反应氮弧熔覆TiN/Fe基涂层及耐磨耐蚀性能
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摘要
为了提高农业机械入土部件表面性能,采用氮弧熔覆技术在45钢表面反应合成了TiN/Fe金属陶瓷复合涂层。利用扫描电镜、XRD射线衍射仪、显微硬度计、摩擦磨损试验机、电化学工作站分析了涂层形貌、涂层物相、涂层显微硬度及其耐磨耐蚀性能。结果表明:涂层主要由TiN、Fe组成,TiN呈颗粒状,涂层为良好的冶金结合;与45钢相比,涂层硬度提高了约3倍;磨损量降低了约1/2;在3.5%NaCl溶液和5%H2SO4溶液中,45钢的腐蚀速率分别约为TiN涂层的3倍和2倍,TiN涂层具有较好的耐磨耐蚀性能。
In order to improve surface properties of agricultural machinery penetrating parts,TiN/Fe composite coating was prepared on 45 steel specimen surface by reaction nitrogen-arc cladding technique.The morphology,phase,microhardness,wearability and corrosion behavior of the TiN/Fe coating were analyzed by scanning electronic microscope,X-ray diffractometer,microhardness tester,abrasion machine and electrochemical workstation.Contrast test of microhardness,wearability and corrosion behavior had been done between 45 steel and TiN coating.The results show that the coating is composed of TiN and Fe.TiN is granular shape,and the coating is good metallurgical bonding.Compared with the 45 steel,the microhardness of the coating is improved by about 3times and the wear loss is about 1/2times of the 45 steel.The corrosion rate of TiN coating is 1/3times of the 45 steel in 3.5% NaCl solution and about1/2times of the 45 steel in 5% H2SO4 solution.Therefore,the wearability and corrosion resistance of TiN coating is better.
In order to improve surface properties of agricultural machinery penetrating parts,TiN/Fe composite coating was prepared on 45 steel specimen surface by reaction nitrogen-arc cladding technique.The morphology,phase,microhardness,wearability and corrosion behavior of the TiN/Fe coating were analyzed by scanning electronic microscope,X-ray diffractometer,microhardness tester,abrasion machine and electrochemical workstation.Contrast test of microhardness,wearability and corrosion behavior had been done between 45 steel and TiN coating.The results show that the coating is composed of TiN and Fe.TiN is granular shape,and the coating is good metallurgical bonding.Compared with the 45 steel,the microhardness of the coating is improved by about 3times and the wear loss is about 1/2times of the 45 steel.The corrosion rate of TiN coating is 1/3times of the 45 steel in 3.5% NaCl solution and about1/2times of the 45 steel in 5% H2SO4 solution.Therefore,the wearability and corrosion resistance of TiN coating is better.
引文
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[2]杨玉玲,刘常升,张多,等.激光熔覆——激光气体氮化方法制取Ti(CN)-TiN复合熔覆层[J].东北大学学报:自然科学版,2007,28(9):1289-1292.
[3]黄树涛,贾春德,姜增辉,等.TiN涂层刀具高速车铣切削性能及磨损机理[J].哈尔滨工业大学学报,2008,40(9):1501-1505.
[4]Akira Kobayashi.Formation of TiN coatings by gas tunnel type plasma reactive spraying[J].Surface and coatings Technology,2000,132(14):152-157.
[5]赵雪勃,阎殿然,董艳春,等.反应等离子喷涂TiN涂层热处理后的电化学腐蚀性能[J].材料热处理学报,2011,33(4):121-126.
[6]Bacci T,Bertamini L,Ferrari F,et al.Reactive plasma spraying of titanium in nitrogen containing plasma gas[J].Materials Science and Engineering,2000,283(1):189-195.
[7]Soroka E,Lyashenko B,Qiao S,et al.Tribological behaviour and cutting performance of PVD-TiN coating/substrate system with discontinuous surface architecture[J].Rare Metal Materials and Engineering,2011,40(4):580-584.
[8]Zhao C,Hong R P,Guang W X,et al.Annealing studies of TiN films deposited by plasma-assisted CVD[J].Surface and Coatings Technology,2001,138(2):237-241.
[9]郝建军,黄继华,赵建国,等.电火花沉积反应合成TiN增强金属基复合涂层[J].焊接学报,2007,28(10):33-36.
[10]郭立新,刘荣祥,王亚明,等.钛合金表面激光重熔NiCrBSi+TiN涂层的组织研究[J].材料热处理学报,2009,30(2):134-137.
[11]郝建军,黄继华,刘洪杰,等,反应电火花沉积TiN/Ti复合涂层机理与性能[J].材料热处理学报,2009,30(3):170-173.
[12]孙荣禄,王成扬.激光熔覆TiN金属陶瓷涂层的微观组织[J].天津大学学报,2007,40(11):1292-1294
[13]孟君晟,王振廷.TC4合金氩弧熔覆TiN复合涂层的组织及耐磨性[J].黑龙江科技学院学报,2012,22(2):123-126.