固溶热处理对7136铝合金组织性能的影响

通过OM，SEM，DSC差热分析和室温拉伸性能测试，研究了固溶热处理对7136铝合金挤压板带组织及性能的影响。结果表明：挤压态合金中残留相以A1ZnMgCu四元相和Al2CuMg相为主；合金适宜的单级固溶温度为470℃，随固溶温度由450％升至480℃，残留相的尺寸及数量减少，再结晶比例增加；固溶温度达到475℃及以上，合金会发生过烧；经450℃／4h＋470℃／8h双级固溶后，合金在保持较低再结晶比例的同时残留相回溶较充分，合金T6态的抗拉强度、屈服强度和伸长率分别为701MPa，645MPa和12．2％；进一步提高温度对合金进行三级固溶处理，合金可以获得更理想的回溶效果，但易发生过烧。...

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Bibliographic Details
Published in航空材料学报 Vol. 34; no. 3; pp. 35 - 41
Main Author 孙文会 张永安 李锡武 李志辉 王峰 刘红伟 熊柏青
Format Journal Article
LanguageChinese
Published 北京有色金属研究总院有色金属材料制备加工国家重点实验室,北京,100088 2014
Subjects
7136铝合金
力学性能
固溶处理
显微组织
solution treatment
力学性能
显微组织
7136 aluminum alloy
microstructure
固溶处理
7136铝合金
mechanical properties
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ISSN1005-5053
DOI10.11868/j.issn.1005-5053.2014.3.006

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Summary:通过OM，SEM，DSC差热分析和室温拉伸性能测试，研究了固溶热处理对7136铝合金挤压板带组织及性能的影响。结果表明：挤压态合金中残留相以A1ZnMgCu四元相和Al2CuMg相为主；合金适宜的单级固溶温度为470℃，随固溶温度由450％升至480℃，残留相的尺寸及数量减少，再结晶比例增加；固溶温度达到475℃及以上，合金会发生过烧；经450℃／4h＋470℃／8h双级固溶后，合金在保持较低再结晶比例的同时残留相回溶较充分，合金T6态的抗拉强度、屈服强度和伸长率分别为701MPa，645MPa和12．2％；进一步提高温度对合金进行三级固溶处理，合金可以获得更理想的回溶效果，但易发生过烧。
Bibliography:7136 aluminum alloy; solution treatment; microstructure; mechanical properties
SUN Wen-hui, ZHANG Yong-an, LI Xi-wu, LI Zhi-hui, WANG Feng, LIU Hong-wei, XIONG Bai-qing （State Key Laboratory for Fabrication and Process of Nonferrous Metals, Central Research Institute for Nonferrous Metals, Beijing 100055, China）
11-3159/V
The effects of solution heat treatment on microstruetures and properties of 7136 aluminum alloy extrusions was studied by OM, SEM, DSC and room temperature tensile test. The results show that the main residual constituents in extrusions are T （AlZn- MgCu） and S（Al2CuMg） phase; The optimal single-step solution temperature is 470℃ ; The size and number of residual constituents reduced gradually when the temperature is from 450℃ to 480℃ , and the re-crystallized fraction continue increasing accordingly. When solution temperature reaches 475℃ or higher, overburning occurred. With 450℃/4h ＋ 470℃/8h solution treatment, the dissolution of residual constituents is relatively sufficient while re-crystal
ISSN:1005-5053
DOI:10.11868/j.issn.1005-5053.2014.3.006