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学者姓名：符寒光
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摘要 ：
In order to further improve the wear resistance of Hypereutectic High Chromium Cast iron (HHCCI), the effects of different Cu contents on the microstructure and properties of HHCCI were systematically studied. It was found that with the increase of Cu content, the carbide size was refined, and the increase of Cu content led to the increase of austenite and the decrease of hardness in as-cast HHCCI. After heat treatment at 1050 degrees C, the hardness of HHCCI increased significantly compared with as-cast. And with the increase of Cu content, the hardness of HHCCI increased first and then decreased, and the hardness was the highest when 0.5 wt% Cu was added. The increase of copper content promotes the precipitation of secondary carbides and makes the interface between alpha-Fe and M23C6-type secondary carbides a semi-coherent boundary. With the increase of Cu content, the wear loss of HHCCI decreased after heat treatment at 1050 degrees C, and the wear resistance improved. When the Cu content increased to 1.0 wt%, the wear resistance of HHCCI was the best, which was 2.6 times that of copper-free HHCCI. The continued increase of copper content has no obvious effect on the wear resistance of HHCCI. In addition, a small amount of Cu tends to adsorb on the (0001) preferential growth surface of M7C3-type carbides, thereby refining the carbides. From the First-principles calculations, the solid solution strengthening effect of Cu on the matrix and the adsorption and refinement of carbides were revealed, and the influence mechanism on the wear resistance of HHCCI was characterized.
关键词 ：
Carbides Carbides Cu alloying Cu alloying First-principles calculations First-principles calculations Wear resistance Wear resistance Hypereutectic high chromium cast iron Hypereutectic high chromium cast iron
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| GB/T 7714 | Gong, Liqiang , Fu, Hanguang , Zhi, Xiaohui . Microstructure and properties of Cu-bearing hypereutectic high chromium cast iron [J]. | MATERIALS CHARACTERIZATION , 2023 , 195 . |
| MLA | Gong, Liqiang 等. "Microstructure and properties of Cu-bearing hypereutectic high chromium cast iron" . | MATERIALS CHARACTERIZATION 195 (2023) . |
| APA | Gong, Liqiang , Fu, Hanguang , Zhi, Xiaohui . Microstructure and properties of Cu-bearing hypereutectic high chromium cast iron . | MATERIALS CHARACTERIZATION , 2023 , 195 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
In order to solve the problems of low hardness and poor wear resistance of titanium alloy, laser cladding technology was used to prepare Ti(C,B)/Ni coatings with different amount of Cr3C2 on the surface of Ti-6Al-4V titanium alloy. The effects of Cr3C2 content on the microstructure, hardness and wear resistance of Ti(C,B)/Ni coating were investigated by methods of scanning electron microscope (SEM), x-ray diffractometer (XRD), microhardness tester and M-200 wear tester. The results showed that phases existing in coating mainly contain gamma-Ni, Ni3Ti, NiTi, TiB2, Ti(C,B) and CrB. With the increase of Cr3C2 content, the size and number of black bulk precipitates in the coating reduced. Meanwhile, the short rod-like Ti(C,B) particles grew and the amount of the particles increased, and Ti(C,B) particles existed in the form of cellular dendritic crystals in the coating. The average microhardness of the cladding layer without Cr3C2 addition is 896.7 HV0.2, which is about 1.5 times higher than that of Ti-6Al-4V substrate (360 HV0.2). With the increase of Cr3C2 content (10, 20, 30 wt.%), the average microhardness of the coating increased to 948.7, 990.4 and 1035.8 HV0.2, respectively. The average hardness of the coating added 30 wt.%Cr3C2 is 15.5% higher than that of the Cr3C2-free coating. At the same time, the wear resistance increased with the increase of Cr3C2 content.
