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学者姓名：符寒光
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Abstract ：
The microstructure and mechanical properties of three kinds of low-carbon medium-manganese steels with different Si contents under an intercritical heat treatment process were studied. The results show that the microstructure of the test forged steel is mainly composed of ferrite and pearlite. After 900 degrees C complete austenitizing quenching + 720 degrees C intercritical quenching, the microstructure of the test steel is mainly composed of ferrite and martensite. With the increase in Si content, the microstructure becomes finer and more uniform. The microstructure of the test steel after 900 degrees C complete austenitizing quenching + 720 degrees C intercritical quenching + 680 degrees C intercritical tempering is dominated by ferrite and tempered martensite, with a small amount of retained austenite and cementite. As the Si content increases, the boundaries between ferrite and tempered martensite become more clear. The tensile strength and hardness of the test steel increase with the increase in Si content, while the elongation first increases and then decreases; the comprehensive performance of the test steel is the best when the Si content is 0.685 wt. %, with a tensile strength of 726 MPa, a yield ratio of only 0.65, the highest elongation of 30.5%, and the highest strong plastic product of 22,143 MPa.%.
Keyword ：
mechanical properties mechanical properties microstructure microstructure intercritical heat treatment intercritical heat treatment Si content Si content low-carbon medium-manganese steel low-carbon medium-manganese steel
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| GB/T 7714 | Hu, Zihan , Fu, Hanguang . Effect of Si Content on Microstructure and Properties of Low-Carbon Medium-Manganese Steel after Intercritical Heat Treatment [J]. | METALS , 2024 , 14 (6) . |
| MLA | Hu, Zihan 等. "Effect of Si Content on Microstructure and Properties of Low-Carbon Medium-Manganese Steel after Intercritical Heat Treatment" . | METALS 14 . 6 (2024) . |
| APA | Hu, Zihan , Fu, Hanguang . Effect of Si Content on Microstructure and Properties of Low-Carbon Medium-Manganese Steel after Intercritical Heat Treatment . | METALS , 2024 , 14 (6) . |
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Abstract ：
This article investigates the change rule of the microstructure, hardness and wear resistance of high boron steel containing 0.1 wt.% to 0.5 wt.% boron in the cast state and after quenching at different temperatures. The results show that the microstructure of cast high boron steel with different contents of boron is composed of pearlite, ferrite and eutectic boride, which has lower hardness and wear resistance, and the higher the content of boron, the higher the hardness and the better the wear resistance. After quenching at 900-1,000 degrees C, pearlite and ferrite change into a large number of lamellar martensite and a small amount of lath martensite. After high-temperature quenching at 1,050 degrees C, retained austenite appears in the microstructure in addition to martensite, and borides are partially dissolved. The hardness and wear resistance are significantly improved compared to the as-cast high boron steel. As the quenching temperature increases, the dissolution of boride is obvious, the hardness and wear resistance are firstly increased and then decreased. When the content of boron is 0.5 wt.% and the quenching temperature is 1,000 degrees C, the hardness reaches a maximum value of 59.0 HRC, and the abrasion resistance is the best.
