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1 镍基单晶高温合金DD491和DD6的名义化学成分 (mass fraction / %)

Table 1 Nominal chemical compositions of the DD491 and DD6 Ni-based single-crystal superalloys

Alloy Co Cr + W + Mo + Ta Re Ru Al Hf Ni DD491 12.0 19.0 5.4 3.0 5.8 0.1 Bal. DD6 9.0 21.8 2.0 - 5.6 0.1 Bal.