镍基高温合金定向凝固用陶瓷型壳粘砂反应

石振威, 郑伟, 卢玉章, 张功, 申健

Sand-burning Reaction of Ceramic Shell for Directional Solidification of Nickel-based Superalloy

SHI Zhenwei, ZHENG Wei, LU Yuzhang, ZHANG Gong, SHEN Jian

表6 各指标的极差结果

Table 6 Range analysis of various indicators

Indicator Factor K1 K2 K3 R Sand-burning proportion/% A 6.46 13.60 14.12 7.66 B 11.29 10.35 12.54 2.19 C 6.59 15.32 12.27 8.73 D 12.18 9.58 12.42 2.84 Surface roughness Ra/μm A 6.91 7.75 8.00 1.09 B 8.27 6.04 8.35 2.31 C 7.04 7.66 7.95 0.91 D 7.07 8.23 7.36 1.16 Porosity/% A 20.29 48.07 67.27 46.98 B 43.20 47.74 44.69 4.54 C 46.16 51.87 37.60 14.27 D 50.46 39.49 45.68 10.97