摘要
钛合金因其优异的比强度、耐热性和生物相容性，在航空航天、化工和医疗等领域得到广泛应用，然而其耐腐蚀性能受多种因素影响，热处理工艺是关键因素之一。本研究旨在探讨不同热处理工艺对钛合金耐腐蚀性能的影响，选取典型钛合金为研究对象，采用退火、时效等热处理方式，通过电化学工作站测试开路电位、极化曲线，利用扫描电子显微镜观察微观组织形貌，借助X射线衍射分析物相组成。结果表明，不同热处理工艺显著改变钛合金的微观组织结构，进而影响其耐腐蚀性能，其中退火处理使钛合金形成均匀细小的晶粒组织，提高钝化膜稳定性，增强耐腐蚀能力；时效处理促使析出相生成，虽然一定程度上强化合金，但可能成为腐蚀优先发生部位，降低耐腐蚀性。本研究创新性地系统对比多种热处理工艺对钛合金耐腐蚀性能的影响机制，为优化钛合金热处理工艺参数提供理论依据，有助于开发高性能耐腐蚀钛合金材料，推动钛合金在苛刻腐蚀环境中的应用进程。
关键词：钛合金耐腐蚀性能；热处理工艺；微观组织结构
Abstract
Titanium alloys, owing to their excellent specific strength, heat resistance, and biocompatibility, have been widely applied in aerospace, chemical engineering, and medical fields. However, their corrosion resistance is influenced by multiple factors, with heat treatment being one of the critical factors. This study investigates the impact of different heat treatment processes on the corrosion resistance of titanium alloys. Typical titanium alloys were selected as the research subjects, and annealing and aging treatments were employed. The open-circuit potential and polarization curves were measured using an electrochemical workstation, while the microstructural morphology was observed via scanning electron microscopy. X-ray diffraction was utilized to analyze the phase composition. Results indicate that different heat treatment processes significantly alter the microstructure of titanium alloys, thereby affecting their corrosion resistance. Annealing treatment promotes the formation of uniform and fine-grained microstructures, enhancing the stability of the passive film and improving corrosion resistance. In contrast, aging treatment facilitates the precipitation of phases, which, although strengthening the alloy to some extent, may become preferential sites for corrosion initiation, thereby reducing corrosion resistance. This study innovatively provides a systematic comparison of the mechanisms by which various heat treatment processes influence the corrosion resistance of titanium alloys, offering theoretical support for optimizing heat treatment parameters. This work aids in the development of high-performance corrosion-resistant titanium alloys and advances their application in harsh corrosive environments.
Keywords：Corrosion Resistance Of Titanium Alloys; Heat Treatment Process; Microstructure
目 录
摘要 I
Abstract II
一、绪论 1
(一) 研究背景与意义 1
(二) 国内外研究现状 1
(三) 研究方法与技术路线 2
二、钛合金热处理工艺概述 2
(一) 热处理工艺原理 2
(二) 常用热处理工艺类型 3
(三) 工艺参数对组织的影响 4
三、热处理对钛合金耐腐蚀性能的影响机制 4
(一) 腐蚀行为的基本理论 4
(二) 相变与耐腐蚀性的关系 5
(三) 表面状态对腐蚀的影响 6
四、实验研究与结果分析 6
(一) 实验材料与方法 6
(二) 不同工艺下的腐蚀测试 7
(三) 结果讨论与分析 8
结 论 9
参考文献 10
钛合金因其优异的比强度、耐热性和生物相容性，在航空航天、化工和医疗等领域得到广泛应用，然而其耐腐蚀性能受多种因素影响，热处理工艺是关键因素之一。本研究旨在探讨不同热处理工艺对钛合金耐腐蚀性能的影响，选取典型钛合金为研究对象，采用退火、时效等热处理方式，通过电化学工作站测试开路电位、极化曲线，利用扫描电子显微镜观察微观组织形貌，借助X射线衍射分析物相组成。结果表明，不同热处理工艺显著改变钛合金的微观组织结构，进而影响其耐腐蚀性能，其中退火处理使钛合金形成均匀细小的晶粒组织，提高钝化膜稳定性，增强耐腐蚀能力；时效处理促使析出相生成，虽然一定程度上强化合金，但可能成为腐蚀优先发生部位，降低耐腐蚀性。本研究创新性地系统对比多种热处理工艺对钛合金耐腐蚀性能的影响机制，为优化钛合金热处理工艺参数提供理论依据，有助于开发高性能耐腐蚀钛合金材料，推动钛合金在苛刻腐蚀环境中的应用进程。
关键词：钛合金耐腐蚀性能；热处理工艺；微观组织结构
Abstract
Titanium alloys, owing to their excellent specific strength, heat resistance, and biocompatibility, have been widely applied in aerospace, chemical engineering, and medical fields. However, their corrosion resistance is influenced by multiple factors, with heat treatment being one of the critical factors. This study investigates the impact of different heat treatment processes on the corrosion resistance of titanium alloys. Typical titanium alloys were selected as the research subjects, and annealing and aging treatments were employed. The open-circuit potential and polarization curves were measured using an electrochemical workstation, while the microstructural morphology was observed via scanning electron microscopy. X-ray diffraction was utilized to analyze the phase composition. Results indicate that different heat treatment processes significantly alter the microstructure of titanium alloys, thereby affecting their corrosion resistance. Annealing treatment promotes the formation of uniform and fine-grained microstructures, enhancing the stability of the passive film and improving corrosion resistance. In contrast, aging treatment facilitates the precipitation of phases, which, although strengthening the alloy to some extent, may become preferential sites for corrosion initiation, thereby reducing corrosion resistance. This study innovatively provides a systematic comparison of the mechanisms by which various heat treatment processes influence the corrosion resistance of titanium alloys, offering theoretical support for optimizing heat treatment parameters. This work aids in the development of high-performance corrosion-resistant titanium alloys and advances their application in harsh corrosive environments.
Keywords：Corrosion Resistance Of Titanium Alloys; Heat Treatment Process; Microstructure
目 录
摘要 I
Abstract II
一、绪论 1
(一) 研究背景与意义 1
(二) 国内外研究现状 1
(三) 研究方法与技术路线 2
二、钛合金热处理工艺概述 2
(一) 热处理工艺原理 2
(二) 常用热处理工艺类型 3
(三) 工艺参数对组织的影响 4
三、热处理对钛合金耐腐蚀性能的影响机制 4
(一) 腐蚀行为的基本理论 4
(二) 相变与耐腐蚀性的关系 5
(三) 表面状态对腐蚀的影响 6
四、实验研究与结果分析 6
(一) 实验材料与方法 6
(二) 不同工艺下的腐蚀测试 7
(三) 结果讨论与分析 8
结 论 9
参考文献 10
