[钛基体上激光原位反应熔覆硼钛化物/钛复合涂层]钛基体上激光原位反应熔覆
硼钛化物/钛复合涂层
丁龙先1,2 NAKASA K3 KATO M4
(1. 沈阳大学机械工程学院,沈阳 110044;
2. 辽宁省先进材料制备技术重点实验室(沈阳大学);
3. Faculty of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan(Present Address: Faculty of Engineering, Hiroshima Kokusai Gakuin University, Hiroshima 739-0321, Japan);
4. Faculty of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan)
摘 要:采用YAG激光照射不同比例的Ti与TiB2混合粉末的方法,在工业纯钛基体上熔覆耐磨覆盖层。当TiB2加入量较低时宜采用能量密度较低的激光束,反之采用能量密度较高的激光束照射为宜。对Ti与TiB2的摩尔比为50:50熔覆层的综合分析表明:熔覆后TiB2已经与Ti反应生成了TiB或Ti3B4,并且熔覆层分别由Ti与TiB的混合物组成的表面粗大组织和由Ti与TiB或Ti3B4的混合物组成的中间细小组织构成,其显微维氏硬度明显高于基材。
关键词:激光;熔覆;纯钛;原位反应
Laser in-situ reaction cladding of titanium
boride/titanium composite on titanium substrate
DING Longxian1.2 NAKASA Keijiro3 KATO Masahiko4
(1. School of Mechanical Engineering, Shenyang University, Shenyang, 110044; 2. Liaoning Key laboratory of Advanced Materials Fabrication Technology(Shenyang University); 3. Faculty of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan(Present Address: Faculty of Engineering, Hiroshima Kokusai Gakuin University, Hiroshima 739-0321, Japan); 4. Faculty of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan)
Abstract: An antiwear cladding layer was produced on Titanium substrate by YAG laser with mixed powders of Ti and TiB2. A good surface morphology can be obtained easily by both a lower or higher laser energy density beam with a lower or higher addition of TiB2 respectively. TiB2 and Ti have reacted to form TiB or Ti3B4 during cladding for 50:50 molar ratio of TiB2 to Ti, and the structure of cladding layer is consisted of a course surface layer composed of Ti and TiB and a fine interface layer composed of Ti and TiB(or Ti3B4). The micro-Vickers hardness of the cladding layer is significantly higher than the substrate.
Keywords: laser; cladding; pure titanium; in-situ reaction