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| 1 | 等离子喷涂工艺参数对二硅化钼涂层微观结构的影响显示文摘以30~54μm的二硅化钼为喷涂粉末,研究了喷涂参数对二硅化钼涂层微观结构的影响。结果表明,喷涂过程中,喷涂粉末中部分四方相MoSi2(t)转变为六方相MoSi2(h),MoSi2中Si含量出现了烧损。随着喷涂距离、功率、氩气流量和送粉速率的增加,涂层的孔隙率先降低后升高。随着氩气流量和送粉速率的增加,熔融粒子氧化程度逐渐减弱;而喷涂距离和喷涂功率的增加,熔融颗粒氧化加剧,富钼相出现的趋势增加。获得以MoSi2为主相涂层的喷涂工艺规范较宽,较佳的喷涂工艺参数为:喷涂电流500A、电压70V、喷涂距离100mm、送粉量26g/min、氩气流量45 L/min。 | 颜建辉 胡小平 唐思文 许剑光 | 2012 | 热加工工艺2012，41，10： | 10 |
| 2 | 激光熔覆原位自生TiC颗粒增强Ni基复合涂层的组织与性能显示文摘采用激光熔覆技术在H13钢表面制备出原位自生TiC颗粒增强Ni基复合涂层,利用扫描电镜、能谱仪和X射线衍射仪对熔覆层组织、成分和物相进行了分析,并测试了熔覆层显微硬度和耐磨性能。结果表明,激光熔覆层与基体呈良好的冶金结合,涂层中无裂纹、气孔等缺陷。涂层组织由γ-Ni、Cr7C,和TiC等相组成,原位自生TiC颗粒多呈菱形,尺寸在1—3μm之间,涂层显微硬度(800~1000HV0.2)明显高于基体的显微硬度(300HV0.2)。激光熔覆层中存在颗粒强化和细晶强化等多种强化作用,显著提高了H13钢的耐磨性能。 | 郭永强 孙荣禄 雷贻文 郭喜华 | 2009 | 材料热处理学报2009，30，3： | 10 |
| 3 | 激光熔覆原位生成NbC/Ni45合金涂层组织与性能的研究显示文摘利用CO2激光器在45#钢基体上成功制备了原位生成NbC颗粒增强的镍基合金涂层,涂层与基体呈现良好的冶金结合,无裂纹气孔等缺陷。涂层组织主要有γ-Ni树枝晶,枝晶间大量的共晶组织,M2(3CB)6型碳化物和弥散分布的原位生成的NbC颗粒组成。带核的NbC颗粒是以为完全溶解的Nb为核心在其上长大的。由于原位生成NbC颗粒在复合涂层中的均匀分布,使涂层的平均显微硬度高达HV0.2 750,比纯Ni45合金涂层提高了约36%。 | 谢颂京 董刚 | 2012 | 应用激光2012，32，6： | 4 |
| 4 | 碳化物增强金属基激光熔覆层制备技术现状研究显示文摘碳化物是金属涂层中的强化相,它的形态、尺寸、含量等参数对熔覆层的性能影响十分显著。而这些参数又和碳化物增强金属基熔覆层的制备方式(碳化物引入方式)密切相关。综述了碳化物增强金属基激光熔覆层制备技术的研究现状,分析了碳化物“外加法”“原位合成法”“复合引入法”对激光熔覆涂层的影响。 | 郝玲慧 曹雅彬 | 2022 | 热加工工艺2022，51，2： | 4 |
| 5 | Mechanism of Zr in in situ-synthesized particle reinforced composite coatings by laser cladding显示文摘By adding mixture of ZrO_2 and carbon, a Zrenhanced composite coating was produced onto an AISI1045 substrate by laser cladding. The microstructure and phase formation, microhardness and wear resistance of the composite coating were studied. The experimental results indicate that the composite coating with metallurgical bonding to substrate consists of y-Ni, massive ceramic particles of ZrC,NiZr_2, Ni_7 Zr_2,(Fe,Ni)_(23)C_6 and Fe_3 C. The in situ-synthesized ZrC particles are uniformly dispersed in composite coating, which refines the microstructure of composite coating. With different Zr02 and carbon additions, the properties are improved differently. Finally, the fine in situ ZrC particles improve the microhardness of composite coating to HV_(0.2) 650, which is nearly 2.7 times that of Ni25 coating. Also, the composite coating has an advantage in wear resistance; it offers better wear resistance when more mixture of ZrO_2 and carbon was added in nickel alloys. | Yao-Wei Yong Wei Fu Qi-Lin Deng Jian-Guo Yang | 2017 | Rare Metals2017，36，12： | 3 |
| 6 | 激光熔覆技术制备梯度涂层的研究现状显示文摘激光熔覆梯度涂层作为一种新的表面性能强化方法,制备的涂层具有熔覆材料梯度渐变效果。涂层强度高,同时具有优越的耐磨性、抗氧化性、抗腐蚀性、抗冲击性,以及制备成本低及热膨胀系数低等优势,是激光熔覆再制造技术在梯度涂层研究中的一个重要方向。综述了现阶段梯度涂层在制备过程中的方法及研究现状,给出了梯度涂制研制过程的一般性原则。根据现阶段国内外研究成果和存在的普遍性问题,展望了激光熔覆梯度涂层发展方向并提出了建议。 | 解志欣 孙文磊 | 2021 | 热加工工艺2021，50，24： | 3 |
