Cr<sub>3</sub>C<sub>2</sub>掺杂Ni-P-PTFE化学复合镀层制备及性能

doi:10.19976/j.cnki.43-1448/TF.2024083

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摘要为提高以铁素体不锈钢为基体的医疗器械零部件表面的耐蚀性和硬度,本研究采用化学复合镀的方法在铁素体不锈钢表面制备xCr₃C₂/Ni-P-PTFE(聚四氟乙烯,polytetrafluoroethylene)镀层,研究Cr₃C₂质量浓度(10、15、20 g/L)对化学复合镀Ni-P-PTFE镀层热处理前后硬度、表面形貌、物相以及耐蚀性的影响。结果表明：在一定质量浓度下,Cr₃C₂颗粒的掺杂使Ni-P-PTFE镀层表面更加平整光滑,降低表面粗糙度的同时提高硬度和耐蚀性。Cr₃C₂质量浓度为15 g/L时,Ni-P-PTFE-Cr₃C₂镀层表面均匀平整,粗糙度最小,硬度(HV_0.1)为354;表面腐蚀电流密度从0.05 μA/cm²下降到0.02 μA/cm²,降低了60%,表现出较好的耐蚀性;热处理(300 ℃、2 h)后,由于Ni₃P硬相和Ni相的析出,镀层硬度(HV_0.1)达到527,提高了约49%。Ni-P-PTFE-Cr₃C₂镀层能有效改善医疗器械零件用钢基体的性能。

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	王建刚
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	王玉江

关键词 ： Ni-P-PTFE-Cr₃C₂, 化学复合镀, 医疗器械零件用钢, 硬度, 耐蚀性

Abstract：To enhance the corrosion resistance and hardness of the surface of medical device components based on ferritic stainless steel, this study employed a chemical composite plating method to prepare xCr₃C₂/Ni-P-PTFE (polytetrafluoroethylene) coatings on the surface of ferritic stainless steel. The influences of Cr₃C₂ mass concentrations (10, 15, 20 g/L) on the hardness, surface morphology, phase composition, and corrosion resistance of the Ni-P-PTFE chemical composite plating coatings before and after heat treatment were investigated. The results indicate that the incorporation of Cr₃C₂ particles at a certain mass concentration results in a smoother and more even surface of the Ni-P-PTFE coating, reducing surface roughness while enhancing hardness and corrosion resistance. When the Cr₃C₂ mass concentration is 15 g/L, the Ni-P-PTFE-Cr₃C₂ coating exhibits a uniform and smooth surface with the lowest roughness and a hardness (HV_0.1) of 354; the surface corrosion current density decreases from 0.05 μA/cm2 to 0.02 μA/cm2, representing a 60% reduction and indicating superior corrosion resistance; after heat treatment (300 ℃, 2 h), due to the precipitation of Ni3P hard phase and Ni phase in the coating, the hardness (HV0.1) reaches 527, representing an increase of approximately 49%. The Ni-P-PTFE-Cr3C2 coating effectively improves the performance of the steel substrate used in medical device components.

Key words： Ni-P-PTFE-Cr₃C₂ chemical composite plating steel for medical device component hardness corrosion resistance

收稿日期: 2024-09-30 出版日期: 2025-02-05

ZTFLH:

TG174.4

基金资助:河北省重点研发计划项目(22351009D);河北省教育厅重点项目(ZD2020189);石家庄市科技计划项目—重大科技专项(246081487A)

通讯作者: 王玉江,副研究员,博士。电话：18810765728;E-mail: hitwyj@126.com

引用本文:

王建刚, 许美琦, 王雪, 孙逸涵, 王玉江. Cr₃C₂掺杂Ni-P-PTFE化学复合镀层制备及性能[J]. 粉末冶金材料科学与工程, 2024, 29(6): 514-521.
WANG Jiangang, XU Meiqi, WANG Xue, SUN Yihan, WANG Yujiang. Preparation and properties of Cr₃C₂-doped Ni-P-PTFE chemical composite coating. Materials Science and Engineering of Powder Metallurgy, 2024, 29(6): 514-521.

链接本文:

http://pmbjb.csu.edu.cn/CN/10.19976/j.cnki.43-1448/TF.2024083 或 http://pmbjb.csu.edu.cn/CN/Y2024/V29/I6/514

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