关键词 ：
wear resistance wear resistance laser cladding laser cladding Cr3C2 addition Cr3C2 addition TiC TiC microstructure microstructure hardness hardness Ti(C,B)/Ni coatings Ti(C,B)/Ni coatings
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| GB/T 7714 | Liang Yunlong , Fu Hanguang , Xing Zhenguo et al. Effect of Cr3C2 Content on Microstructure and Properties of Laser Cladding Ti(C, B)/Ni Coatings [J]. | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2022 , 31 (7) : 5189-5200 . |
| MLA | Liang Yunlong et al. "Effect of Cr3C2 Content on Microstructure and Properties of Laser Cladding Ti(C, B)/Ni Coatings" . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 31 . 7 (2022) : 5189-5200 . |
| APA | Liang Yunlong , Fu Hanguang , Xing Zhenguo , Guo Xingye , Lin Jian . Effect of Cr3C2 Content on Microstructure and Properties of Laser Cladding Ti(C, B)/Ni Coatings . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2022 , 31 (7) , 5189-5200 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
High-entropy alloy (HEA) coatings of AlCoCrFeNi are being investigated as potential wear-resistance materials due to their excellent hardness and wear resistance. In this work, AlCoCrFeNi-based coatings were reinforced by in-situ TiC particles via laser cladding. The microstructure and wear resistance were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), and wear resistance tests. In addition, the hardness of oxidation TiC particles was analyzed by first principles calculations. The results show that the dominant phase of AlCoCrFeNi-based coatings is BCC phase. In-situ TiC particles present a flower-shaped morphology with Al2O3 core. Based on the calculated hardness, the hardness of TiC decreases with the increase of oxygen atoms in TiC. The hardness and wear resistance are improved considerably with the generation of the in-situ TiC particles. The AlCoCrFeNi-20% TiC coating exhibits the best wear resistance with an average hardness of 684.4 HV0.3, and the main wear mechanism is abrasive wear.
关键词 ：
In-situ TiC In-situ TiC Microstructure Microstructure Wear Resistance Wear Resistance High Entropy Alloy High Entropy Alloy Laser Cladding Laser Cladding
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| GB/T 7714 | Li Yutao , Wang Kaiming , Fu Hanguang et al. Microstructure and wear resistance of in-situ TiC reinforced AlCoCrFeNi-based coatings by laser cladding [J]. | APPLIED SURFACE SCIENCE , 2022 , 585 . |
| MLA | Li Yutao et al. "Microstructure and wear resistance of in-situ TiC reinforced AlCoCrFeNi-based coatings by laser cladding" . | APPLIED SURFACE SCIENCE 585 (2022) . |
| APA | Li Yutao , Wang Kaiming , Fu Hanguang , Guo Xingye , Lin Jian . Microstructure and wear resistance of in-situ TiC reinforced AlCoCrFeNi-based coatings by laser cladding . | APPLIED SURFACE SCIENCE , 2022 , 585 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
AlCoCrFeNi has excellent mechanical properties, however, its hardness and wear resistance are insufficient for engineering applications. In order to improve the wear resistance of AlCoCrFeNi coating, WC and in-situ TiC particles were used in this work. Subsequently, the microstructure, hardness, and wear resistance were studied in detail. The results showed that the in-situ TiC particles were uniformly distributed in the whole coating, ameliorating the uneven distribution of WC particles. A sound interface was formed between the particles and the coating matrix, proving the composite coating with excellent performance in wear resistance. The phase constituents of the coating matrix were the BCC and B2 phases. And BCC phase occurred lattice distortion due to the dissolution of W atoms, resulting in the solid solution strengthening of coating matrix. Furthermore, with the increase of WC content, a needle W-rich BCC phase appeared in the coating matrix. Finally, the hardness of AlCoCrFeNi-WC/TiC coatings increased from 516.4 HV0.3 to 808.7 HV0.3, and the wear resistance was increased by 14 times. The improvement in hardness can be attributed to the WC particles, in-situ TiC particles, and solid solution strengthening.
关键词 ：
High entropy alloy High entropy alloy Laser cladding Laser cladding WC particles WC particles Microstructure Microstructure Wear resistance Wear resistance
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| GB/T 7714 | Li, Yutao , Fu, Hanguang , Ma, Tiejun et al. Microstructure and wear resistance of AlCoCrFeNi-WC/TiC composite coating by laser cladding [J]. | MATERIALS CHARACTERIZATION , 2022 , 194 . |
| MLA | Li, Yutao et al. "Microstructure and wear resistance of AlCoCrFeNi-WC/TiC composite coating by laser cladding" . | MATERIALS CHARACTERIZATION 194 (2022) . |
| APA | Li, Yutao , Fu, Hanguang , Ma, Tiejun , Wang, Kaiming , Yang, Xiaojun , Lin, Jian . Microstructure and wear resistance of AlCoCrFeNi-WC/TiC composite coating by laser cladding . | MATERIALS CHARACTERIZATION , 2022 , 194 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
为了解决复杂工业过程中的概念漂移问题,提高集成学习模型的泛化性能,在保证集成学习模型精度的基础上,提出了一种用于优化多样性的基学习器在线动态选择集成建模方法.该方法以在线极限学习机作为基学习器,按照基学习器在滑动窗口上的分类精度对其进行逆序排序,将基学习器在滑动窗口上的其他性能指标作为特征属性,依次利用近似线性依靠条件挑选出准确且多样的基学习器用于集成输出,提高了集成学习模型在处理概念漂移数据流时的分类精度.最后,使用合成数据集和公开数据集验证了所提算法的合理性与有效性.
