摘要
采用CO2横流激光器在低碳钢基体表面熔覆含稀土氧化物La2O3的镍基TiC金属陶瓷复合层;研究了不同含量的La2O3对激光熔覆镍基金属陶瓷复合层组织及性能的影响。结果表明,加入适量的稀土氧化物La2O3,可有效地改善激光熔覆复合层的显微组织,减少复合层中的裂纹、孔洞、夹杂;加速复合层中TiC颗粒的溶解和改善TiC颗粒的形状变化,且使熔覆复合层的耐磨性和耐蚀性明显提高。
The Nibased metalceramic coatings on the surface of mild steel are clad by a great power CO2 laser. The effects of rareearth oxide La2O3 and CeO2 on the microstructure and properties of Nibased metalceramic coatings are investigated. The results show that the microstructure and properties of clad coatings with rareearth oxide have been bettered and are superior to those without rareearth oxideThe crackles, holes and entrapment in the coatings have been reduced and TiC particles are more slippy. The wearresistance and anticorrosion of clad coatings with rareearth oxide have witnessed a significant increase
出处
《武汉科技大学学报》
CAS
2003年第1期8-10,共3页
Journal of Wuhan University of Science and Technology
关键词
激光熔覆
稀土氧化物
金属陶瓷
laser cladding
rare-earth oxide
metal-ceramic
