亚微米TiC/B_4C颗粒对激光熔覆Stellite涂层组织及性能影响
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摘要
通过激光熔覆在304不锈钢表面制备了Stellite 12涂层,研究了添加不同质量分数的Ti/B_4C对Stellite 12涂层组织及性能的影响,分析了涂层组织的生长,测试了涂层的显微硬度及耐磨性能。研究结果表明,Stellite 12涂层主要由面心立方的γ-Co与Cr_7C_3相组成。随着Ti/B_4C的添加,涂层原位合成了TiC亚微米颗粒相。残存的B_4C作为异质形核点,形成了亚微米结构TiC/B_4C强化相,且颗粒尺寸逐渐减小。TiC/B_4C颗粒对涂层晶粒有细化作用。涂层显微硬度随着添加Ti/B_4C的质量分数的增加逐渐增大,最高为624 HV。涂层耐磨性能随添加的Ti/B_4C质量分数的增加逐渐增强。
The Stellite 12 coating is synthetized on the 304 stainless steel surface by laser cladding, and the effect of the addition of Ti/B_4C with different contents on the microstructure and properties of the Stellite 12 coating is discussed. The microstructural growth of the coating is analyzed, and the microhardness and wear resistance of the coating are also tested. The research results show that the Stellite 12 coating is mainly composed of face-centered cube γ-Co and Cr_7C_3 phases. The in-situ TiC sub-micron particle phase is synthesized with the addition of Ti/B_4C. The remaining B_4C acts as a heterogeneous nucleation point, and thus a TiC/B_4C strengthening phase with sub-micron structure is formed and the particle size gradually decreases. The TiC/B_4C particles have an obvious grain refinement effect on the coating. The micro-hardness of the coating gradually increases with the addition of Ti/B_4C with the maximum value of 624 HV. In addition, the wear resistance of the coating gradually increases with the addition of Ti/B_4C.
The Stellite 12 coating is synthetized on the 304 stainless steel surface by laser cladding, and the effect of the addition of Ti/B_4C with different contents on the microstructure and properties of the Stellite 12 coating is discussed. The microstructural growth of the coating is analyzed, and the microhardness and wear resistance of the coating are also tested. The research results show that the Stellite 12 coating is mainly composed of face-centered cube γ-Co and Cr_7C_3 phases. The in-situ TiC sub-micron particle phase is synthesized with the addition of Ti/B_4C. The remaining B_4C acts as a heterogeneous nucleation point, and thus a TiC/B_4C strengthening phase with sub-micron structure is formed and the particle size gradually decreases. The TiC/B_4C particles have an obvious grain refinement effect on the coating. The micro-hardness of the coating gradually increases with the addition of Ti/B_4C with the maximum value of 624 HV. In addition, the wear resistance of the coating gradually increases with the addition of Ti/B_4C.
引文
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[11] Zhang T G, Sun R L. Microstructure and properties of nano-Ti3Al laser cladding layer prepared on Ti811 alloy surface[J]. Chinese Journal of Lasers, 2018, 45(1): 0102002. 张天刚, 孙荣禄. Ti811表面原位生成纳米Ti3Al激光熔覆层的组织和性能[J]. 中国激光, 2018, 45(1): 0102002.
[12] Wang Z T, Zhou X H, Zhao G G. Microstructure and formation mechanism of in-situ TiC-TiB2/Fe composite coating[J]. Transactions of Nonferrous Metals Society of China, 2008, 18(4): 831-835.
[13] Li G. Microstructure and properties of Co-based alloy laser cladding layer reinforcement by TiC[D]. Jinan: Shandong University, 2016: 21-43. 李根. TiC增强钴基合金激光熔覆层组织及性能的研究[D]. 济南: 山东大学, 2016: 21-43.
[14] Qiao H, Li Q T, Fu H G, et al. Microstructure and micro-hardness of in situ synthesized TiC particles reinforced Fe-based alloy composite coating by laser cladding[J]. Materialwissenschaft Und Werkstofftechnik, 2014, 45(2): 85-90.
[15] Zhang P L, Liu X P, Lu Y L, et al. Microstructure and wear behavior of Cu-Mo-Si coatings by laser cladding[J]. Applied Surface Science, 2014, 311: 709-714.
[16] Liu X P, Zhang P L, Yan H, et al. Microstructure and wear properties of Ni-W-Si coatings by laser cladding[J]. Applied Mechanics and Materials, 2015, 750: 214-219.
[2] Kusmoko A, Dunne D, Li H J. Effect of heat input on stellite 6 coatings on a medium carbon steel substrate by laser cladding[J]. Materials Today: Proceedings, 2015, 2(4/5): 1747-1754.