关键词 ：
准确性 准确性 近似线性依靠 近似线性依靠 在线极限学习机 在线极限学习机 概念漂移 概念漂移 集成学习 集成学习 多样性 多样性
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| GB/T 7714 | 陈双叶 , 赵荣 , 符寒光 et al. 基于准确性和多样性的在线动态选择集成建模方法 [J]. | 北京工业大学学报 , 2021 , 47 (11) : 1211-1218 . |
| MLA | 陈双叶 et al. "基于准确性和多样性的在线动态选择集成建模方法" . | 北京工业大学学报 47 . 11 (2021) : 1211-1218 . |
| APA | 陈双叶 , 赵荣 , 符寒光 , 高建琛 . 基于准确性和多样性的在线动态选择集成建模方法 . | 北京工业大学学报 , 2021 , 47 (11) , 1211-1218 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
激光熔覆原位合成(Ti,Nb)C强化Ni45涂层的微观组织与耐磨性研究
关键词 ：
耐磨性 耐磨性 显微组织 显微组织 镍基涂层 镍基涂层 激光熔覆 激光熔覆 原位合成(Ti,Nb)C 原位合成(Ti,Nb)C
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| GB/T 7714 | 李来来 , 金头男 , 符寒光 et al. 激光熔覆原位合成(Ti,Nb)C强化Ni45涂层的微观组织与耐磨性研究 [J]. | 李来来 , 2021 , 50 (8) : 81-85,91 . |
| MLA | 李来来 et al. "激光熔覆原位合成(Ti,Nb)C强化Ni45涂层的微观组织与耐磨性研究" . | 李来来 50 . 8 (2021) : 81-85,91 . |
| APA | 李来来 , 金头男 , 符寒光 , 孙淑婷 , 热加工工艺 . 激光熔覆原位合成(Ti,Nb)C强化Ni45涂层的微观组织与耐磨性研究 . | 李来来 , 2021 , 50 (8) , 81-85,91 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
集成学习相较于单模型具有更好的预测精度和泛化能力,被广泛应用于工业过程的质量预测.基学习器之间的多样性和基学习器的准确性对集成的泛化能力影响极大.为了进一步提高集成模型的泛化能力,提出一种同时考虑准确性和差异性的选择性集成建模方法.以在线极限学习机作为基学习器,将基学习器的准确性和基学习器对集成模型多样性的贡献率作为博弈双方,利用博弈论原理求解得出使集成模型准确性和多样性都达到最优的选择方案,使集成模型的准确性和多样性兼优;模型预测完成后,综合当前误差和历史记录误差对基学习器的权重进行在线更新,实现在线测量阶段对建模对象特性的动态自适应.最后,使用公开数据集和实际工业数据验证了所提算法的合理性...
