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| TiB_2和TiC复合熔敷棒的制备及电火花涂层特性 | |
| 引用本文： | 罗成,熊翔,董仕节.TiB_2和TiC复合熔敷棒的制备及电火花涂层特性[J].粉末冶金材料科学与工程,2010,15(1):54-58. |
| 作者姓名： | 罗成 熊翔 董仕节 |
| 作者单位： | 1. 湖北汽车工业学院,材料工程系,十堰,442002;中南大学,粉末冶金国家重点实验室,长沙,410083 2. 湖北汽车工业学院,材料工程系,十堰,442002 3. 湖北工业大学,机械工程学院,武汉,430068 |
| 基金项目： | 国家自然科学基金资助项目(50575069) |
| 摘 要： | 利用粉末冶金法制备TiB2和TiC复合材料熔敷棒,并通过电火花沉积在点焊镀锌钢板用电极的表面制备TiB2和TiC复合涂层。利用SEM和XRD分析涂层的微观结构和物相,运用点焊实验测试涂层电极的使用寿命。结果表明:复合材料熔敷棒中TiB2和TiC颗粒细小均匀,电火花涂层致密无分层,涂层物相为Cu、TiB2和TiC;Cu从基体扩散到涂层表面,涂层表面Cu含量(原子分数)达到28%,过渡层出现Cu和Ti的梯度分布,涂层与基体间为牢固的冶金结合;复合涂层存在少量裂纹,其显微硬度达到850HV,高于TiB2涂层和TiC涂层硬度;点焊时电极头部的平均磨损率大大降低,电极的点焊寿命比无涂层电极提高4倍。 |
| 关 键 词： | 镀锌钢板 点焊电极 碳化钛 二硼化钛 复合涂层 电火花沉积 |
Preparation of TiB2 and TiC composite rod and characteristics of electrospark deposited coating |
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| LUO Cheng,XIONG Xiang,DONG Shi-jie.Preparation of TiB2 and TiC composite rod and characteristics of electrospark deposited coating[J].materials science and engineering of powder metallurgy,2010,15(1):54-58. | |
| Authors: | LUO Cheng XIONG Xiang DONG Shi-jie |
| Affiliation: | 1. Department of Material Engineering;Hubei Automotive Industries Institute;Shiyan 442002;China;2. State Key Laboratory of Powder Metallurgy;Central South University;Changsha 410083;3. Mechanical Engineering College;Hubei University of Technology;Wuhan 430068;China |
| Abstract: | TiB2 and TiC composite rod was prepared by compacting and sintering,and the TiB2/TiC coating was deposited by electrosparking onto the surface of cupper alloy electrode used for spot welding of zinc-coated steel plate. Then the coating structure and phase compositions were characterized by SEM and XRD,and lifespan was examined by spot-welding test. The results suggest the TiB2 and TiC particles are fine and dispersive distributed,the TiB2 and TiC composite coating is free from pore and delamilation and a fe... |
| Keywords: | Zinc coated steel spot-welding electrode titanium carbide titanium diboride composite coating electrospark deposition |
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