董天顺,李小兵,李国禄,王海斗,刘明,周秀锴.重熔对 NiCrBSi 涂层组织及高温耐磨性能的影响[J].表面技术,2018,47(8):105-112.
DONG Tian-shun,LI Xiao-bing,LI Guo-lu,WANG Hai-dou,LIU Ming,ZHOU Xiu-kai.Effect of Remelting on Microstructure and High Temperature Wear Resistance of NiCrBSi Coating[J].Surface Technology,2018,47(8):105-112 |
| 重熔对 NiCrBSi 涂层组织及高温耐磨性能的影响 |
| Effect of Remelting on Microstructure and High Temperature Wear Resistance of NiCrBSi Coating |
| 投稿时间：2018-01-16 修订日期：2018-08-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.08.016 |
| 中文关键词: NiCrBSi 涂层 氩弧重熔 组织 力学性能 高温耐磨性能 |
| 英文关键词:NiCrBSi coating argon arc remelting microstructure mechanical property high temperature wear resistances |
| 基金项目:国家自然科学基金（51675158，51535011）；河北省自然科学基金（E2016202325）；973 计划（61328304） |
| 作者 | 单位 |
| 董天顺 | 河北工业大学 材料科学与工程学院，天津 300130 |
| 李小兵 | 河北工业大学 材料科学与工程学院，天津 300130 |
| 李国禄 | 河北工业大学 材料科学与工程学院，天津 300130 |
| 王海斗 | 陆军装甲兵学院 装备再制造技术国防科技重点实验室，北京 100072 |
| 刘明 | 陆军装甲兵学院 装备再制造技术国防科技重点实验室，北京 100072 |
| 周秀锴 | 河北工业大学 材料科学与工程学院，天津 300130 |
|
| Author | Institution |
| DONG Tian-shun | School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China |
| LI Xiao-bing | School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China |
| LI Guo-lu | School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China |
| WANG Hai-dou | National Key Lab for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072, China |
| LIU Ming | National Key Lab for Remanufacturing, Academy of Armored Forces Engineering, Beijing 100072, China |
| ZHOU Xiu-kai | School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China |
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| 中文摘要: |
| 目的 改善 NiCrBSi 涂层的组织及高温耐磨性能。方法 采用等离子喷涂在 45 号钢基体上制备 NiCrBSi 涂层，并用氩弧对其进行重熔处理。利用扫描电子显微镜、能谱仪和 X 射线衍射仪对喷涂层与重熔层的形貌、微观组织、成分与物相进行分析。采用显微硬度仪与纳米压痕仪测试涂层的硬度、弹性模量，并计算出涂层的断裂韧性。通过室温、300 ℃、500 ℃的摩擦磨损试验评价和比较喷涂层与重熔层的耐磨性能。结果 重熔层各元素分布较均匀，主要由 γ-(Fe,Ni)、Cr2B、Mn5Si2和 α-Fe 等物相组成。重熔层由喷涂层的层状结构转变为致密的铸态组织，孔隙率由 7.2%降低至 0.4%，重熔层与基体之间形成了冶金结合。涂层重熔后硬度由 724HV 降低至 608HV，但是弹性模量与断裂韧性分别由 161.15 GPa 和 0.63 MPa•m1/2提高至 195.92 GPa 和 7.18 MPa•m1/2。结论 重熔处理改善了涂层的组织，使得重熔层在室温、300 ℃、500 ℃的耐磨性能均优于喷涂层。随着温度的升高，喷涂层氧化脱落越来越严重，而重熔层无明显氧化脱落。 |
| 英文摘要: |
| The work aims to improve microstructure and high temperature wear resistance of NiCrBSi coating. NiCrBSi coating was prepared on 45# steel by plasma spraying, then the coating was remelted by argon arc. Morphology, microstructure, composition and phase of sprayed coating and remelted coating were analyzed by scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X ray diffractometer (XRD). Hardness and elastic modulus of the coating were tested by microhardness tester and nano-indentor, and fracture toughness of the coating was calculated. Wear resistance of the sprayed coating and remelted coating was evaluated and compared by performing friction-wear test at room temperature, 300 ℃ and 500 ℃. Various elements of the remelted coating were uniformly distributed, and phase mainly consisted of γ-(Fe,Ni), Cr2B, Mn5Si2 andα-Fe. Structure of the remelted coating transformed from layered structure of sprayed coating to compact cast structure, and porosity was reduced from 7.2% to 0.4%. Metallurgical bonding was formed between remelted coating and substrate. Hardness of the coating was reduced from 724HV to 608HV after remelting, while the elastic modulus of remelted coating was increased from 161.15 GPa to 195.92 GPa, and fracture toughness was increased from 0.63 MPa•m1/2 to 7.18 MPa•m1/2. Remelting treatment improves microstructure of the coating, wear resistance of the remelted coating is better than that of sprayed coating at room temperature, 300 ℃ and 500 ℃. Both oxidation and spalling of sprayed coating are increasingly severe with the increase of temperature, while the remelted coating is not subject to obvious oxidation and spalling. |
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