Al-12.4Si-4.5Cu合金挤压铸造工艺研究

张会

doi:10.15980/j.tzzz.2015.10.013

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Al-12.4Si-4.5Cu合金挤压铸造工艺研究
Squeezing Casting Al-12.4Si-4.5Cu Alloy
2015年35卷第10期页码：1051-1054
纸质出版日期： 2015 ，
DOI： 10.15980/j.tzzz.2015.10.013

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[1]张会.Al-12.4Si-4.5Cu合金挤压铸造工艺研究[J].特种铸造及有色合金,2015,35(10):1051-1054.

Zhang Hui. Squeezing Casting Al-12.4Si-4.5Cu Alloy[J]. Special Casting & Nonferrous Alloys, 2015,35(10):1051-1054.
[1]张会.Al-12.4Si-4.5Cu合金挤压铸造工艺研究[J].特种铸造及有色合金,2015,35(10):1051-1054. DOI： 10.15980/j.tzzz.2015.10.013.

Zhang Hui. Squeezing Casting Al-12.4Si-4.5Cu Alloy[J]. Special Casting & Nonferrous Alloys, 2015,35(10):1051-1054. DOI： 10.15980/j.tzzz.2015.10.013.

摘要

采用正交试验研究了浇注温度、挤压力、模具预热温度和保压时间等工艺参数对Al-Si-Cu合金的微观组织和力学性能的影响。在ZL102合金中加入纯Cu

得到成分为Al-12.4Si-4.5Cu合金

进行了正交试验。结果表明

与普通铸件相比

挤压铸件微观组织更加细小均匀

力学性能显著提高

但韧性有所降低。Al-12.4Si-4.5Cu合金的最佳工艺方案是

浇注温度为680℃

模具预热温度为200℃

压力为200kN

保压时间为14s。热处理后

抗拉强度比热处理前高了106.8MPa

硬度（HV）比热处理前高了20。

Abstract

Based on orthogonal testing

effects of processing parameters

such as pouring temperature

squeezing force

mould preheating temperature and holding pressure time

on microstructure of Al-12.4Si-4.5Cu alloy were investigated by SEM

tensile testing.The results reveal that compared with common castings

squeezing castings exhibit more fine and uniform microstructure with more excellent mechanical properties

however

the ductility and corrosion resistance are decreased.The optimized processing parameters for the squeezing casting Al-12.4Si-4.5Cu alloy are presented as follows:pouring at680 ℃

preheating mould at 200℃ with pressure for 200 kN for 14 s.After heat treatment

the tensile strength and hardness of the alloy are increased by 106.8MPa and 20

compared with those of one without heat treatment.