| 固溶处理对Incoloy825合金钢管组织和性能的影响 |
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| 引用本文： | 张玉成,贾浩梅.固溶处理对Incoloy825合金钢管组织和性能的影响[J].金属热处理,2022,47(9):134-139. |
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| 作者姓名： | 张玉成 贾浩梅 |
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| 作者单位： | 合肥实华管件有限责任公司, 安徽 合肥 230601 |
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| 基金项目： | 合肥市关键技术“借转补”研发项目(J2020G31) |
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| 摘 要： | 通过金相分析、拉伸试验和晶间腐蚀试验,研究了固溶处理对Incoloy825合金组织和性能的影响。结果表明,随着固溶温度的升高,Incoloy825合金晶粒有长大趋势,但在不同温度固溶,晶粒生长速度有所不同,当固溶温度超过1000 ℃后,晶粒长大迅速,并伴生退火孪晶。当在950 ℃固溶时间小于30 min时,基体出现混晶组织,保温60 min后,混晶状态得以改善,基本为等轴晶,平均晶粒度为7级。随着固溶温度的升高和保温时间的延长,抗拉强度和屈服强度均有不同程度的下降,伸长率总体呈上升趋势。Incoloy825合金的晶间腐蚀速率随着固溶温度的升高和保温时间的延长呈现先下降后平稳的趋势,在950 ℃固溶60 min后,腐蚀速率基本稳定在0.12 mm/y左右,随着固溶温度继续升高,晶间腐蚀速率没有明显差异。Incoloy825合金在950 ℃固溶60 min后,其力学性能和耐晶间腐蚀性能综合效果最佳。
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| 关 键 词： | Incoloy825合金 固溶处理 晶粒度 力学性能 晶间腐蚀 |
| 收稿时间： | 2022-04-21 |
Effect of solution treatment on microstructure and properties of Incoloy825 alloy pipe |
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| Zhang Yucheng,Jia Haomei.Effect of solution treatment on microstructure and properties of Incoloy825 alloy pipe[J].Heat Treatment of Metals,2022,47(9):134-139. |
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| Authors: | Zhang Yucheng Jia Haomei |
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| Affiliation: | Hefei Shihua Pipe Fittings Co. , Ltd. , Hefei Anhui 230601, China |
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| Abstract: | Effect of solution treatment on microstructure and properties of Incoloy825 alloy was studied by means of metallographic analysis, tensile test and intergranular corrosion test. The results show that the grain size of the Incoloy825 alloy tends to increase with the increase of solution treatment temperature, but the grain growth rate is different at different solution treatment temperatures. When the solution treatment temperature exceeds 1000 ℃, the grains grow rapidly, accompanied by annealed twins. When the solution holding time is less than 30 min at 950 ℃, the mixed-sized grain structure appears in the matrix. After holding for 60 min, the mixed-sized grain state is improved, basically equiaxed grains are obtained with an average grain size of grade 7. With the increase of solution treatment temperature and the extension of holding time, the tensile strength and yield strength of the Incoloy825 alloy decrease to varying degrees, and the elongation increases. The intergranular corrosion rate of the Incoloy825 alloy decreases firstly and then stabilizes with the increase of solution treatment temperature and holding time. After solution treatment at 950 ℃ for 60 min, the corrosion rate basically stabilizes at 0.12 mm/y, and there is no significant difference in the intergranular corrosion rate with the increase of solution treatment temperature. The comprehensive effect of mechanical properties and intergranular corrosion resistance of the Incoloy825 alloy are the best after solution treatment at 950 ℃ for 60 min. |
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| Keywords: | Incoloy825 alloy solution treatment grain size mechanical properties intergranular corrosion |
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