Keyword ：
microstructure microstructure wear resistance wear resistance quenching temperature quenching temperature high boron steel high boron steel hardness hardness
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| GB/T 7714 | Wang, Han , Fu, Hanguang . Effect of boron content and quenching temperature on the microstructure and wear resistance of high boron steel [J]. | MATERIALS TESTING , 2024 . |
| MLA | Wang, Han 等. "Effect of boron content and quenching temperature on the microstructure and wear resistance of high boron steel" . | MATERIALS TESTING (2024) . |
| APA | Wang, Han , Fu, Hanguang . Effect of boron content and quenching temperature on the microstructure and wear resistance of high boron steel . | MATERIALS TESTING , 2024 . |
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Abstract ：
As a novel type of metal material emerging in recent years, high-entropy alloy boasts properties such as a simplified microstructure, high strength, high hardness and wear resistance. High-entropy alloys can use laser cladding to produce coatings that exhibit excellent metallurgical bonding with the substrate, thereby significantly improvement of the wear resistance of the material surface. In this paper, the research progress on improving the high-temperature wear resistance of high entropy alloy coatings (LC-HEACs) was mainly analyzed based on the effect of some added alloying elements and the presence of hard ceramic phases. Building on this foundation, the study primarily examines the impact of adding elements such as aluminum, titanium, copper, silicon, and molybdenum, along with hard ceramic particles like TiC, WC, and NbC, on the phase structure of coatings, high-temperature mechanisms, and the synergistic interactions between these elements. Additionally, it explores the potential of promising lubricating particles and introduces an innovative, highly efficient additive manufacturing technology known as extreme high-speed laser metal deposition (EHLMD). Finally, this paper summarizes the main difficulties involved in increasing the high-temperature wear resistance of LC-HEACs and some problems worthy of attention in the future development.
Keyword ：
hard ceramic phase hard ceramic phase high-temperature wear resistance high-temperature wear resistance alloying element alloying element laser cladding laser cladding high-entropy alloy coatings high-entropy alloy coatings
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| GB/T 7714 | Han, Yantao , Fu, Hanguang . Improvement of High Temperature Wear Resistance of Laser-Cladding High-Entropy Alloy Coatings: A Review [J]. | METALS , 2024 , 14 (9) . |
| MLA | Han, Yantao 等. "Improvement of High Temperature Wear Resistance of Laser-Cladding High-Entropy Alloy Coatings: A Review" . | METALS 14 . 9 (2024) . |
| APA | Han, Yantao , Fu, Hanguang . Improvement of High Temperature Wear Resistance of Laser-Cladding High-Entropy Alloy Coatings: A Review . | METALS , 2024 , 14 (9) . |
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Abstract ：
In this study, Ni-based composite coatings with (Cr, V) B-2 ceramic particles were reinforced using varying Y2O3 concentrations for crack-free layers on 40CrNiMo steel surfaces. We investigated the phase composition, microstructure, microhardness, wear resistance, fracture toughness, and the reinforcement mechanism of Y2O3 within the composite cladding. Using SEM and TEM, we revealed the pivotal role of rare earth oxide Y2O3 in refining grains and forming uniform, densely-packed microstructures in the coatings. The resulting cladding layer mainly consisted of fine, strip-like precipitates of the gamma-Ni phase, along with ceramic reinforcement particles like CrB2, VC, and VB2. Unmelted Y2O3 and preferentially nucleated VC served as nucleation sites for (Cr, V) B-2 particles, contributing to the overall structural integrity. Our findings showed that an optimal quantity of Y2O3 moderately increased the hardness to a maximum of 1049.4 HV0.2. Additionally, with increased Y2O3 content, the cladding layer exhibited enhanced wear resistance, improved fracture toughness, and reduced susceptibility to cracking due to complete plastic deformation. However, excessive Y2O3 addition led to a decline in wear resistance, emphasizing the importance of carefully controlling Y2O3 content for optimal coating performance. These results highlight the potential for Y2O3 to enhance Ni-based (Cr, V) B-2 ceramic particle composite coatings, positioning them as promising candidates for advanced surface enhancement applications in materials science and engineering.
