GH3230合金选区激光熔化成形工艺对激光焊开裂的影响研究
Study on the Influence of Selective Laser Melting Process on the Laser Welding Cracking of GH3230 Alloy
张泽宇 1闫梦喆 1罗文睿 2席鑫 2路永新 1林丹阳 2宋晓国2
作者信息
- 1. 西安石油大学材料科学与工程学院,油气田腐蚀防护与新材料陕西省高等学校重点实验室,西安 710065
- 2. 哈尔滨工业大学(威海)材料科学与工程学院,山东省特种焊接技术重点实验室,威海 264290
- 折叠
摘要
采用选区激光熔化技术(Selective Laser Melting,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0.05 mm增加至0.09 mm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.
Abstract
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.
关键词
选区激光熔化/GH3230合金/扫描间距/焊接裂纹Key words
selective laser melting/GH3230 alloy/hatch spacing/welding crack引用本文复制引用
基金项目
国家自然科学基金(522***48)
山东省自然科学基金(ZR2****E087)
出版年
2024
NETL
NSTL
万方数据