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金属学报  1987, Vol. 23 Issue (2): 118-239    
  论文 本期目录 | 过刊浏览 |
LD2合金过饱和固溶体的形变热处理
郑炀曾;王玉林;刘德富
东北重型机械学院;东北重型机械学院;东北重型机械学院
THERMOMECHANICAL TREATMENT OF A SUPERSATURATED SOLID SOLUTION OF LD-2 ALUMINIUM ALLOY
ZHENG Yangzeng; WANG Yulin; LIU Defu (The Northeast Heavy Machinery Institute; Fulaerji; Heilongjiang) (Manuscript received 27 August; 1985; revised manuscript 17 April; 1986)
全文: PDF(1555 KB)  
摘要: 用扭转法研究了LD2合金过饱和固溶体的热变形、动态沉淀及其对合金时效行为的影响.结果表明过饱和固溶体的高温流变曲线为动回复型,Mg_2Si动态析出孕育期较无变形静态析出者至少短一个数量级.在不发生或仅发生少量细小Mg_2Si动态析出的条件下,热变形后立即淬火可缩短时效时间达一个数量级并提高硬化能力约15%.过饱和固溶体热变形淬火后的时效组织特征是存在着回复亚结构和较为细小弥散的过渡相。
Abstract:Hot torsion tests were carried out on supersaturated solid solution of an aluminium alloy containing 0.7% Mg and 0.97%Si. The flow curves at 480/400/ 270℃ and a strain rate of 1.31s~(-1) were measured. The dynamic structure changes and their influences on the subsequent aging behavior of the alloy quenched immediately after hot deformation were investigated. It has been found that the aginghardening ability and the time to the peak hardness of the supersaturated solid solution quenched directly after hot deformation are related to the dynamic precipitation of Mg_2Si. Under the conditions of absence or presence of a small amount of the precipitates, the ability is about 15% higher and the time is an order of magnitude shorter for the sample quenched immediately after deformation than for that quenched conventionally. The microstructure of the sample hot deformed, directly quenched and aged is charactrized by existence of recovery substructure as well as much finer dispersive aging precipitates.
收稿日期: 1987-02-18      出版日期: 1987-02-18

引用本文:

郑炀曾;王玉林;刘德富. LD2合金过饱和固溶体的形变热处理[J]. 金属学报, 1987, 23(2): 118-239.
ZHENG Yangzeng; WANG Yulin; LIU Defu (The Northeast Heavy Machinery Institute; Fulaerji; Heilongjiang) (Manuscript received 27 August; 1985; revised manuscript 17 April; 1986). THERMOMECHANICAL TREATMENT OF A SUPERSATURATED SOLID SOLUTION OF LD-2 ALUMINIUM ALLOY. Acta Metall Sin, 1987, 23(2): 118-239.

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http://www.ams.org.cn/CN/      或      http://www.ams.org.cn/CN/Y1987/V23/I2/118

1 Blade J C, Bryant A J, Thomas A T. Met Technol 1976; 3: 3802 邢广忠.硕士论文,东北重型机械学院,19823 Young C M, Sherby O D. In: Metal Forming: Interrelation Between Theory and Practice. New York: Plenum, 1971, 4294 Gardner K J, Grimes R. Met Sci 1979; 13:2165 王玉林,郑炀曾,刘德富.机械工程学报,1986;22:856 金子纯一.热处理,1981;21:331
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