第42卷第12期 2012年12月
涂料工业
PAINT & COATINGS INDUSTRY
Vol.42No.12 Dee.2012
激光熔覆法纳米FeAl/AlO梯度涂层在钢板上的应用研究
张金升张贤军？贺中国，秀红，王彦敏”，李嘉”
（1.山东交通学院材料科学与工程学院，济南250023：2.横店集团浙江英洛华电子有限公司，浙江东阳322118；3，济南大学材料科学与工程学院，济南250022）
摘要：利用激光熔覆法在45*钢板上制备了纳米Fe,A1/A1,O，梯度涂层。利用扫描电镜对涂层微观结构进行表征，用HDX-1000数字式显微硬度计测试梯度涂层的显微硬度，用MM200磨损实验机进行干滑动磨损试验，用焊点热电偶法测试涂层材料的热障性能，进行抗热震试验以反映和表征梯度涂层材料的界面结合强度和耐久性。实验结果表明：所制得梯度材料的组成、结构和性能均呈梯度变化，硬度、耐磨性、热障性能、耐氧化腐蚀性能均有显著提高，具备涂层材料的功能优势，梯度涂层材料抗热震性优良，提高了涂层结合强度，从而可保障功能梯度材料作为工程材料的可靠性和耐久性。
关键调：钢板；Fe,A/Al,O,：梯度涂层；显微结构：性能
中图分类号：TQ639
文章编号：0253-4312（2012)12-0061-04
文献标识码：A
ApplicationofFe,AVAl,O,FunctionalGradient
Coatings by Laser Gladding on Steelplate
Zhang Jinsheng', Zhang Xianjun’, He Zhongguo', Hao Xiuhong', Wang Yanmin', Li Jia(1.School of Materials of Science & Engineering, Shandong Jiaotong Unieersity, Jinan 250023, China;
2.Zhejiang Yingluohua Electronics Co.,Ld. Dongyang,Zhejiang 322118, China; 3. School of Materials of Science & Engineering, Unieersity of Jinan, Jinan 250022, China)
Abstract:The Fe, Al/Al,O, functional gradient coating (FCM) was prepared by laser gladding process. The microstructure of the FGM coatings was revealed by scanning electronic microscopy (SEM), The micro-hardness, wearing weight loss, thermal barrier property, interfacial bonding strength and thermal shock re sistance were respectively studied by using HDX 1000 idgital microhardness tester, MM200 wearing tester, and thermoconples, The results indicated that the chemical composition, microstructure and properties of prepared coatings were all changed according to graded distribution, and the microhardness, wearing weight loss, thermal barrier property and corrosion resistance were all enhanced significantly. The prepared coatings showed superiority as functional coatings. The gradient coatings could provide excellent thermal shock resist-ance, and the interfacial bonding strength was greatly improved, which ensured the reliability and durability as engineering material.
Key Words: steelplate; Fe, Al/Al,O,; functional gradient coating; microstructure; properties
梯度涂层材料可以有效缓解涂层界面热应力，提高涂层结合强度，使涂层材料更好地发挥功能作用1-4]。激光熔覆法是利用高能激光束于工件表面上熔覆一层成分和性能与基体截然不同的新合金（或陶瓷）涂层，它的特点是：(1)有足够的工程厚度（相对PVD、CVD镀层）：（2）涂层内部、涂层与基体均为冶金结合（相对于氧-乙炔和等离子喷涂）：（3）性能
（如耐磨性、耐腐蚀性）和成分可调（可根据工况环境调整成分、性能和厚度）：（4）由于涂层致密均匀，能更有效地提高涂层硬度和耐蚀性等[3-9]
FeAI是一种重要的金属间化合物材料.它具有一系列优异的性能，如高比强、低塑性/韧性合金：熔点高、硬度高、抗氧化性好、高的蜗变和抗疲劳强度、密度小、成本低、强度的负温
【基金项目】基于生物模板剪载设计的分组多乱氧化物金属复合材科的制合成，基金编号（51172095）；山东文通学院科研基金：的微来梯度涂
层的研究，项目编号（Z200616)）
作者简介：张全升（1958一），男，工学博士，教投，主委从事智能材料、纳来材料、建筑材料的研究。
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