不同基体对HVOF沉积NiCoCrAlY涂层硬度性能的影响

IF 0.6 Q4 METALLURGY & METALLURGICAL ENGINEERING Metalurgija Pub Date : 2017-09-30 DOI:10.14203/METALURGI.V32I2.309
R. D. Desiati, E. Sugiarti, E. Junianto, E. Martides, Budi Prawara
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According to micro structural analysis, it reveald that the thickness of NiCoCrAlYcoating layer was about  370.76 m m, 92 m m, dan 29 on carbon steel, nickel chrome and hastealloy substrate, respectively. Surface morfology showed that the coated layer was not flat and porous structure or void on the coated layer. The porosity of the coated layer might effect the mechanical properties of the sample where high procentase of porosity might reduce the hardness of the sample. The hardness of NiCoCrAlY coating was about 349.95 , 315.60 and  311.30 HV for carbon steel, nickel chrome and hastealloy substrate, respectively. The distance from  interface between coating layer and substrate might effect  hardness measurement  where closer to interface could decrease hardness value and it might caused  by interdiffusion of coating elements thus effect to its mechanical properties. 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Morfologi permukaan lapisan menunjukkan bahwa lapisan yang terdeposisi tidak begitu rata dan masih tampak adanya pori atau lubang di area lapisan NiCoCrAlY yang terbentuk. Porositas dari lapisan sangat berpengaruh pada sifat mekanik, semakin tinggi persentase porositas lapisan maka kekerasan akan menurun.  Nilai kekerasan lapisan NiCoCrAlY pada substrat baja karbon adalah sebesar 349,95 HV, nikel krom sebesar 315,60 HV dan hastealloy sebesar 311,30 HV. Jarak dengan interface mempengaruhi pengukuran kekerasan. Semakin dekat dengan interface akan semakin menurun nilai kekerasaannya. 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引用次数: 0

