摘要
采用YK28-800型双动数控液压机研究了挤压温度及变形程度等工艺参数对4032铝合金挤压后显微组织和力学性能的影响。结果表明:挤压温度不变而变形程度增大时,初晶硅在基体上分布更细小均匀;当挤压温度高于350℃变形程度在25%～70%时,挤压变形后合金的抗拉强度变化不明显,而伸长率随变形程度的增加而提高,但在变形程度超过70%后伸长率明显下降;挤压变形温度为400℃时,变形后的合金可获得最大的伸长率和一定的抗拉强度。
YK28-800 double-action numerical press was used tO study the effects of extrusion temperature and deformation degree on mierostructure and mechanical property of 4032 A1 alloy. The results show that the primary silicon distributed more uniformly along with the increase of deformation degree at a certain extrusion temperature. The tensile strength of A1 alloy after extruded had less variation, but elongation improved with increase of deformation degree at the temperatures above 350 ℃ when deformation degree was arranged from 25%- 70%. However, elongation decreased obviously when the deformation degree was higher than 70%. The maximum of elongation with a certain tensile strength was obtained when extrusion temperature was 400 ℃ .
出处
《机械工程材料》
CAS
CSCD
北大核心
2012年第8期83-85,共3页
Materials For Mechanical Engineering
基金
国家自然科学基金资助项目(51105373)
材料成形与模具技术国家重点实验室资助项目(200908)
关键词
铝合金
热塑性变形
显微组织
力学性能
A1 alloy
hot extrusion
microstructure
mechanical property.
