P掺杂对镍基合金-WC复合涂层组织及性能的影响
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摘要
采用火焰钎涂法在钢基体表面制备了不同P掺杂的镍基合金-WC复合涂层。采用SEM,EDS,洛氏硬度及磨损试验等分析测试手段研究了P掺杂对涂层组织与性能的影响,探讨了涂层中裂纹、气孔和夹杂的形成机制。结果表明,涂层中硬质相WC颗粒与镍基体润湿性良好; P掺杂明显加速WC颗粒与镍基体的相互扩散,使WC颗粒边缘脆化,导致涂层中产生大量裂纹; P又极易氧化,使涂层中产生大量气孔和夹杂。当P掺杂从0增加到10%时,涂层硬度由52 HRC下降到30 HRC,同时涂层磨损量急剧增加。因此,P掺杂可增加镍基合金-WC复合涂层中裂纹、气孔和夹杂的形成机率,同时降低涂层的硬度和耐磨性能。
Nickel based alloy-WC composite coating with different doped P were prepared on the steel by means of flame brazing. Effects of doped P on microstructure and properties of nickel based alloy-WC composite coating were studied by means of SEM,EDS,Wear test and Rockwell hardness test. The formation mechanism of cracks,slag and gas cavity were explored. The results show that,the hard-phase WC and nickel matrix had good wettability,P doped could obviously accelerate the inter-diffusion between WC and Nickel matrix,resulting in WC embrittlement and crack that forms in the coating,and P was easily oxidized,resulting in porosity and slag that forms in the coating.Crack,slag and gas cavity can reduce the microhardness of coating from 52 HRC to 30 HRC and the wear amount of the coating is increased sharply when P doped is increased from less than 0% to more than 10%. Therefore,doped p can increase the formation of crack,slag and gas cavity in the coating,and consequently reduce the hardness and wear-resistance of the coating.
Nickel based alloy-WC composite coating with different doped P were prepared on the steel by means of flame brazing. Effects of doped P on microstructure and properties of nickel based alloy-WC composite coating were studied by means of SEM,EDS,Wear test and Rockwell hardness test. The formation mechanism of cracks,slag and gas cavity were explored. The results show that,the hard-phase WC and nickel matrix had good wettability,P doped could obviously accelerate the inter-diffusion between WC and Nickel matrix,resulting in WC embrittlement and crack that forms in the coating,and P was easily oxidized,resulting in porosity and slag that forms in the coating.Crack,slag and gas cavity can reduce the microhardness of coating from 52 HRC to 30 HRC and the wear amount of the coating is increased sharply when P doped is increased from less than 0% to more than 10%. Therefore,doped p can increase the formation of crack,slag and gas cavity in the coating,and consequently reduce the hardness and wear-resistance of the coating.
引文
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[2]杨贤群,王立楠,孙逸铭,等.Si C增强镍基耐磨涂层设计及性能分析[J].聊城大学学报,2016,29(1):47-51.
[3]吴俊升,李晓刚.Si C颗粒尺寸对镍基复合镀层耐磨性和耐蚀性的影响[J].中国有色金属学报,2010,20(1):125-131.
[4]李清建.利用陶瓷-金属复合技术提高部件抗冲刷磨蚀寿命[J].矿石机械,2001(3):60-61.
[5]张欢,郭忠诚,蒋琪英,等.稀土-Ni-W-P-Si C脉冲复合镀层的耐蚀性研究[J].材料热处理学报,20017,28(3):116-120.
[6]刘爽,徐润生,刘晓明.高速火焰喷涂Fe-Al/SiC复合涂层耐热腐蚀性能研究[J].材料保护,2007(11):19-21.
[7]张增志,牛俊杰,付跃文.感应熔覆镍基合金粉末涂层工艺和性能研究[J].材料热处理学报,2004,25(2):31-34.
[8]王振廷,孟君晟,陈丽,等.感应熔覆原位合成自生Ti C/Ni基复合涂层组织和形成机理[J].材料热处理学报,2007,28(6):99-103.
[9]王继东.铁基电弧喷涂铝层的高频感应重熔工艺[J].电镀与精饰,2005,27(3):15-18.
[10]慈文亮,林晨,陶洪伟.碳化钨含量对高频感应熔覆涂层组织及性能的影响[J].金属热处理,2014,39(1):95-98.
[11]吴子健.热喷涂技术与应用[M].北京:机械工业出版社,2005.
[12]王铀.大力发展纳米表面工程[J].热喷涂技术,2011,3(1):8-16.
[13]张国定,赵昌正.金属基复合材料[M].上海:上海交通大学出版社,1993.
[14]Liu Shenglin,Sun Dongbai,Fan Zishuan,et al.Microstructure and properties of plasma clad Ni composite coating[J].Rare Metal Materials and Engineering,2006,35:232-235.
[15]汪路路,王小龙,徐婷,等.重熔时间对WC/镍基合金复合熔覆层微观组织的影响[J].机械制造,2017(4):37-39.
[16]李嘉宁,巩水利,李怀学,等.TA15钛合金激光非晶-纳米晶增强镍基涂层的组织结构及耐磨性[J].焊接学报,2014,35(10):57-60.
[17]朱庆军,邹增大,王新洪.稀土RE对激光熔覆Fe基非晶复合涂层的影响[J].焊接学报,2008,29(2):57-60.
[18]张松,周磊,郝玉喜.Monel合金表面激光熔覆镍基合金的组织及摩擦磨损性能[J].焊接学报,2013,34(1):9-12.
[19]张培磊,李铸国,姚成武,等.激光制备Fe-Ni基非晶复合涂层退火性能分析[J].焊接学报,2011,32(4):13-16.
[20]蔡滨,谭业发,蒋国良,等.(W,Ti)C/石墨/镍基合金复合涂层摩擦磨损性能研究[J].兵工学报,2011,32(2):192-198.
[21]董晓强,王永谦,张楠楠,等.火焰重熔对镍基碳化钨涂层显微结构及性能的影响[J].热加工工艺,2013,42(12):154-157.
[22]周永欣,赵西城,吕振林.Si C颗粒增强钢基体表面复合材料及耐磨性研究[J].铸造技术,2007,8(2):171-174.
[23]祁小群,李秀兵,高义民,等.WC颗粒增强高铬铸铁基表面复合材料喷射口衬板的研制[J].铸造技术,2002,23(5):283-284.
[24]袁晓洲,戴晓光.激光熔覆Ni基WC涂层内铸造WC颗粒溶解特征的研究[J].宁波职业技术学院学报,2013,17(6):106-108.
[25]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,2011,14:103-105.
[26]于美杰,王成国,孙宏飞,等.WC增强镍基复合喷焊层的组织与磨粒磨损性能研究[J].材料热处理学报,2006,27(3):116-120.
[27]丁彰雄,陈伟,王群,等.HVOF制备的多峰WC-12Co涂层摩擦磨损特性[J].摩擦学学报,2011,31(5):425-430.
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