金属基复合材料WC/SS316L超音速激光沉积行为及电化学失效机理

【摘要】利用超音速激光沉积技术在316L基体上制备了WC/SS316L复合沉积层,并分析了该复合沉积层中颗粒的沉积行为、界面结合、组织结构特征以及其在电化学环境下的失效机理。研究结果表明,由于激光辐照的软化作用,SS316L颗粒在高速撞击过程中表现出较好的塑性变形能力,能够实现有效沉积;在激光辐照和高速粒子塑性变形的双重作用下,超音速激光沉积层较单一冷喷(CS)沉积层具有更好的界面结合行为。由于高速粒子塑性变形产生了加工硬化现象,沉积层中SS316L的显微硬度较原始粉末的明显增大。在电化学腐蚀环境下,WC/SS316L界面较易发生腐蚀行为。

【关键词】 激光技术; 超音速激光沉积; WC/SS316L复合沉积层; 沉积行为; 电化学失效机理;

【DOI】

【基金资助】 NSFC-浙江两化融合联合基金(U1509201) 浙江省自然科学基金(LQ17E050009) 浙江省公益技术应用研究项目(2017C31048) 高等学校学科创新引智计划(110000213920168001)

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    References

    [1]Yuan Q L,Feng X D,Cao J J,et al.Research on microstructure of Ni-based alloy coating by laser cladding[J].Chinese Journal of Lasers,2010,37(8):2116-2120.

    [2]Wu D J,Chu Y,Niu F Y,et al.Influence of temperature distribution of ceramic coating using tophat assistant laser beam in dual-beam laser cladding[J].Chinese Journal of Lasers,2014,41(7):0703012.

    [3]Shan X H,Wang C S,Yu Q.Microstructure and property of Nb-Al-Ti high temperature alloy coatings by laser cladding on Ti alloy surface[J].Chinese Journal of Lasers,2016,43(8):0802015.

    [4]Duan X X,Gao S Y,Gu Y F,et al.Study on reinforcement mechanism and frictional wear properties of 316L-SiC mixed layer deposited by laser cladding[J].Chinese Journal of Lasers,2016,43(1):0103004.

    [5]Lupoi R,Sparkes M,Cockburn A,et al.High speed titanium coatings by supersonic laser deposition[J].Materials Letters,2011,65(21/22):3205-3207.

    [6]Jones M,Cockburn A,Lupoi R,et al.Solid-state manufacturing of tungsten deposits onto molybdenum substrates with supersonic laser deposition[J].Materials Letters,2014,134:295-297.

    [7]Yao J,Li Z,Li B,et al.Characteristics and bonding behavior of Stellite 6 alloy coating processed with supersonic laser deposition[J].Journal of Alloys&Compounds,2016,661:526-534.

    [8]Yang L J,Li Z H,Li B,et al.Microstructure and deposition mechanism of Ni60coatings prepared by supersonic laser deposition[J].Chinese Journal of Lasers,2015,42(3):0306005.

    [9]Yang L,Li B,Yao J,et al.Effects of diamond size on the deposition characteristic and tribological behavior of diamond/Ni60composite coating prepared by supersonic laser deposition[J].Diamond and Related Materials,2015,58:139-148.

    [10]Li B,Yao J,Zhang Q,et al.Microstructure and tribological performance of tungsten carbide reinforced stainless steel composite coatings by supersonic laser deposition[J].Surface&Coatings Technology,2015,275:58-68.

    [11]Li Z H,Yang L J,Li B,et al.Microstructural characteristics of WC/Stellite 6 composite coating prepared by supersonic laser deposition[J].Chinese Journal of Lasers,2015,42(11):1106002.

    [12]Li P H,Li B,Zhang Q L,et al.Comparative study on microstructure and performance of WC/SS316Lcomposite coating prepared by supersonic laser deposition and laser cladding[J].Chinese Journal of Lasers,2016,43(11):1102002.

    [13]Li Z H,Yang L J,Zhang Q L,et al.Comparative research of Stellite 6coatings prepared by supersonic laser deposition and laser cladding[J].Chinese Journal of Lasers,2015,42(5):0503008.

    [14]Li B,Yang L,Li Z,et al.Beneficial effects of synchronous laser irradiation on the characteristics of cold-sprayed copper coatings[J].Journal of Thermal Spray Technology,2015,24(5):836-847.

    [15]Assadi H,Kreye H,Grtner F,et al.Cold spraying---A materials perspective[J].Acta Materialia,2016,116:382-407.

    [16]Borchers C,Grtner F,Stoltenhoff T,et al.Microstructural and macroscopic properties of cold sprayed copper coatings[J].Journal of Applied Physics,2003,93(12):10064-10070.

    [17]Xiong Y,Kang K,Bae G,et al.Dynamic amorphization and recrystallization of metals in kinetic spray process[J].Applied Physics Letters,2008,92(19):857-875.

This Article

ISSN:0258-7025

CN: 31-1339/TN

Vol 45, No. 01, Pages 90-96

January 2018

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摘要

  • 1 引言
  • 2 实验材料和方法
  • 3 实验结果与分析
  • 4 结论
  • 参考文献