| 吴东江,卢卫锋,陈云啸,马广义,郭玉泉,郭东明.钛基体激光直接熔覆ZrO 2涂层实验研究[J].,2012,(4):503-508 |
| 钛基体激光直接熔覆ZrO 2涂层实验研究 |
| Experimental study of laser direct cladding of ZrO 2 coating on titanium substrate |
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| DOI：10.7511/dllgxb201204007 |
| 中文关键词: 激光熔覆 陶瓷涂层 同轴送粉 氧化锆 钛基体 |
| 英文关键词: laser cladding ceramic coating coaxial powder feeding ZrO 2 titanium substrate |
| 基金项目:国家自然科学基金资助项目(51175061);“九七三”国家重点基础研究发展计划资助项目(2009CB724307). |
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| 中文摘要: |
| 采用激光同轴送粉工艺在钛基体上直接熔覆ZrO 2陶瓷涂层,研究不同工艺参数对单道熔覆层熔覆质量的影响规律；采用光学显微镜观察陶瓷涂层的微观组织,并采用电子探针技术分析基体和ZrO 2陶瓷结合区成分分布；利用XRD分析激光熔覆前后ZrO 2陶瓷物相变化情况．结果表明:在一定的功率范围内,熔覆层宽度受激光功率的影响不大,熔覆层高度和基体熔化深度随工艺参数的变化呈现一定的规律性；ZrO 2和Ti基体结合区形成很好的成分梯度渐变过渡,陶瓷微观组织为细小的枝状晶组织；激光熔覆ZrO 2陶瓷后,单斜相(m相)衍射峰强度相对减弱． |
| 英文摘要: |
| Laser direct cladding of ZrO 2 ceramic coating on titanium substrate was proceeded by coaxial powder feeding. The regularity of influence of different process parameters on single-layer coating quality was studied; the microstructure of ceramic coating was evaluated using optical microscope, and the composition distribution in bonded zone of titanium and ZrO 2 was detected using electron probe. The phase transformation between initial powder and coating was determined by X-ray diffraction. Experimental results show that the laser power has little effect on cladding layer width within a certain range, and the variation of cladding layer height and depth of substrate fusion has a regular pattern with process parameters change. Compositionally graded transition has been formed in ZrO 2 and Ti bonded zone, and the microstructure of ceramic is a structure of fine dentrite. The monoclinic phase(m) reduces after ZrO 2 is cladded by laser. |
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