关键词 ：
软测量模型 软测量模型 概念漂移 概念漂移 选择性集成 选择性集成 博弈论 博弈论 在线极限学习机 在线极限学习机 自适应学习 自适应学习
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| GB/T 7714 | 陈双叶 , 高建琛 , 符寒光 et al. 基于博弈论准确性和差异性兼优的选择性集成建模方法及其应用 [J]. | 北京工业大学学报 , 2021 , 47 (01) : 32-39 . |
| MLA | 陈双叶 et al. "基于博弈论准确性和差异性兼优的选择性集成建模方法及其应用" . | 北京工业大学学报 47 . 01 (2021) : 32-39 . |
| APA | 陈双叶 , 高建琛 , 符寒光 , 赵荣 . 基于博弈论准确性和差异性兼优的选择性集成建模方法及其应用 . | 北京工业大学学报 , 2021 , 47 (01) , 32-39 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
过共晶高铬铸铁是一种优良的耐磨材料,广泛应用于渣浆泵过流件的生产。随着过共晶高铬铸铁中含碳量的不断增加,其组织中的初生碳化物变得粗大,在承受高冲击力或大颗粒冲击下会出现开裂的情况。为了改善过共晶高铬铸铁的韧性,提高其综合性能,国内外许多学者在细化碳化物领域做了大量的研究,文中总结了过共晶高铬铸铁中碳化物的细化最新研究成果,主要包括变质和孕育、半固态处理、脉冲电流三种方法。结合当前情况,展望了未来过共晶高铬铸铁中碳化物细化的研究发展前景。
关键词 ：
过共晶高铬铸铁 过共晶高铬铸铁 变质和孕育 变质和孕育 脉冲电流 脉冲电流 半固态处理 半固态处理 碳化物细化 碳化物细化
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| GB/T 7714 | 郭强 , 符寒光 . 过共晶高铬铸铁中碳化物细化研究进展 [J]. | 铸造 , 2021 , 70 (04) : 401-408 . |
| MLA | 郭强 et al. "过共晶高铬铸铁中碳化物细化研究进展" . | 铸造 70 . 04 (2021) : 401-408 . |
| APA | 郭强 , 符寒光 . 过共晶高铬铸铁中碳化物细化研究进展 . | 铸造 , 2021 , 70 (04) , 401-408 . |
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摘要 ：
为了解决复杂工业过程的概念漂移问题,提高集成学习模型的泛化性能,基于分组遗传算法,提出一种用于提升基学习器间多样性的建模方法.该方法以在线极限学习机作为基学习器,根据基学习器在滑动窗口上的性能对其进行分组,并执行进化操作,同时引入基因流概念,增加了基学习器间的多样性,提高了集成算法在处理概念漂移数据流时的预测性能.最后使用合成数据集和真实数据集验证了所提算法的合理性与有效性.
引用：
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| GB/T 7714 | 陈双叶 , 赵荣 , 符寒光 . 基于分组遗传算法的集成多样性增强及其应用 [J]. | 北京工业大学学报 , 2021 , 47 (8) : 886-894 . |
| MLA | 陈双叶 et al. "基于分组遗传算法的集成多样性增强及其应用" . | 北京工业大学学报 47 . 8 (2021) : 886-894 . |
| APA | 陈双叶 , 赵荣 , 符寒光 . 基于分组遗传算法的集成多样性增强及其应用 . | 北京工业大学学报 , 2021 , 47 (8) , 886-894 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
一种抗擦伤的铁基堆焊材料及其制备方法属于表面工程领域，所述的堆焊材料以药芯焊丝方式制备，药芯原料包括：碳化铬粉末、氮化铬粉末、电解锰粉、硅粉、还原铁粉、镍粉、铬粉、铌粉和钼粉；各元素成分范围如下：Cr : 22‑25wt.％；Ni : 4‑7.5wt.％；C : 1.0‑1.2wt％；N : 0.1‑0.4wt.％；Mn : 4‑5wt.％；Si : 3.3‑3.5wt.％；Mo : 1‑2wt.％；Nb : 0.6‑0.8wt.％和Fe余量。本发明一方面在堆焊材料中添加与氮化学亲和力较大的元素，如Cr, Mn, V, Nb增加氮化物的含量，另外一方面等离子堆焊气氛中通入氮气，减少堆焊过程中氮的损失，增加氮在堆焊层中的溶解量，最终得到了低镍的奥氏体堆焊层，由于氮含量的增加使得堆焊层抗擦伤性能有明显的提高。
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| GB/T 7714 | 李辉 , 王梦宇 , 郭许航 et al. 一种抗擦伤的铁基堆焊材料及其制备方法 : CN202110133655.6[P]. | 2021-02-01 . |
| MLA | 李辉 et al. "一种抗擦伤的铁基堆焊材料及其制备方法" : CN202110133655.6. | 2021-02-01 . |
| APA | 李辉 , 王梦宇 , 郭许航 , 林健 , 符寒光 . 一种抗擦伤的铁基堆焊材料及其制备方法 : CN202110133655.6. | 2021-02-01 . |
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