| 摘要: |
| 某型号钛合金涡轮泵在焊后去应力退火中，由于炉内真空度未达到工作压强标准，导致在真空退火后零件表面产生氧化现象。对涡轮泵的氧化程度进行了分析，并提出了解决措施。经线扫描分析表明，TC4钛合金材料在真空度较差的去应力退火中，氧化现象发生在材料表层10μm深度左右，氧化层可通过酸洗工艺去除，且酸洗对零件外形尺寸无影响。即使在满足工作标准的真空下进行去应力退火，也会有少量非金属元素扩散到材料内部，但对其力学性能无严重影响。 |
| 关键词: TC4钛合金 真空去应力退火 氧化 线扫描分析 酸洗 |
| 基金项目: |
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| Analysis and Treatment Measures on Oxidation of Relief Annealing of TC4 Titanium Alloy |
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Fang Kun
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Aerospace Science and Industry Harbin Fenghua Co., Ltd., Harbin 150000
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| Abstract: |
| Since the vacuum degree in the furnace did not reach the level of working requirement, a certain type of titanium alloy turbo pump was oxidized in process of relief annealing after welding. The degree of oxidation of the turbo pump is analyzed, and the solutions for elimination of oxidation are proposed. Line-scanning analysis shows that the oxidation phenomenon of the TC4 titanium alloy, in relief annealing of worse vacuum, only occurs on the surface of the material around 10μm depth, and the oxidation layer can be removed by acid pickling. The acid pickling has no effect on overall dimension. Even if the vacuum degree reaches the working requirement, a small amount of non-metallic elements will diffuse into the inner part of material. The solution has no serious effect on mechanical properties of material. |
| Key words: TC4 titanium alloy vacuum relief annealing oxidation line-scanning analysis acid pickling |