Keyword ：
ceramic hard phase ceramic hard phase laser cladding laser cladding nickel-based composite coating nickel-based composite coating wear resistance wear resistance Y2O3 addition Y2O3 addition in-situ synthesized in-situ synthesized
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| GB/T 7714 | Sun, Ze , Liu, Guixin , Fu, Hanguang . Effect of Y2O3 Addition on Microstructure and Properties of In Situ Ceramic Particle-Reinforced Nickel Matrix Composite Coatings [J]. | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2024 . |
| MLA | Sun, Ze 等. "Effect of Y2O3 Addition on Microstructure and Properties of In Situ Ceramic Particle-Reinforced Nickel Matrix Composite Coatings" . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE (2024) . |
| APA | Sun, Ze , Liu, Guixin , Fu, Hanguang . Effect of Y2O3 Addition on Microstructure and Properties of In Situ Ceramic Particle-Reinforced Nickel Matrix Composite Coatings . | JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE , 2024 . |
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Abstract ：
This article investigates the effect of N content on the microstructure, mechanical properties and wear resistance of hypereutectic high chromium cast iron (HHCCI). With the increase of N content, the primary carbides are obviously refined, the austenite content increases, and the dispersed granular Cr2N precipitates. After quenching at 1000 degrees C, secondary carbides are precipitated from the matrix, the matrix transforms into martensite + retained austenite. With the increase of N content, the corrosion resistance of HHCCI increases, and 0.3 wt.% N HHCCI shows the best corrosion resistance. With the increase of N content, the wear resistance of HHCCI increases. The wear resistance of HHCCI with 0.15 wt.% N is the best, which is 1.57 times that of HHCCI without N.
Keyword ：
microstructure microstructure mechanical properties mechanical properties wear resistance wear resistance Hypereutectic high chromium cast iron Hypereutectic high chromium cast iron N content N content
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| GB/T 7714 | Liu, Yawei , Gong, Liqiang , Dong, Minqi et al. Microstructure and properties of hypereutectic high chromium cast iron containing nitrogen [J]. | MATERIALS SCIENCE AND TECHNOLOGY , 2024 , 40 (1) : 26-41 . |
| MLA | Liu, Yawei et al. "Microstructure and properties of hypereutectic high chromium cast iron containing nitrogen" . | MATERIALS SCIENCE AND TECHNOLOGY 40 . 1 (2024) : 26-41 . |
| APA | Liu, Yawei , Gong, Liqiang , Dong, Minqi , Chen, Zhengyang , Jin, Tounan , Yin, Wenhang et al. Microstructure and properties of hypereutectic high chromium cast iron containing nitrogen . | MATERIALS SCIENCE AND TECHNOLOGY , 2024 , 40 (1) , 26-41 . |
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Abstract ：
By employing the first-principles calculations along with SEM, XRD, 3D laser confocal microscopy, and nanoindentation techniques, the structure and properties of additively manufactured NiTi coatings under different atmospheres were investigated. Using an inert atmosphere spraying system, NiTi alloy wires were used instead of NiTi powder to prepare the coatings, reducing the oxygen content from 6.8 wt% in atmospheric NiTi coatings to 2.3 wt% in inert atmosphere NiTi coatings. The NiTi coatings prepared under an inert atmosphere exhibited significantly fewer cracks, defects, and precipitates, with porosity reduced to 0.85+0.11vol%, resulting in a denser coating structure. Cavitation tests revealed that after 120 minutes of cavitation, the cavitation resistance of NiTi coatings prepared in an inert atmosphere (weight loss: 41.2+4.1 mg) was significantly superior to that of coatings prepared in an atmospheric environment (weight loss: 63.7+4.2 mg). The first-principles calculations indicated that the NiTi3 and Ni3Ti phases formed during the spraying process are more stable than other precipitated phases. The NiTi and Ni3Ti phases exhibit lower anisotropy, while the NiTi3 phase shows significant anisotropy. The minor precipitation of NiTi3 and Ni3Ti phases contributes to enhancing the toughness and hardness of the coatings, thereby improving their cavitation resistance potential. The NiTi and NiTi3 phases exhibit certain metallic properties, which can improve electrical conductivity. The Ni3Ti has weaker metallic properties and electrical conductivity, demonstrating superior corrosion resistance.
