Effect of Pulse Width on Microstructure and Hardness of FeSiB Coatings by Laser Cladding
GONG Yu-bing1, WANG Shan-lin1, LI Hong-xiang2, KE Li-ming1, CHEN Yu-hua1, MA Bin1
1. National Defence Key Disciplines Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang 330063, China;
2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
Abstract：High-density coating with FeSiB amorphous ribbons as cladding materials on the surface of mild steel was fabricated by laser cladding. The effect of different pulse widths on formability, microstructure and microhardness of the coatings was analyzed by optical microscope(OM), X-ray diffractometer (XRD), scanning electron microscope (SEM) and microhardness tester. The results show that with the increase of the pulse width, the coating dilute rate rises; the tendency of crack increases and the crack originates from surface to the interface; the degree of crystallization increases and crystallization phases are α-Fe, Fe2B and Fe3Si, fusion zone width increases and the trend of columnar crystals along the epitaxial growth becomes bigger and bigger; the microhardness firstly increases and then decreases. When pulse width is 3.2ms, the structure of the coating is compact, no hole defects, the interface exhibits a good metallurgical combination and the dilute rate is low about 23.2%. Average microhardness of the coating reaches 1192HV, which is about 10 times as much as the substrate.
龚玉兵, 王善林, 李宏祥, 柯黎明, 陈玉华, 马彬. 脉冲宽度对激光熔覆FeSiB涂层组织与硬度的影响[J]. 材料工程, 2018, 46(3): 74-80.
GONG Yu-bing, WANG Shan-lin, LI Hong-xiang, KE Li-ming, CHEN Yu-hua, MA Bin. Effect of Pulse Width on Microstructure and Hardness of FeSiB Coatings by Laser Cladding. Journal of Materials Engineering, 2018, 46(3): 74-80.
[1] 魏丹丹,陈庆军,高霁雯,等. 铁基大块非晶合金的发展现状[J].稀有金属材料与工程, 2009, 38(增刊1):80-85. WEI D D, CHEN Q J, GAO J W, et al. Current status of Fe-based bulk amorphous alloy research[J]. Rare Metal Materials and Engineering, 2009, 38(Suppl 1):80-85.
[2] 刘繁茂,张慧燕,张涛.块体非晶合金的形成能力和磁性能[J].材料工程, 2014(10):6-10. LIU F M, ZHANG H Y, ZHANG T. Glass forming ability and magnetic properties of Fe-Nd-B-Zr bulk metallic glasses[J].Journal of Materials Engineering, 2014(10):6-10.
[3] SCULLY J R, GEBERT A, PAYER J H. Corrosion and related mechanical properties of bulk metallic glasses[J]. Journal of Materials Research, 2007,22(2):302-313.
[4] SHEN J, CHEN Q J, SUN J F, et al. Exceptionally high glass-forming ability of an FeCoCrMoCBY alloy[J]. Applied Physics Letters,2005,86(15):151907.
[5] 马世榜,苏彬彬,王旭,等.基于激光熔覆SiC/Ni复合涂层的耐磨性[J].材料工程,2016,44(1):77-82. MA S B,SU B B,WANG X,et al.Wear resistance of SiC/Ni composite coating based on laser cladding[J].Journal of Materials Engineering, 2016,44(1):77-82.
[6] 付贵忠,孔德军,张垒. 激光淬火后Cr12MoV渗铬层的摩擦与磨损性能[J].材料工程,2016,44(4):51-58. FU G Z, KONG D J, ZHANG L. Friction and wear properties of Cr12MoV chromized layer after laser quenching[J].Journal of Materials Engineering,2016,44(4):51-58.
[7] 刘昊,虞钢,何秀丽,等.粉末性质对同轴送粉激光熔覆中粉末流场的影响规律[J].中国激光, 2013,40(5):0503008. LIU H, YU G, HE X L,et al. Effect of powder properties on the convergence of powder stream in coaxid laser cladding[J]. Chinese Journal of Lasers, 2013, 40(5):0503008.
[8] LI R F, LI Z G, ZHU Y Y, et al. Structure and corrosion resistance properties of Ni-Fe-B-Si-Nb amorphous composite coatings fabricated by laser processing[J].Journal of Alloys and Compounds,2013, 580:327-331.
[9] ZHU Y Y, LI Z G, LI R F, et al. Microstructure and property of Fe-Co-B-Si-C-Nb amorphous composite coating fabricated by laser cladding process[J]. Applied Surface Science,2013,280:50-54.
[10] GARGARELLA P, ALMEIDA A, VILAR R, et al. Formation of Fe-based glassy matrix composite coatings by laser processing[J].Surface and Coatings Technology, 2014,240:336-343.
[11] WANG Y F, LU Q L, XIAO L J, et al. Laser cladding Fe-Cr-Si-P amorphous coatings on 304L stainless[J].Rare Metal Materials and Engineering, 2014, 43(2):274-277.
[12] ZHANG P L, LU Y L, YAN H, et al. Effect of Nb addition on Fe-Ni-B-Si amorphous and crystalline composite coatings by laser processing[J].Surface and Coatings Technology, 2013, 236:84-90.
[13] 鲁青龙,王彦芳,栗荔,等.扫描速度对激光熔覆Fe基非晶复合涂层组织与性能的影响[J].中国激光,2013,40(2):0203007. LU Q L, WANG Y F, LI L, et al. Effects of scanning speed on microstructure and properties of laser cladding Fe-based amorphous composite coatings[J]. Chinese Journal of Lasers, 2013, 40(2):0203007.
[14] 乔虹,李庆棠,符寒光,等.激光熔覆工艺参数对Fe-Cr-B合金涂层组织和硬度的影响[J].材料热处理学报,2014,35(2):164-169. QIAO H, LI Q T, FU H G, et al. Effect of processing parameter on microstructure and hardness of Fe-Cr-B alloy coating by laser cladding[J].Transactions of Materials and Heat Treatment, 2014,35(2):164-169.
[15] 侯纪新,章顺虎,蒋小舟,等. 激光熔覆工艺参数及微合金元素对Fe基非晶复合涂层显微硬度的影响[J]. 应用激光, 2015, 35(4):402-407. HOU J X, ZHANG S H, JIANG X Z, et al. Effect of laser cladding parameters and micro-alloy elements on the micro-hardness of Fe-based amorphous composite coating[J]. Applied Laser, 2015, 35(4):402-407.
[16] ZHOU S F, HUANG Y J, ZENG X Y. Effects of processing parameters on structure of Ni-based WC composite coatings during laser induction hybrid rapid cladding[J]. Applied Surface Science,2009, 255(20):8494-8500.
[17] 范文中,赵全忠.超短脉冲激光微焊接玻璃进展[J].激光与光电子学进展,2015,52:080001. FAN W Z,ZHAO Q Z.Recent progress in ultrashort pulsed laser microwelding of glasses[J].Laser & Optoelectronics Progress, 2015, 52:080001.
[18] 卢兰志. Fe基非晶合金涂层设计与制备及性能研究[D].北京:北京工业大学, 2010. LU L Z. Fe-based amorphous alloy coating and its properties[D].Beijing:Beijing University of Technology,2010.
2018, Vol. 46 
