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摆动激光焊接GH4169镍基高温合金焊缝成形性能研究

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进行了GH4169 镍基高温合金的摆动激光焊接工艺试验,研究了不同摆动参数对焊缝气孔率、宏观成形、微观组织和显微硬度的影响.结果表明:采用小振幅、低频率的摆动工艺有利于气孔的抑制,而大振幅对气孔抑制的作用更为显著.摆动引入后,熔深降低,尤其是随着振幅的增加.2.5 mm振幅下,匙孔焊接模式消失,焊缝生长方向发生变化.相较于未摆动,不同摆动参数下焊缝晶粒尺寸未发生明显变化,但摆动焊缝的二次枝晶有一定程度细化,这导致焊缝平均硬度出现微弱升高.
Forming Performance of GH4169 Ni-based Superalloy Weld Produced by Laser Oscillating Welding
The laser oscillating welding process tests of GH4169 Ni-based superalloy were carried out,and the effects of different oscillating parameters on the porosity,macro-forming,microstructure and microhardness of the welds were studied.The results show that the oscillating process with low frequency and small amplitude is beneficial to the inhibition of porosity,while the inhibition of porosity is more significant under large oscillating amplitude.After the introduction of oscillation,the weld penetration decreases,especially with the increase of amplitude.under the amplitude of 2.5 mm,the keyhole welding mode disappears,and the growth direction of the weld changes.Compared with the non-oscillation,the grain size of the welds doesn't change obviously under different oscillating parameters,however,the secondary dendrites of the oscillating welds are refined to a certain extent,which results in slight rise of the average hardness of the oscillating welds.

GH4169 Ni-based superalloylaser oscillating weldingporositymicrohardness

卢冰、李晨曦、肖雪、刘宏、毛冬远、闫林波、程喜文

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西安交通大学 金属材料强度国家重点实验室,陕西 西安 710049

西安航天发动机有限公司,陕西 西安 710100

火箭军装备部驻某地代表室,陕西 西安 710100

GH4169镍基高温合金 摆动激光焊接 气孔率 显微硬度

国家自然科学基金青年科学基金项目

51305335

2024

热加工工艺
中国船舶重工集团公司热加工工艺研究所 中国造船工程学会船舶材料学术委员会

热加工工艺

CSTPCD北大核心
影响因子:0.55
ISSN:1001-3814
年,卷(期):2024.53(11)