Keyword ：
First-principles calculations First-principles calculations Additive manufacturing Additive manufacturing Superelasticity Superelasticity Cavitation resistance Cavitation resistance NiTi coatings NiTi coatings
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| GB/T 7714 | Gong, Liqiang , Du, Hejun , Absi, Rafik et al. Study on the microstructure and properties of additively manufactured NiTi coating [J]. | MATERIALS TODAY COMMUNICATIONS , 2024 , 40 . |
| MLA | Gong, Liqiang et al. "Study on the microstructure and properties of additively manufactured NiTi coating" . | MATERIALS TODAY COMMUNICATIONS 40 (2024) . |
| APA | Gong, Liqiang , Du, Hejun , Absi, Rafik , Fu, Hanguang . Study on the microstructure and properties of additively manufactured NiTi coating . | MATERIALS TODAY COMMUNICATIONS , 2024 , 40 . |
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Abstract ：
The effects of different quenching temperatures on the microstructure and properties of 3.3C-20.0Cr-1.0W-0.5B-2.0V-1.8Mo (wt.%) high-chromium cast iron were investigated using an optical microscope, scanning electron microscope, X-ray diffractometer, Rockwell hardness tester, microhardness tester, and wear testing machine. The results show that the microstructure of as-cast multivariate high chromium cast iron mainly consists of eutectic carbides (M7C3), austenite and martensite matrix. In the process of quenching temperature increasing from 950 degrees C to 1150 degrees C, the morphology of massive eutectic carbide (M7C3) did not change. Acicular eutectic carbide (M7C3) appeared to aggregate and grow, and was distributed in the form of blocks or rods. Secondary carbides (M23C6) were precipitated in the matrix. The matrix is transformed from austenite to martensite, with a small amount of residual austenite. The hardness and wear resistance firstly increased and then decreased. The hardness of the 1100 degrees C x 1 h + fog-cooled high-chromium cast iron reaches a peak of 67.0 HRC, and the abrasion resistance increases by 37.0% compared with that of the 950 degrees C x 1 h + fog-cooled specimen.
Keyword ：
quenching heat treatment quenching heat treatment high chromium cast iron high chromium cast iron microstructure microstructure wear resistance wear resistance hardness hardness
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| GB/T 7714 | Li, Siyang , Cheng, Xiaole , Fu, Hanguang . Effect of quenching temperature on microstructure and properties of multivariate high chromium cast iron [J]. | METALLURGICAL RESEARCH & TECHNOLOGY , 2024 , 121 (6) . |
| MLA | Li, Siyang et al. "Effect of quenching temperature on microstructure and properties of multivariate high chromium cast iron" . | METALLURGICAL RESEARCH & TECHNOLOGY 121 . 6 (2024) . |
| APA | Li, Siyang , Cheng, Xiaole , Fu, Hanguang . Effect of quenching temperature on microstructure and properties of multivariate high chromium cast iron . | METALLURGICAL RESEARCH & TECHNOLOGY , 2024 , 121 (6) . |
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Abstract ：
采用扫描电镜(SEM)、透射电镜(TEM)、X射线衍射仪(XRD)、能谱仪(EDS)、显微硬度计和磨损试验机等研究了含钴高钒高速钢经1050℃风冷淬火后在不同温度回火保温不同时间后的组织演变、硬度和耐磨性。结果表明：在不同回火温度下，含钴高钒高速钢中均有MC和M_2C型二次碳化物析出，并在基体中均匀分布。当回火温度为400℃时，含钴高钒高速钢中含有少量残留奥氏体；当回火温度超过500℃,残留奥氏体消失；随着回火温度升高，马氏体发生分解，600℃回火后，孪晶马氏体已完全分解。含钴高钒高速钢经500℃回火后硬度达到峰值，磨损量最小，耐磨性最好，回火温度继续升高后，硬度大幅度下降。在500℃回火时，随着保温时间的延长，含钴高钒高速钢的马氏体分解量增加，保温16 h后，马氏体已完全分解，基体显微硬度明显下降，由于二次碳化物析出的强化效应，导致回火保温时间增加对其宏观硬度无明显影响。
