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服役于高含硫油气勘测、开采的设备,受到介质、温度、压力的影响,容易发生应力腐蚀和应力腐蚀断裂(SSC和SCC),这就对金属材料的力学及耐腐蚀性能提出了苛刻的要求。本文对铁镍基合金3YC61的强韧化工艺开展了系统研究,结果表明:3YC61合金的最佳固溶热处理温度为980~1000℃;最佳一级时效热处理温度为730~770℃,辅以炉冷至620℃+620℃×7 h+AQ的二级时效热处理(总时效时间18 h)后,合金的力学性能均达到甚至超过了Incoloy 925合金的性能指标。直接时效强韧化能同时提高3YC61合金的强度、韧性和塑性,合金的综合性能特别是强度已接近Inconel 718合金。
Equipment operating in the exploration and exploitation of high-sulfur hydrocarbons is susceptible to stress corrosion and stress corrosion cracking (SSC and SCC) due to media, temperature and pressure, which raises a serious challenge to the mechanical and corrosion resistance of metallic materials Claim. In this paper, the strengthening and toughening process of Fe-Ni-based alloy 3YC61 has been systematically studied. The results show that the optimum solution heat treatment temperature of 3YC61 alloy is 980 ~ 1000 ℃, the optimum temperature of aging treatment is 730 ~ 770 ℃, After the furnace cooled to 620 ℃ + 620 ℃ × 7 h + AQ secondary aging heat treatment (total aging time 18 h), the mechanical properties of the alloy reached or even exceeded the performance of Incoloy 925 alloy. Direct aging toughening can improve 3YC61 alloy strength, ductility and plasticity, the overall performance of the alloy, especially the strength is close to Inconel 718 alloy.