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研究了热处理工艺对铁镍基合金热挤压厚壁管力学性能的影响。结果表明:由于挤压温度高、速度快,且挤压完成后采用了水冷冷却,试验合金挤压态的力学性能和固溶态的力学性能非常接近,挤压后直接时效态和固溶+时效态合金的力学性能也非常接近。随着固溶温度升高,试验合金的强度下降、韧塑性上升,适宜的固溶处理温度是960~1040℃。随着时效温度的升高,试验合金的强度呈现先升高后降低的趋势,而韧塑性表现出大致相反的变化规律,其转折点温度均为740℃。随着时效时间的延长,试验合金的强度呈现先急剧增大后缓慢增加再后几乎不变的趋势,而韧塑性表现出大致相反的变化规律,适宜的时效时间为不超过16 h。
The effect of heat treatment on the mechanical properties of hot-extruded thick-walled iron-nickel-base alloy was investigated. The results show that the mechanical properties of the alloy in the extruded state are very close to those in the solid solution state due to the high extrusion temperature, high speed and water cooling after the extrusion is completed. The direct aging and the solution + The mechanical properties of aged alloys are also very close. With the increase of solid solution temperature, the strength of the test alloy decreased and the toughness and plasticity increased. The proper solution treatment temperature was 960 ~ 1040 ℃. With the increase of aging temperature, the strength of the test alloy first increased and then decreased, while the ductility and plasticity showed roughly the opposite variation, the turning point temperature was 740 ℃. With the extension of the aging time, the strength of the test alloy increases sharply first and then slowly increases and then almost invariable. However, the ductility and ductility of the alloy shows roughly the opposite trend, and the suitable aging time is less than 16 h.