文章编号：1004-0609(2010)S1-s1013-03
TC4钛合金紧固件的α污染层
(北京航空制造工程研究所，北京 100024)
摘 要: 采用金相法对950 ℃真空淬火TC4钛合金紧固件污染层的微观组织、显微硬度及力学性能进行分析。结果表明：检测钛合金紧固件污染层，并TC4 紧固件富氧α层不连续且厚度小于20 μm可小幅提高支撑面的硬度，且对性能影响较小，可以适当允许其存在。
关键字: 钛合金；污染层；显微硬度
α contamination layer of TC4 titanium alloy fasteners
（Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, China）
Abstract:The metallograph, microhardness and mechanical properties of contamination layer on TC4 titanium alloy fasteners treated by vacuum hardening at 950 ℃ were studied. The results show that it will be allowed when the depth of discontinuity rich-oxygen α layer of TC4 titanium alloy fasteners is less than 20 μm.
Key words: titanium alloy; contamination layer; microhardness
