摘要
分别以高纯石墨粉C和C +Nb混合粉末为原料 ,对Ti 4 6Al 2Cr 1 5Nb 1V合金进行了激光表面合金化处理 ,对激光改性层的显微组织以及成分进行了观察与分析 ,并对该合金原始组织及经C或C +Nb激光表面改性层的室温耐磨性能进行了对比分析研究。研究结果表明 ,C和C +Nb激光表面合金化处理后 ,在合金表面均“原位”形成了TiC颗粒 ,Nb以固溶原子形式存在于表面改性层中 ,TiC颗粒的大小 ,形态及分布强烈取决于激光工艺参数 ;经C或C +Nb激光表面合金化处理后 ,TiAl合金的室温滑动磨损耐磨性能均有不同程度的提高 ,其中经C
Laser surface alloying with C and C + Nb was used to modify the surface properties of Ti-46Al-2Cr-l.5Nb-lV alloy. The microstructure of the laser alloyed surface layer was studied as a function of laser processing parameters. The wear resistance of the original alloy and the samples laser surface alloyed with C and C + Nb at room temperature were investigated. The results indicate that, the particles of TiC are in-situ produced in the laser treated surface layer for the samples laser surface alloyed with C and C + Nb. Nb exists in the alloy matrix as the solute atom. The size, shape and distribution of TiC are strongly dependent on the laser processing parameters. By laser surface alloying with C or C + Nb powders, wear resistance of the Ti-Al-Cr-Nb-V alloy at room temperature improved in comparison with the original alloy and the sample alloyed with C + Nb exhibits the best wear resistance.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2004年第4期63-66,共4页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金资助 (50 371 0 72 )
湖南教育厅青年基金资助 (0 1B0 0 2 )
关键词
TIAL合金
激光表面合金化
显微组织
耐磨性
Alloying
Aluminum alloys
Coatings
Lasers
Microstructure
Surface properties
Titanium alloys
Titanium carbide
