摘要
与重力铸造AlSi10Mg合金相比,激光选区熔化成形过程中产生细小的晶粒,在α-Al基体中的粗大块状或针状Si相变为网格状且均匀分布。由于激光选区熔化成形过程中冷却速度较快,形成了过饱和固溶体,其抗拉强度、屈服强度和伸长率分别为483MPa、314MPa和6.43%。经T6处理后,均匀网络状的Si相发生溶解、断裂,并且聚集长大为圆整钝化的不规则形状,以及成细小弥散分布的Si相,合金的抗拉强度和屈服强度降低至208MPa、167MPa,伸长率提高至10.37%。
Compared with those in the gravity cast AlSi10Mg alloy,fine crystal grains are generated in the alloy during the laser selective melting forming process,and the coarse or needle-like Si phase in theα-Al matrix becomes mesh-like with uniform distribution.Due to the rapid cooling rate during the laser forming process,the supersaturated solid solution is formed,and the tensile strength,yield strength and elongation of the alloy reach 483 MPa,314 MPa and 6.43%,respectively.After T6 treatment,the uniform network-like Si phase is dissolved and broken to grow the irregularly shaped Si phase and the finely dispersed Si phase which are rounded and passivated,and the tensile strength and yield strength of the alloy are reduced to 208 MPa and 167 MPa,while the elongation is improved to 10.37%.
作者
闫成鑫
张惠帝
于宝义
李文芳
李卫荣
陈明
李润霞
Yan Chengxin;Zhang Huidi;Yu Baoyi;Li Wenfang;Li Weirong;Chen Ming;Li Runxia(School of Material Science and Engineering,Shenyang University of Technology;School of Materials Science and Engineering,Dongguan University of Technology;Dongguan Eontec Co.,Ltd.;Dongguan Bluebird Metal Materials Co.,Ltd.)
出处
《特种铸造及有色合金》
CAS
北大核心
2020年第2期160-164,共5页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(51674168)
国家重点研发计划资助项目(2018YFB1106003)
辽宁省教育厅重点资助项目(201724112)。
作者简介
第一作者:闫成鑫,男,1994年出生,硕士研究生,电话:15942008085,E-mail:645324066@qq.com;通信作者:李润霞,女,1971年出生,教授,电话:13624002022,E-mail:Runxiali@163.com。
