摘要
激光增材制造技术可以直接成形出任意复杂结构且性能优异的金属零件,但激光增材制造过程中瞬态的熔化/凝固熔覆层所致的内应力,导致成形零件变形和开裂,是长期制约高性能大型金属零件激光增材制造发展和应用的瓶颈,更是决定该技术优势能否得以充分发挥并走向工程应用的基础。详细介绍了辅助激光增材制造技术调控成形零件内应力问题研究现状,阐述各技术特点及优缺点,为解决内应力造成零件易于变形开裂的"控形"难题提供借鉴。
Laser additive manufacturing can fabricate metal parts with complex structure and excellent performance,which provides a new way for complex parts manufacturing of the aerospace,military and other areas.However,the internal stress in cladding layers caused by transient melting/solidification tends to make distortion and cracking,which becomes the bottleneck problems of the technology.The research status of auxiliary laser additive manufacturing technology was descirbed to solve the internal stress problem of forming metal parts,and technical characteristics and advantages were analyzed.It is meaningful to solve the tensile stress of metal parts fabricated by laser additive manufacturing.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2018年第2期160-163,共4页
Special Casting & Nonferrous Alloys
基金
渭南职业技术学院青年科研基金资助项目(WZYQ201605)
关键词
激光增材制造
复合增材制造
金属3D打印
内应力
Laser Additive Manufacturing, Hybrid Additive Manufacturing, Metal 3D Printing, Internal Stress