Keyword ：
二次碳化物 二次碳化物 组织演变 组织演变 含钴高钒高速钢 含钴高钒高速钢 回火处理 回火处理 力学性能 力学性能
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| GB/T 7714 | 牛海云 , 潘泳良 , 金头男 et al. 含钴高钒高速钢回火组织演变和耐磨性 [J]. | 材料热处理学报 , 2023 , 44 (08) : 123-132 . |
| MLA | 牛海云 et al. "含钴高钒高速钢回火组织演变和耐磨性" . | 材料热处理学报 44 . 08 (2023) : 123-132 . |
| APA | 牛海云 , 潘泳良 , 金头男 , 袁乃博 , 符寒光 . 含钴高钒高速钢回火组织演变和耐磨性 . | 材料热处理学报 , 2023 , 44 (08) , 123-132 . |
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Abstract ：
Nickel-based coatings obtained by laser melting are broadly applied for surface modification owing to their high bond strength and exceptional wear resistance. Nickel-based laser cladding coatings are also extensively employed in high temperature wear environments. In this paper, the research progress on improving the high temperature wear resistance of laser cladding nickel-based composite coatings was reviewed by introducing a hard ceramic phase, adding solid lubricants and rare earth elements. On this basis, the material system to enhance the high temperature wear resistance of coating was summarized from the perspectives of the type, addition amount, morphology and distribution law of the hard ceramic phase, etc. The synergistic effect of various lubricants on improving the high temperature wear resistance of coating was discussed, and the action mechanism of solid lubricants in the high temperature extreme environment was analyzed. Finally, this paper summarizes the main difficulties involved in increasing the high temperature wear resistance of nickel-based coatings and some problems worthy of attention in the future development.
Keyword ：
laser cladding laser cladding high temperature wear resistance high temperature wear resistance nickel-based coatings nickel-based coatings solid lubricants solid lubricants hard ceramic phase hard ceramic phase
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| GB/T 7714 | Liu, Yingpeng , Wang, Kaiming , Fu, Hanguang . Improvement of the High Temperature Wear Resistance of Laser Cladding Nickel-Based Coating: A Review [J]. | METALS , 2023 , 13 (5) . |
| MLA | Liu, Yingpeng et al. "Improvement of the High Temperature Wear Resistance of Laser Cladding Nickel-Based Coating: A Review" . | METALS 13 . 5 (2023) . |
| APA | Liu, Yingpeng , Wang, Kaiming , Fu, Hanguang . Improvement of the High Temperature Wear Resistance of Laser Cladding Nickel-Based Coating: A Review . | METALS , 2023 , 13 (5) . |
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Abstract ：
高速钢是一种具有高硬度、高耐磨性、高耐热性和优良红硬性的工具钢，然而由于合金元素价格高，其使用范围受到很大限制。在高速钢生产中以廉价的硼替代钨、钼、钒、铌等贵重金属制得的高硼高速钢既降低了成本，又能保证优异的硬度、耐磨性、强韧性、抗高温氧化性。本文综述了合金化、变质处理和热处理对高硼高速钢组织和性能影响，最后对高硼高速钢未来的发展进行了展望。
Keyword ：
合金化 合金化 变质处理 变质处理 高硼高速钢 高硼高速钢 热处理 热处理
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| GB/T 7714 | 刘英鹏 , 袁乃博 , 符寒光 . 高硼高速钢研究进展 [J]. | 大型铸锻件 , 2023 , PageCount-页数: 7 (03) : 45-50,56 . |
| MLA | 刘英鹏 et al. "高硼高速钢研究进展" . | 大型铸锻件 PageCount-页数: 7 . 03 (2023) : 45-50,56 . |
| APA | 刘英鹏 , 袁乃博 , 符寒光 . 高硼高速钢研究进展 . | 大型铸锻件 , 2023 , PageCount-页数: 7 (03) , 45-50,56 . |
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