| Microstructure and Wear Resistance Evolution of HVOF-Sprayed WC-(W,Cr)(2)C-Ni Coating with Post Heat Treatment In Air Atmosphere | |
| Department | 先进润滑与防护材料研究发展中心 |
Hou GL(侯国梁)1,2 ; Zhou HD(周惠娣)1; An YL(安宇龙)1,2; Liu G(刘光)1,2; Chen JM(陈建敏)1; Chen J(陈杰)1,2; Zhou HD(周惠娣)
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| The second department | 固体润滑国家重点实验室 |
| 2012 | |
| Source Publication | Rare Metal Materials and Engineering
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| ISSN | 1002-185X |
| Volume | 41Issue:增刊:1Pages:388-393 |
| Abstract | WC-(W,Cr)(2)C-Ni coating was prepared on 1Cr18Ni9Ti stainless steel and C-276 Ni-base Hastelloy by high velocity oxy-fuel (HVOF) spraying. The effect of post heat treatment in air atmosphere on the microstructure, phase composition, micro-hardness, fracture toughness, and wear resistance of HVOF-sprayed WC-(W,Cr)(2)C-Ni coating was investigated. The microstructure and phase composition of the coatings were analyzed by means of field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD). The microhardness and fracture toughness of the coatings were measured using a microhardness tester and a Vickers hardness tester. Moreover, dry friction and wear behavior of the coatings sliding against Si3N4 ball was investigated using an oscillating friction and wear tester; and the worn surfaces of the coatings were analyzed by means of scanning electron microscopy (SEM). It was found that heat treatment within 500-800 degrees C resulted in crystallization of amorphous phase in as-sprayed coating, generating nanoscale new phases such as NiWO4, CrWO4 and Cr2WO6. Besides, heat treatment led to increase of the microhardness of as-sprayed coating, and the highest microhardness was obtained after heat treatment at 800 degrees C. The fracture toughness and wear resistance of the as-sprayed coating increased with increasing heat treatment temperature up to 700 degrees C but tended to decrease with further elevating temperature. In other words, the mechanical properties and wear resistance of the as-sprayed coatings were worsened owing to excessive growth of oxidation grains and depletion of ductile Ni binder after heat treatment above 700 degrees C. Thus it was suggested that as-sprayed ceramic composite coating should be post heat treated in air at a moderate temperature of 700 degrees C so as to achieve the optimized mechanical properties and wear resistance. |
| Keyword | Hvof Post Heat Treatment Wc-(w Microstructure Cr)(2)C-ni Coating Wear Resistance |
| Subject Area | 材料科学与物理化学 |
| Funding Organization | Innovative Group Foundation from National Natural Science Foundations of China (50421502);National “973” Project (2007CB607601) |
| Indexed By | SCI |
| If | 0.160 |
| Language | 英语 |
| Funding Project | 磨损和表面工程组 |
| compositor | 第一作者单位 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/3445 |
| Collection | 固体润滑国家重点实验室（LSL） 中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心 |
| Corresponding Author | Zhou HD(周惠娣) |
| Affiliation | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Hou GL,Zhou HD,An YL,et al. Microstructure and Wear Resistance Evolution of HVOF-Sprayed WC-(W,Cr)(2)C-Ni Coating with Post Heat Treatment In Air Atmosphere[J]. Rare Metal Materials and Engineering,2012,41(增刊:1):388-393. |
| APA | Hou GL.,Zhou HD.,An YL.,Liu G.,Chen JM.,...&周惠娣.(2012).Microstructure and Wear Resistance Evolution of HVOF-Sprayed WC-(W,Cr)(2)C-Ni Coating with Post Heat Treatment In Air Atmosphere.Rare Metal Materials and Engineering,41(增刊:1),388-393. |
| MLA | Hou GL,et al."Microstructure and Wear Resistance Evolution of HVOF-Sprayed WC-(W,Cr)(2)C-Ni Coating with Post Heat Treatment In Air Atmosphere".Rare Metal Materials and Engineering 41.增刊:1(2012):388-393. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 388-393.PDF（1186KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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