].Journal of Northeastern University Natural Science,2006,27(10):1106-1109(in Chinese).刘芳,刘常升,陶兴启,等.结晶器铜板上激光熔覆镍基合金[J].东北大学学报(自然科学版),2006,27(10):1106-1109.
[9]Dehm G,Bamberger M.Laser cladding of Co-based hardfacing on Cu substrate[J].Journal of Materials Science,2002,37(24):5345-5353.
[10]Si S,Yuan X,Liu Y,et al.Effect of laser power on microstructure and wear resistance of WCp/Ni cermet coating[J].Journal of iron and steel research,International,2006,13(3):74-78.
[11]Przybyowicz J,Kusiński J.Structure of laser cladded tungsten carbide composite coatings[J].Journal of Materials Processing Technology,2001,109(1-2):154-160.
[12]Farahmand P,Kovacevic R.Laser cladding assisted with an induction heater(LCAIH)of Ni-60%WC coating[J].Journal of Materials Processing Technology,2015,222:244-258.
[13]Wang Kaiming,Lei Yongping,Wei Shizhong,et al.Effect of WC content on microstructure and properties of laser cladding Ni-based WC composite coating[J].Journal of Heat Treatment of Materials,2016,37(7):172-179(in Chinese).王开明,雷永平,魏世忠,等.WC含量对激光熔覆Ni基WC复合涂层组织和性能的影响[J].材料热处理学报,2016,37(7):172-179.
[14]Liu Fang,Liu Changsheng,Chen J Y,et al.Laser in situ W2C strengthened nickel based coating on copper alloy[J].Journal of Materials Research,2007,21(5):496-500(in Chinese).刘芳,刘常升,陈岁元,等.铜合金表面激光原位自生W2C增强镍基涂层[J].材料研究學報,2007,21(5):496-500.
[15]Yong Yaowei,Fu Wei,Zhang Xiang,et al.In-situ of WC/TaC reinforced Ni-based composite alloy coating by laser cladding[J].Rare Metal Materials and Engineering,2017,46(11):3176-3181(in Chinese).雍耀维,傅卫,张翔,等.原位生成WC/TaC复合激光熔覆层组织研究[J].稀有金属材料与工程,2017,46(11):3176-3181.
[16]Li Zebang.Study on microstructure and properties of laser cladding layer of Ni based composite powder[D].Ji'nan:Shandong University,2013(in Chinese).李泽邦.Ni基复合粉末激光熔覆层组织与性能的研究[D].济南:山东大学,2013.
[17]Wang Yibo.Laser cladding to prepare wear-resistant and corrosion-resistant coatings[D].Harbin:Harbin University of Engineering,2009(in Chinese).王一博.激光熔覆制备耐磨耐蚀涂层[D].哈尔滨:哈尔滨工程大学,2009.
[18]Farahmand P,Kovacevic R.Corrosion and wear behavior of laser cladded Ni-WC coatings[J].Surface and Coatings Technology,2015,276:121-135.
[19]Wang Yubin.Study on microstructure and properties of ceramic particle reinforced Ni60A laser cladding[D].Ji'nan:Shandong University,2012(in Chinese).王予彬.陶瓷颗粒增强Ni60A激光熔覆层的组织与性能的研究[D].济南:山东大学,2012.