3D打印的经典论文。

第36卷　第12期

中　国　激　光V ol .36,No .12

2009年12月C HINESE JOU RNA L OF LASERS December ,2009

　　文章编号:0258-7025(2009)12-3204-06

大型钛合金结构件激光直接制造的进展与挑战

(邀请论文)

王华明1　张述泉1　王向明

21

北京航空航天大学大型整体金属构件激光直接制造教育部工程研究中心,北京1001912中国航空工业集团公司沈阳飞机设计研究所,辽宁沈阳110037

摘要　简要介绍大型钛合金结构件激光直接制造的技术特点及其在航空航天等工业装备中的应用前景,重点报道大型钛合金结构件激光直接成形制造工艺、内部质量控制和应用研究进展。深入评述大型钛合金结构件激光直接成形制造技术发展面临的问题及其热物理、熔池非平衡冶金动力学、内部组织快速凝固和内部缺陷控制的复杂性。指出零件“变形和开裂”预防和“内部质量”控制是目前制约该技术发展和应用的关键“瓶颈难题”,只有加强对零件“内应力演化规律与变形开裂行为”及“凝固组织形成规律及内部缺陷形成机理”等基础问题的研究和认识,才能有效解决上述瓶颈难题。

关键词　激光技术;激光直接制造;钛合金;金属结构件;航空航天

中图分类号　T N 249;T G146.2　　　文献标识码　A 　　　doi :10.3788/CJL20093612.3204

Progress and Challenge s of Laser Direct Manufacturing of

Large Titanium Structural Compone nts

(Invited Pape r )

Wang Huaming 1　Zhang Shuquan 1　Wang Xiangming

21Engineering Research Center of Minist ry of Educatio n on Laser D irect Manufacturing of Larg e Metal Components ,

Beijing University of Aeronautics and Ast ronaut ics ,Beijing 100191,China

2Shenyang Aircraft D esig n and Research Institute ,

Aviatio n Indust ry Corporation of China ,Shenyang ,Liaoning 110037,China

Abstract 　The technologica l and econom ic advantages of laser direct manufacturing of large titanium structural c om ponents in c om parison to the traditional forging process are briefly summarized and their industrial applic ation potentia ls in the aerospace industries are prospected .State of the art on processing optimization ,microstructure and mec hanical properties control ,equipment development and engineering applications in aerospac e industries are reported .The tec hnological challenges fac ing the further development of the technology is reviewed .Physical and metallurgical c omplexities of laser direct manufacturing of large titanium structural c om ponents are analyzed with a special emphasis on the thermal physic s of the deposition process ,extraordinary meta llurgical kinetic s of the laser induced high -temperature melt pool ,the forming mec hanisms of the unique non -equilibrium rapidly solidified structures and various inherent internal defects .It is pointed out that efficient prevention of “component distortion and cracking ”as well as control of “interna l structure and defects ”are currently the two “bottle -neck ”obstacles c hallenging the further development and industrial applications of the revolutionary advanced manufacturing technology .I ntensive basic research and more fundamental understanding on the non -stea dy state evolution and intera ction behaviors of interna l stresses and the forming mechanisms of rapid solidification microstructures and internal defects are needed in order to effectively overcome the above “bottle -neck ”problems .

Key wo rds 　la ser technique ;la ser direct manufacturing ;titanium alloys ;meta ls structural c omponents ;aerospace

　　收稿日期:2009-10-15;收到修改稿日期:2009-10-24

　　基金项目:国家863计划(2007A A 041904)、国家973计划(2006CB605206,2010CB731705)、国家杰出青年基金(50625413)和教育部长江学者和创新团队发展计划(I RT 0805)资助项目。

　　作者简介:王华明(1962—),男,教授,工学博士,主要从事高性能金属材料快速凝固激光制备与大型金属构件激光直接制造技术等方面的研究。E -mail :wa ng hm @buaa .edu .cn

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