东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (1): 42-45.DOI: 10.12068/j.issn.1005-3026.2017.01.009

• 材料与冶金 • 上一篇    下一篇

挤压比对低温挤压ZA15锌合金组织和力学性能的影响

孙世能, 王利卿, 任玉平, 秦高梧   

  1. (东北大学 材料各向异性与织构教育部重点实验室, 辽宁 沈阳110819)
  • 收稿日期:2015-09-10 修回日期:2015-09-10 出版日期:2017-01-15 发布日期:2017-01-13
  • 通讯作者: 孙世能
  • 作者简介:孙世能(1987-),男,辽宁大连人,东北大学博士研究生; 秦高梧(1970-),男,江苏盐城人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51525101,51371046); 教育部新世纪优秀人才支持计划项目(NECT-12-0109); 中央高校基本科研业务费专项资金资助项目(N130610002); 东北大学优秀博士学位论文培育项目A类.

Effects of Extrusion Ratio on Microstructure and Mechanical Property of ZA15 Zn Alloy Extruded at Lower Temperature

SUN Shi-neng, WANG Li-qing, REN Yu-ping, QIN Gao-wu   

  1. Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China.
  • Received:2015-09-10 Revised:2015-09-10 Online:2017-01-15 Published:2017-01-13
  • Contact: QIN Gao-wu
  • About author:-
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摘要: 利用拉伸试验和扫描电镜,研究了在150℃,挤压比对反向挤压ZA15锌合金的微观组织和力学性能的影响.结果表明:随着挤压比的增加,ZA15锌合金室温抗拉强度有所提高,但都在150MPa以下.其伸长率在160%~180%,具有室温超塑性.这主要是由于均匀化后形成的(α+η)片层共析组织经塑性变形后转变成以η相为基体,α相呈粒状弥散分布组织.这意味着采用低温常规挤压制备ZA15锌合金即可获得室温超塑性,同时,其力学性能也能够满足热喷涂ZA15锌合金线材的新标准要求.

关键词: ZA15锌合金, 挤压比, 显微组织, 力学性能, 反向挤压

Abstract: The effects of extrusion ratio on microstructures and mechanical properties of ZA15 Zn alloy extruded at 150℃ were investigated by microscopy and tensile test. The results showed that the tensile strength of the extruded ZA15 Zn alloy is improved with increasing of the extrusion ratio, but all are lower than 150MPa. And the tensile elongation remains about 160%~180%, which is the feature of room temperature superplasticity. This is mainly because the lamellar eutectoid microstructure composed of α+η phases formed by heat treatment is transformed into one consisting of the η matrix and small α phase particle with dispersive distribution through plastic deformation. It implies that the room temperature superplasticity can be obtained in the ZA15 Zn alloy manufactured by the common extrusion at lower temperatures, and the mechanical properties can be satisfied with the new standard of the ZA15 Zn alloy wire used to thermal spraying industry.

Key words: ZA15 Zn alloy, extrusion ratio, microstructure, mechanical property, backward extrusion

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