[3] Chai R X, Li K K, Guo W, et al. Effect of heat treatment process on microstructures and properties of 304 stainless steel cladding layers[J]. Laser & Optoelectronics Progress, 2018, 55(5): 051404. 柴蓉霞, 李凯凯, 郭卫, 等. 热处理工艺对304不锈钢熔覆层组织和性能的影响[J]. 激光与光电子学进展, 2018, 55(5): 051404.
[4] Zhai J H, Xu H Y, Liu Z J, et al. Experimental study on laser cladding of Ni-based alloys on spheroidal graphite cast iron surface[J]. Laser & Optoelectronics Progress, 2017, 54(10): 101412. 翟建华, 许慧印, 刘志杰, 等. 球墨铸铁表面激光熔覆镍基合金试验研究[J]. 激光与光电子学进展, 2017, 54(10): 101412.
[5] Li M C, Zhang P L, Zhuang Q Q, et al. Microstructure and micromechanical features of Ni-Mo-Si coatings on copper plate surfaces by laser cladding[J]. Chinese Journal of Lasers, 2017, 44(12): 1202004. 李明川, 张培磊, 庄乔乔, 等. 铜板表面激光熔覆Ni-Mo-Si涂层的组织和微观力学性能[J]. 中国激光, 2017, 44(12): 1202004.
[6] Li Z Y, Zhao W Y, Gu W Q, et al. Effect of Ti on microstructure and properties of Co-based alloy coating by laser cladding[J]. Chinese Journal of Lasers, 2010, 37(8): 2086-2090. 李志远, 赵伟毅, 古文全, 等. Ti对Co基合金激光熔覆层组织与性能的影响[J]. 中国激光, 2010, 37(8): 2086-2090
[7] Du B S, Zou Z D, Wang X H, et al. In situ synthesis of TiC-TiB2 reinforced FeCrSiB composite coating by laser cladding[J]. Surface Review and Letters, 2007, 14(2): 315-319.
[8] Motallebzadeh A, Atar E, Cimenoglu H. Sliding wear characteristics of molybdenum containing Stellite 12 coating at elevated temperatures[J]. Tribology International, 2015, 91: 40-47.
[9] Li M Y, Han B, Wang Y, et al. Effects of B4C and Ti contents on structure and property of laser cladding Fe-Cr-Ni-Si alloy coatings[J]. Chinese Journal of Lasers, 2013, 40(12): 1203008. 李美艳, 韩彬, 王勇, 等. B4C和Ti含量对激光熔覆Fe-Cr-Ni-Si系合金涂层结构及性能影响[J]. 中国激光, 2013, 40(12): 1203008.
[10] Li M X. Study on laser cladding cobalt based alloy and its nano-composite coatings[D]. Nanjing: Southeast University, 2004: 28-64. 李明喜. 钴基合金及其纳米复合材料激光熔覆涂层研究[D]. 南京: 东南大学, 2004: 28-64.
[11] Zhang T G, Sun R L. Microstructure and properties of nano-Ti3Al laser cladding layer prepared on Ti811 alloy surface[J]. Chinese Journal of Lasers, 2018, 45(1): 0102002. 张天刚, 孙荣禄. Ti811表面原位生成纳米Ti3Al激光熔覆层的组织和性能[J]. 中国激光, 2018, 45(1): 0102002.
[12] Wang Z T, Zhou X H, Zhao G G. Microstructure and formation mechanism of in-situ TiC-TiB2/Fe composite coating[J]. Transactions of Nonferrous Metals Society of China, 2008, 18(4): 831-835.
[13] Li G. Microstructure and properties of Co-based alloy laser cladding layer reinforcement by TiC[D]. Jinan: Shandong University, 2016: 21-43. 李根. TiC增强钴基合金激光熔覆层组织及性能的研究[D]. 济南: 山东大学, 2016: 21-43.
[14] Qiao H, Li Q T, Fu H G, et al. Microstructure and micro-hardness of in situ synthesized TiC particles reinforced Fe-based alloy composite coating by laser cladding[J]. Materialwissenschaft Und Werkstofftechnik, 2014, 45(2): 85-90.
[15] Zhang P L, Liu X P, Lu Y L, et al. Microstructure and wear behavior of Cu-Mo-Si coatings by laser cladding[J]. Applied Surface Science, 2014, 311: 709-714.
[16] Liu X P, Zhang P L, Yan H, et al. Microstructure and wear properties of Ni-W-Si coatings by laser cladding[J]. Applied Mechanics and Materials, 2015, 750: 214-219.