• CN:11-2187/TH
  • ISSN:0577-6686

›› 1993, Vol. 29 ›› Issue (4): 60-64.

• 论文 • 上一篇    下一篇

LY11硬铝型材挤压淬火的研究

王玉林;郑炀曾;王明智;张浩   

  1. 燕山大学;大连重型机器厂
  • 发布日期:1993-07-01

QUENCHING ON EXTRUSION PRESS FOR LY11 DURALUMIN

Wang Yulin;Zhen Yangzeng;Wang Mingzhi;Zhang Hao   

  1. Yanshan University Dalian Heavy Machinary Works
  • Published:1993-07-01

摘要: 研究了LY11合金挤压淬火的温度-速度制度及其对型材力学性能、表面质量和晶间腐蚀的影响。结果表明,取较高挤压温度与合适的金属流出速度,在保证型材质量的同时,可获得与普通淬火相当的力学性能。讲座了型材挤压淬火的强化本质,指出空位和高密度位错的亚结构对挤压淬火因固溶不充分带来的强度损失有重要补偿作用。

关键词: 显微组织, 硬铝, 自然时效

Abstract: The effect of extrusion temperature and speed on mechanical properties, surface quality and intergranular corrosion of extruded LY11 duralumin sections has been studied. The mechanical properties obtained under the conditions of higher extruding temperature and suitable flow speed were comparable to that of usual quenching process, while the surface quality desired was retained. The strengthening mechanism of this alloy quenched on extrusion press was also discussed. The strength decrease caused by the uncomplete solid solution in this process was compensated by the strength increase led by the appearance of vacancy sites and the substructure with high dislocation density.

Key words: Duralumin, Microstructure, Nature aging