变质温度对ZL114A合金组织和性能的影响

胥晓强; 董立新; 刘力菱; 吴成辉; 魏善涛

doi:10.15980/j.tzzz.2018.05.029

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变质温度对ZL114A合金组织和性能的影响
Influences of Modification Temperature on Microstructures and Properties of ZL114A Alloy
2018年38卷第5期页码：568-571
纸质出版日期： 2018 ，
DOI： 10.15980/j.tzzz.2018.05.029

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[1]胥晓强,董立新,刘力菱,吴成辉,魏善涛.变质温度对ZL114A合金组织和性能的影响[J].特种铸造及有色合金,2018,38(05):568-571.

Xu Xiaoqiang, Dong Lixin, Liu Liling, et al. Influences of Modification Temperature on Microstructures and Properties of ZL114A Alloy[J]. Special Casting & Nonferrous Alloys, 2018,38(5):568-571.
[1]胥晓强,董立新,刘力菱,吴成辉,魏善涛.变质温度对ZL114A合金组织和性能的影响[J].特种铸造及有色合金,2018,38(05):568-571. DOI： 10.15980/j.tzzz.2018.05.029.

Xu Xiaoqiang, Dong Lixin, Liu Liling, et al. Influences of Modification Temperature on Microstructures and Properties of ZL114A Alloy[J]. Special Casting & Nonferrous Alloys, 2018,38(5):568-571. DOI： 10.15980/j.tzzz.2018.05.029.

摘要

采用K2ZrF6作为变质剂对ZL114A合金进行变质处理

研究了变质温度对ZL114A合金的显微组织和拉伸性能的影响。结果表明

随着变质温度提高

变质效果先升高后降低

当变质温度为725℃时

变质效果最佳。此时

α-Al相大致呈等轴状

且晶粒尺寸较小

共晶Si多为细纤维状或短棒状

合金的屈服强度、抗拉强度和伸长率在铸态下分别为151MPa、176 MPa和4.3%

经T6热处理后分别提高到251 MPa、300 MPa和5.0%。

Abstract

K2 ZrF6 was used as modifiers for the modification treatment of ZL114 Aalloy

and influences of varied modification temperature on the microstructures and tensile properties of ZL114 Aalloy were investigated.The results show that

with the increase of modification temperature

the modification effect is increased firstly and then decreased

and the optimized modification temperature of ZL114 Aalloy is 725 ℃.Under the conditions

theα-Al phase exhibits the euiaxed structure with small grain size

and eutectic silicon phase presents mainly thin fibrous or short-rod.Meanwhile

the yield strength

tensile strength and elongation of as-cast ZL114 Aalloy reach 151 MPa

176 MPa and 4.3%

which are increased to 251 MPa

300 MPa and 5.0% after T6 heat treatment

respectively.