Connection Properties of 5A06/TC4 Joints Prepared by Squeeze Casting and Semi-solid Forging

Han Liuna; Chen Fuxiao; Han Fei; Chen Gang; Song Xiaoguo; Du Zhiming

doi:10.15980/j.tzzz.2018.09.009

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Connection Properties of 5A06/TC4 Joints Prepared by Squeeze Casting and Semi-solid Forging
Vol. 38, Issue 9, Pages: 960-964(2018)
Published： 2018 ，
DOI： 10.15980/j.tzzz.2018.09.009

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[1]韩柳娜,陈拂晓,韩飞,陈刚,宋晓国,杜之明.5A06/TC4挤压铸造和半固态锻造连接性能研究[J].特种铸造及有色合金,2018,38(09):960-964.

Han Liuna, Chen Fuxiao, Han Fei, et al. Connection Properties of 5A06/TC4 Joints Prepared by Squeeze Casting and Semi-solid Forging. [J]. Special Casting & Nonferrous Alloys 38(9):960-964(2018)
[1]韩柳娜,陈拂晓,韩飞,陈刚,宋晓国,杜之明.5A06/TC4挤压铸造和半固态锻造连接性能研究[J].特种铸造及有色合金,2018,38(09):960-964. DOI： 10.15980/j.tzzz.2018.09.009.

Han Liuna, Chen Fuxiao, Han Fei, et al. Connection Properties of 5A06/TC4 Joints Prepared by Squeeze Casting and Semi-solid Forging. [J]. Special Casting & Nonferrous Alloys 38(9):960-964(2018) DOI： 10.15980/j.tzzz.2018.09.009.

摘要

分别采用挤压铸造和半固态锻造将5A06铝合金与TC4钛合金连接成形

测试分析了接头的剪切强度和界面物相

并通过正交试验获得了最优方案。结果表明

优化后挤压铸造工艺参数:浇注温度为850℃

比压为300 MPa

保压时间为45s

其接头剪切强度平均值为34.55 MPa

800℃时

连接界面生成TiAl

相

850℃时

生成Ti

Al相导致剪切强度降低。优化后的半固态锻造工艺参数:铝合金坯料加热温度为625℃

保温时间为60min

比压为300 MPa

其接头剪切强度平均值为57.02 MPa

连接界面主要生成球状Ti基固溶体以及极少量Ti

Al相

未生成Al

Ti相

提高了接头剪切强度。

Abstract

5A06 aluminum alloy and TC4titanium alloy were connected by squeeze casting and semi-solid forging

respectively.The shearing strength and the interface phase of the joint were investigated

and the optimal scheme was obtained by orthogonal experiment.The results show that the optimized process parameters of squeeze casting are presented as follows:poured at 850℃

the applied specific pressure on metal of 300 MPa for 45s

where the average shearing strength of the formed joints reaches 34.55MPa.When the liquid metal is poured at 800℃

the TiAl

phase can be observed in connection interface

while poured at 850℃

the formation of Ti

Al leads to the decrease of shearing strength.The optimized process parameters for semi-solid thixotropic forging are presented as follows:the heating temperature of the billet at 625℃for 60min

the applied specific pressure on metal of 300MPa

where the average shearing strength of the formed joints reaches 57.02 MPa

and the joint interface can observe spherical Ti-based solid solution and a few Ti

Al and absence of Al

therefore

the shearing strength of the formed joint is improved.