摘要
采用选区激光熔化技术(SelectiveLaserMelting,SLM)制备了GH3230镍基高温合金,研究了工艺参数对GH3230镍基高温合金激光焊接开裂的影响。实验表明,随着扫描间距从0.05mm增加至0.09mm的过程中,母材析出的碳化物平均尺寸在增大,母材晶粒尺寸明显减小,晶界角向右偏移,得到的晶界角分布变得更为均匀。在激光焊接后,由于遗传效应的影响,焊缝处的晶粒随着扫描间距的增大也同母材晶粒一起减小,晶界角分布变得更加均匀,提高整体抵抗裂纹能力,焊缝中裂纹总长和最大长度都逐渐降低,裂纹数量逐渐减少。最终得出在扫描间距为0.09mm时,成形的合金试样在多种焊接工艺条件下抵抗开裂的能力最佳。
GH3230 nickel based superalloy was prepared by Selective Laser Melting(SLM).The influence of process parameters on the laser welding cracking of GH3230 nickel based superalloy was studied.The experimental results showed that with the increase of scanning distance from 0.05 mm to 0.09 mm,the average size of carbides precipitated from the base material increased,the grain size of the base material decreased obviously,and the grain boundary angle shifted to the right,the obtained grain boundary angle distribution became more uniform.After laser welding,due to the influence of genetic effect,the grain at the weld decreased with the increase of scanning spacing,the grain boundary angle distribution became more uniform,and the overall crack resistance was improved.The total length and maximum length of cracks in the weld were gradually reduced,and the number of cracks was gradually reduced.The results showed that when the scanning interval is 0.09mm,the formed alloy sample had the best cracking resistance under various welding conditions.
作者
张泽宇
闫梦喆
罗文睿
席鑫
路永新
林丹阳
宋晓国
Zhang Zeyu;Yan Mengzhe;Luo Wenrui;Xi Xin;Lu Yongxin;Lin Danyang;Song Xiaoguo(College of Materials Science and Engineering,Shanxi Provincial Key Laboratory of Corrosion Protection and New Materials for Oil and Gas Fields,Xi’an Shiyou University,Xi’an 710065;School of Materials Science and Engineering,Shandong Provincial Key Laboratory of Special Welding Technology,Harbin Institute of Technology(Weihai),Weihai 264290)
出处
《航天制造技术》
2024年第3期54-59,共6页
Aerospace Manufacturing Technology
基金
国家自然科学基金(522***48)
山东省自然科学基金(ZR2****E087)。
