激光增材制造金属零件内应力调控研究现状

李少海; 李昭青

doi:10.15980/j.tzzz.2018.02.012

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激光增材制造金属零件内应力调控研究现状
Research Status of Internal Stress in Metal Laser Additive Manufacturing
2018年38卷第2期页码：160-163
纸质出版日期： 2018 ，
DOI： 10.15980/j.tzzz.2018.02.012

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[1]李少海,李昭青.激光增材制造金属零件内应力调控研究现状[J].特种铸造及有色合金,2018,38(02):160-163.

Li Shaohai, Li Zhaoqing. Research Status of Internal Stress in Metal Laser Additive Manufacturing[J]. Special Casting & Nonferrous Alloys, 2018,38(2):160-163.
[1]李少海,李昭青.激光增材制造金属零件内应力调控研究现状[J].特种铸造及有色合金,2018,38(02):160-163. DOI： 10.15980/j.tzzz.2018.02.012.

Li Shaohai, Li Zhaoqing. Research Status of Internal Stress in Metal Laser Additive Manufacturing[J]. Special Casting & Nonferrous Alloys, 2018,38(2):160-163. DOI： 10.15980/j.tzzz.2018.02.012.

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。

Abstract

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.