| 7 | Microstructure and Wear Resistance of in situ NbC Particles Reinforced Ni-based Alloy Composite Coating by Laser Cladding显示文摘The in situ synthesized NbC particles reinforced Ni-based alloy composite coating was produced by laser cladding a precursor mixture of Ni-based alloy powder,graphite and niobium powders on a steel substrate.The microstructure,phase composition and wear property of the composite coating were investigated by means of scanning electron microscopy(SEM),X-ray diffraction(XRD)and dry sliding wear test.The experiment results show that the composite coating is homogeneous and free from cracks,and about 0.8 mm thick.The microstructure of the composite coating is mainly composed of NbC particles,CrB type chromium borides,γ-Ni primary dendrites,and interdendritic eutectics.CrB phases often nucleate and grow on the surface of NbC particles or in their close vicinity.NbC particles are formed via in situ reaction between niobium and graphite in the molten pool during the laser cladding process and they are commonly precipitated in three kinds of morphologies,such as quadrangle,cluster,and flower-like shape.Compared with the pure Ni-based alloy coating,the microhardness of the composite coating is increased about 38%,giving a high average hardness of HV0.21000,and the wear rate of the composite coating is decreased by about 32%,respectively.These are attributed to the presence of in situ synthesized NbC particles and their well distribution in the coating. | 董刚 严彪 | 2012 | Journal of Wuhan University of Technology(Materials Science)2012，27，2： | 3 |
| 8 | 粉末粒度对喷涂二硅化钼涂层微观结构的影响显示文摘分别以2.5~15μm、15~30μm、30~54μm和54~74μm四种粒径的二硅化钼为热喷涂粉末,利用大气等离子喷涂技术制备了二硅化钼涂层,通过XRD和带能谱的SEM表征了涂层的微观组织结构。结果表明,喷涂过程中,喷涂粉末中部分四方相MoSi2(t)转变为六方相MoSi2(h),MoSi2中的Si含量出现了损失。随着喷涂粉末粒径的增大,MoSi2粒子在沉积过程中的氧化程度减弱,涂层中的Mo、Mo5Si3等富钼相和MoO3、MoO2等氧化产物的相对含量逐渐减少,而富硅相MoSi2逐渐增加。粉末粒度分别在30~54μm和54~74μm范围时,均可获得以MoSi2为主相的涂层。以粒径30~54μm的粉末制备的涂层组织较致密,内部出现了富钼相'网状'结构的组织。 | 颜建辉 徐红梅 许剑光 胡小平 唐思文 | 2012 | 材料导报2012，26，18： | 3 |
| 9 | 基于第一性原理的碳化铬陶瓷颗粒形貌预测及验证分析显示文摘采用激光熔覆技术制备碳化铬增强Ni60复合涂层,并对其生长形貌与生长机制进行研究和验证。基于第一性原理在Materials Studio(8.0)软件中对碳化铬晶体的生长形貌进行了预测,对Ni基相及Cr_(3)C_(2)陶瓷相的界面结合特性进行了仿真分析,对碳化铬陶瓷相的生长机制进行了研究,并通过熔覆实验对仿真结果进行了验证。实验验证时在Ni60粉末中添加一定含量的C粉及Cr粉,进行球磨作为涂层粉末,采用激光熔覆技术在H13钢表面原位生成碳化铬镍基复合涂层,通过X射线衍射仪(XRD)和扫描电镜(SEM)对涂层的物相和显微组织进行分析,采用维氏硬度计对涂层的显微硬度进行测试。研究结果表明,碳化铬生成相形貌主要为四边形、六边形以及其他不规则形貌,与仿真结果中形貌预测的结果一致。涂层平均显微硬度达到700 HV,是基体硬度的3倍。四边形碳化铬主要为Cr_(3)C_(2),六边形碳化铬以Cr_(7)C_(3)为主,不规则形碳化铬为Cr_(7)C_(3)和Cr_(3)C_(2)的共晶体。原位生成制备的碳化铬增强相弥散分布在涂层中,使得涂层显微硬度较基体得到显著提升,涂层显微组织细密均匀,与基体形成良好的冶金结合。 | 刘琛 李金华 姚芳萍 郭海华 陈翔 | 2022 | 制造技术与机床2022，，10： | 0 |
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