Li Tao
Associate Professor Supervisor of Doctorate Candidates Supervisor of Master's Candidates
Gender:Female
Alma Mater:Harbin Institute of Technology
Degree:Doctoral Degree
School/Department:School of Mechanical Engineering
Discipline:Mechanical Design and Theory. Intelligent Manufacturing. Mechanical Manufacture and Automation. Mechanical Engineering. Intelligent Manufacturing Technology
Business Address:8027 room, School of Mechanical Engineering building
E-Mail:
Hits:
Date:2019-03-11
Indexed by:Journal Article
Date of Publication:2018-01-01
Journal:激光技术
Included Journals:CSCD
Volume:42
Issue:1
Page Number:53-59
ISSN:1001-3806
Key Words:激光技术;扫描路径选择;热传导;熔覆质量预测
Abstract:为了避免激光熔覆时熔覆层边界处产生过烧和塌陷等缺陷,基于热传导理论分析了基体不同位置的散热差异,采用数值计算方法分析扫描路径对温度场的影响,在激光功率1000W、扫描速率5mm/s、送粉量9.15g/min、扫描间距1.5mm、基体尺寸40mm ×30mm x7mm时,同向熔覆和异侧熔覆比反向熔覆和同侧熔覆边界熔池温度分别降低约300℃和500℃,预测了反向熔覆和同侧熔覆的过烧和塌陷区域并进行了实验验证.结果表明,扫描路径对边界过烧和塌陷的影响很大,同向熔覆和异侧熔覆可以在保证高加工效率、材料利用率以及合理工艺参量的同时提高边界熔覆质量;异侧熔覆可以更好地平衡热量累积与散热间的关系,使熔覆层边界晶粒细密、内部组织分布均匀、性能更加优良.此项研究对提高激光熔覆层质量是有帮助的.
Ph.D, associate professor, doctoral supervisor, graduated from Harbin Institute of technology, mainly engaged in product sustainability evaluation methods, laser repair technology, mechanical equipment energy consumption analysis and evaluation, enterprise information technology development and application. Reviewers of many domestic and foreign journals in related fields, presided over or participated in more than 20 projects of national key research and development plan, national 973 program, national Natural Science Foundation of China and enterprises, and published more than 100 papers. Ph.D Li has trained or assisted in the training of more than 50 doctoral and master degree students.
