邓桢桢,郭世杰,刘成

• 1:中铝材料应用研究院有限公司苏州分公司
• 2:中铝材料应用研究院有限公司

摘要(Abstract)：

采用拉伸试验、晶间腐蚀试验、光学显微镜、扫描电镜和透射电镜等研究了不同时效工艺对连铸连轧法生产的高强度紧固件用6056铝合金线杆力学性能和晶间腐蚀性能的影响。结果表明：6056铝合金线杆经180℃×2 h+160℃×120 h双级时效后屈服强度、抗拉强度和伸长率分别为354 MPa、406 MPa和16%,比经180℃×6 h单级时效后的屈服强度和抗拉强度提高10～30 MPa,且耐晶间腐蚀性能有所改善。6056铝合金析出强化相主要是β″相和含Cu(U和Q′)相。晶界处连续分布的含Cu(Q)相增大了晶间腐蚀敏感性，而断续分布的含Cu(Q)相降低了晶间腐蚀敏感性。

关键词(KeyWords)： 6056铝合金;力学性能;晶间腐蚀;紧固件;线杆

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 邓桢桢,郭世杰,刘成

DOI: 10.13289/j.issn.1009-6264.2022-0063

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