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我厂采用Ni18Co9Mo5Ti马氏体时效钢制造φ1.2米的试验发动机壳体。钢板厚度为3±~(0.2)毫米,用TiG方法进行焊接,壳体有纵向和环向焊缝。采用820℃/30分空冷+500℃/3小时时效的热处理制度。其性能指标:基
Our factory uses Ni18Co9Mo5Ti maraging steel to make φ1.2m test engine shell. Steel thickness of 3 ± ~ (0.2) mm, with TiG welding method, the shell has a longitudinal and circumferential weld. Using 820 ℃ / 30 min air cooling + 500 ℃ / 3 hours aging heat treatment system. Its performance indicators: base