GH3039
GH3039为单相奥氏体型固溶强化合金,在800℃以下具有中等的热强性和良好的热疲劳性能,1000℃以下抗氧化性能良好。长期使用组织稳定,还具有良好的冷成形性和焊接性能。适宜于850℃以下长期使用的航空发动机燃烧室和加力燃烧室零部件。该合金可以生产板材、棒材、丝材、管材和锻件。
化学成分
C | Cr | Ni | Al | Ti | Mo | Nb |
≤0.08 | 19.0~22.0 | 余量 | 0.35~0.75 | 0.35~0.75 | 1.80~2.30 | 0.90~1.30 |
Fe | Si | S | Mn | P |
≤3.00 | ≤0.80 | ≤0.012 | ≤0.40 | ≤0.02 |
注:合金中允许有Ce存在。合金中Cu=0.20%。
物理及化学性能
热导率
θ/℃ | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 |
λ/(W/(m·C)) | 13.8 | 15.5 | 17.2 | 18.8 | 20.5 | 21.8 | 23.4 | 25.1 | 26.8 |
比热容
θ/℃ | 150 | 200 | 300 | 400 | 500 | 600 | 700 | 800 |
c/(J/(kg.K)) | 544 | 574 | 636 | 645 | 762 | 779 | 921 | 1047 |
GH30线膨胀系数
θ/℃ | 20~100 | 20~200 | 20~300 | 20~400 | 20~500 | 20~600 | 20~700 | 20~800 | 20~900 | 20~1000 |
α/10-6C-1 | 11.5 | 12.4 | 13.2 | 13.5 | 13.8 | 14.3 | 14.9 | 15.3 | 15.8 | 16.4 |
密度:ρ=8.3g/cm3
金相组织结构
合金在固溶状态为单相奥氏体,并含有少量Ti(CN)、NbC及M23C6碳化物
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