摘要
采用电子束焊,对空冷器管箱Incoloy 825镍基高温合金进行对接焊试验.通过对焊接接头的组织观察,并结合拉伸力学性能以及接头的冲击韧性等试验,分析镍基高温合金电子束焊接头的组织和力学性能.结果表明,采用电子束焊焊接镍基高温合金可以得到良好的焊接接头,焊缝区组织由大片等轴晶和少量柱状晶组成;焊缝区没有出现明显的元素烧损现象;焊缝、热影响区硬度达到母材硬度值;焊缝接头抗拉强度达到600 MPa,接近母材抗拉强度,接头断裂形式为韧性断裂;焊缝和热影响区的冲击吸收能量高于母材区,其中焊缝区的冲击吸收能量达到了262 J,冲击断口形貌为韧窝状.
The butt test of Incoloy 825 nickel base superalloy in air cooler tube box was studied by electron beam welding.The microstructure of electron beam welded joints was analyzed by observing the structure of welded joints,and the mechanical properties of electron beam welded joints were analyzed with tensile properties and impact toughness tests.The results show that good weld joint of lncoloy 825 alloy can be obtained by electron beam welding.The weld zone is composed of large equiaxed grains and a few columnar crystals.There is no obvious element loss in the we41d area.The hardness of weld and heat affected zone reaches the hardness value of base metal.The tensile strength of the weld joint reaches 600 MPa,which is close to the tensile strength of the base metal,and the fracture form of the joint is ductile fracture.The impact value in the weld and heat affected zone is higher than that of the base metal,in which the impact energy in the weld joint reaches 262 J,and the impact fracture morphology is ductile fracture.
作者
张建晓
管志忱
黄健康
杨志海
樊丁
ZHANG Jianxiao;GUAN Zhichen;HUANG Jiangkang;YANG Zhihai;FAN Ding(State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals,Lanzhou University of Technology,Lanzhou,730050,China;Lanzhou LS Heavy Equipment Co.,LTD.,Lanzhou,730314,China;Lanzhou Changzheng Machinery Co.,LTD.,Lanzhou,730299,China)
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2020年第10期32-37,I0003,共7页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(51775256)。
关键词
电子束焊
镍基高温合金
微观组织
力学性能
electron beam welding
Incoloy 825
microstructure
mechanical property