摘要

对沉积在不同基体(碳钢、镍铬合金和哈氏合金)上的NiCoCrAl涂层样品进行了微观结构和显微硬度表征。采用高速氧燃料(HVOF)热喷涂技术沉积了NiCoCrAlY涂层。对所有横截面样品进行了表征和测量。显微结构分析采用40倍放大的光学显微镜进行表征。此外,使用显微硬度计在300gf下测量样品的硬度13秒。通过计算涂层前、涂层后和NiCoCrAl涂层上基体上硬度测量的3个位置的平均值来测量硬度数据。微观结构分析表明,在碳钢、镍铬合金和哈氏合金基体上,NiCoCrAlY涂层的厚度分别为370.76m、92m和29nm。表面形貌表明涂层不平整,涂层上存在多孔结构或孔隙。涂层的孔隙率可能影响样品的机械性能,其中高百分比的孔隙率可能降低样品的硬度。对于碳钢、镍铬合金和哈氏合金基体,NiCoCrAlY涂层的硬度分别为349.95、315.60和311.30 HV。涂层和基底之间距离[UNK]界面的距离可能影响[UNK]硬度测量[UNK],其中更靠近界面可能降低硬度值,并且可能通过涂层元素的相互扩散导致[UNK]从而影响其机械性能。摘要研究了在碳钢、铬镍合金和哈氏合金等不同基体上沉积的NiCoCrAlY层的微观结构特征和微观硬度。使用高速氧燃料技术沉积NiCoCrAlY层。表征和测量过程在整个水平排列层上进行。使用40x尺寸的光学显微镜观察结构微观特征。接下来,测量使用微暴力的暴力,负荷为300 gf,持续13秒。暴力测试数据是通过测量过滤前、过滤后和分层NiCoCrAlY后基板各部分上3个暴力测试位置的平均值而获得的。基于微观结构特征的结果,已知NiCoCrAlY层成功地以370,76mm、92mm和115,73mm的密度定位在碳钢基底、铬镍和哈氏合金上方。该层的表面形态表明该层不是那么平坦,并且在NiCoCrAlY层区域中看起来仍然具有形成的孔或空穴。层的孔隙率影响力学性质,层的孔隙率百分比越高,暴力就会降低。[UNK]NiCoCrAlY在碳钢基体上的层暴力值为349,95 HV、铬镍315,60 HV和哈氏合金311,30 HV。与界面的距离影响暴力测量。界面越近,暴力就越少。它受到层元素界面的影响,因此影响其机械强度。
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Pengaruh Substrat Terhadap Kekerasan Lapisan NiCoCrAlY Yang Terdeposisi Dengan Teknik HVOF[Effect of Different Substrate on Hardness Properties of NiCoCrAlY Coatings Deposited by HVOF Technique]
Micro structure and micro hardness characterizations have been done on NiCoCrAl coating sample deposited on different substrate, i..e, carbon steel, nickel chrome and hastealloy. NiCoCrAlY coating was deposited by high velocity oxy fuel (HVOF) thermal spraying technique. Characterization and measurents were applied on all cross section samples. Micro structural analysis was characterized by optical microscope with 40x magnification. Moreover, micro hardness tester was utilized to measure the hardness of the sample with 300 gf for 13 second. The hardness data was measure by calculating the average of 3 position of hardness measurement on substrate before coating, after coating and NiCoCrAl coating layer. According to micro structural analysis, it reveald that the thickness of NiCoCrAlYcoating layer was about  370.76 m m, 92 m m, dan 29 on carbon steel, nickel chrome and hastealloy substrate, respectively. Surface morfology showed that the coated layer was not flat and porous structure or void on the coated layer. The porosity of the coated layer might effect the mechanical properties of the sample where high procentase of porosity might reduce the hardness of the sample. The hardness of NiCoCrAlY coating was about 349.95 , 315.60 and  311.30 HV for carbon steel, nickel chrome and hastealloy substrate, respectively. The distance from  interface between coating layer and substrate might effect  hardness measurement  where closer to interface could decrease hardness value and it might caused  by interdiffusion of coating elements thus effect to its mechanical properties. Abstrak Telah dilakukan karakterisasi strukturmikro dan kekerasan mikro pada lapisan NiCoCrAlY yang dideposisikan di atas substrat yang berbeda yaitu baja karbon, nikel krom dan hastealloy. Lapisan NiCoCrAlY dideposisikan menggunakan teknik penyemprotan HVOF ( high velocity oxy fuel ) . Proses karakterisasi dan pengukuran dilakukan pada seluruh lapisan dengan irisan melintang. Karakterisasi strukturmikro diamati dengan menggunakan mikroskop optik dengan perbesaran 40x. Selanjutnya untuk pengukuran kekerasan menggunakan kekerasan mikro dengan beban 300 gf selama 13 detik. Data pengujian kekerasan diperoleh dengan mengukur nilai rata-rata dari 3 posisi uji kekerasan pada masing-masing bagian substrat sebelum dilapisi, setelah dilapisi dan lapisan NiCoCrAlY. Berdasarkan hasil karakterisasi strukturmikro diketahui bahwa lapisan NiCoCrAlY berhasil terdeposisi dengan ketebalan 370,76 mm, 92 mm, dan 115,73 mm masing-masing di atas substrat baja karbon, nikel krom dan hastealloy. Morfologi permukaan lapisan menunjukkan bahwa lapisan yang terdeposisi tidak begitu rata dan masih tampak adanya pori atau lubang di area lapisan NiCoCrAlY yang terbentuk. Porositas dari lapisan sangat berpengaruh pada sifat mekanik, semakin tinggi persentase porositas lapisan maka kekerasan akan menurun.  Nilai kekerasan lapisan NiCoCrAlY pada substrat baja karbon adalah sebesar 349,95 HV, nikel krom sebesar 315,60 HV dan hastealloy sebesar 311,30 HV. Jarak dengan interface mempengaruhi pengukuran kekerasan. Semakin dekat dengan interface akan semakin menurun nilai kekerasaannya. Hal ini dipengaruhi oleh daerah interdifusi elemen pelapis sehingga mempengaruhi kekuatan mekaniknya.
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来源期刊
Metalurgija
Metalurgija 工程技术-冶金工程
CiteScore
1.20
自引率
33.30%
发文量
64
审稿时长
4-8 weeks
期刊介绍: The journal Metalurgija is primary scientific periodical that publishes scientific papers (original papers, preliminary notes, reviewed papers) as well as professional papers from the area of basic, applicable and developing researching in metallurgy and boundary metallurgy areas (physics, chemistry, mechanical engineering). These papers relate to processing ferrous and non-ferrous metallurgy, treating investigating as well as testing of raw materials, semi products and products, especially in the area of improving new materials and possibilities of their implementation. The journal is the only national periodical of this kind in the Republic of Croatia and covers the scientific field of metallurgy, especially: physical metallurgy and materials; process metailurgy, (ferrous and non-ferrous); mechanical metallurgy (processing, power , etc.); related (adjoing) branches: mechanlcal engineering, chemistry, physics etc.
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