搭接工艺对选区激光熔化镍基单晶高温合金DD491晶体取向与微观组织的影响

张振武, 李继康, 许文贺, 沈沐宇, 戚磊一, 郑可盈, 李伟, 魏青松

Effects of Overlapping Process on Grain Orientation and Microstructure of Nickel-Based Single-Crystal Superalloy DD491 Fabricated by Selective Laser Melting

ZHANG Zhenwu, LI Jikang, XU Wenhe, SHEN Muyu, QI Leiyi, ZHENG Keying, LI Wei, WEI Qingsong

表2 选区激光熔化(SLM)成形单道和多道搭接试样的工艺参数

Table 2 Processes for selective laser melting (SLM)-fabricated single-track and multi-track overlapping samples

Processes P / W v / (mm·s-1) h / mm S1: low power, low speed 260 500 0.06, 0.09, 0.12, 0.15 S2: low power, medium speed 260 600 0.06, 0.09, 0.12, 0.15 S3: high power, medium speed 310 600 0.06, 0.09, 0.12, 0.15 S4: high power, high speed 310 700 0.06, 0.09, 0.12, 0.15