Microstructure and Mechanical Properties of 6061 Aluminum Alloy Prepared by Casting-Forging Integrated Technology under Varied Forging-Starting Time

Peng Yong; Wang Shuncheng; Zheng Kaihong; Qi Wenjun; Chen Hexing; Zhou Haitao

doi:10.15980/j.tzzz.2013.12.017

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Microstructure and Mechanical Properties of 6061 Aluminum Alloy Prepared by Casting-Forging Integrated Technology under Varied Forging-Starting Time
Vol. 33, Issue 12, Pages: 1152-1157(2013)
Published： 2013 ，
DOI： 10.15980/j.tzzz.2013.12.017

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[1]彭勇,王顺成,郑开宏,戚文军,陈和兴,周海涛.启锻时间对铸锻复合成形6061合金组织和性能的影响[J].特种铸造及有色合金,2013,33(12):1152-1157.

Peng Yong, Wang Shuncheng, Zheng Kaihong, et al. Microstructure and Mechanical Properties of 6061 Aluminum Alloy Prepared by Casting-Forging Integrated Technology under Varied Forging-Starting Time. [J]. Special Casting & Nonferrous Alloys 33(12):1152-1157(2013)
[1]彭勇,王顺成,郑开宏,戚文军,陈和兴,周海涛.启锻时间对铸锻复合成形6061合金组织和性能的影响[J].特种铸造及有色合金,2013,33(12):1152-1157. DOI： 10.15980/j.tzzz.2013.12.017.

Peng Yong, Wang Shuncheng, Zheng Kaihong, et al. Microstructure and Mechanical Properties of 6061 Aluminum Alloy Prepared by Casting-Forging Integrated Technology under Varied Forging-Starting Time. [J]. Special Casting & Nonferrous Alloys 33(12):1152-1157(2013) DOI： 10.15980/j.tzzz.2013.12.017.

摘要

研究了启锻时间对铸锻复合一体化成形6061变形铝合金的组织和力学性能的影响。结果表明

不同启锻时间下铸坯靠近锻头处存在明显的流线变形组织

铸坯中间最后凝固部分组织则被压扁压实;当启锻时间为3

s时

施加的锻压力能有效对凝固铸坯进行压力补缩和组织密实并使其产生塑性变形

避免了缩孔、裂纹和组织疏松等缺陷出现;随着启锻时间的延长

热处理前后的铸锻件的抗拉强度和伸长率皆先增大然后趋于平缓减小

当启锻时间为4s时

抗拉强度分别达到211.1MPa和368.9MPa

伸长率则分别达到17.6%和11.5%。

Abstract

Microstructure and mechanical properties of 6061wrought aluminum alloy prepared by castingforging integrated technology at different forging-starting time were investigated.The results show that the streamline deformation structure at different forging-starting time can be observed in the parts near to the forged head

while the final solidification structure at the middle is flatted and compacted.With the forging-starting time of 3

the forging force can effectively exert pressure feeding

and make structure compact to eliminate the shrinkage

crack and loose structure.With the increase of forgingstarting time

the curves of the tensile strength and elongation for the alloy both before and after heattreatment are firstly increased remarkably

and then decreased gradually.Tensile strength of the alloy before and after heat treatment reaches 211.1MPa and 368.9MPa

respectively

and the elongation reaches 17.57%and 11.5%

respectively

at the forging-starting time of 4s.