精密成形工程
精密成形工程
정밀성형공정
METAL FORMING TECHNOLOGY
2011年
3期
1-4,9
,共5页
朱世凤%王艳彬%陈嫚丽%赵志翔
硃世鳳%王豔彬%陳嫚麗%趙誌翔
주세봉%왕염빈%진만려%조지상
等径道角挤压%铸态镁合金%力学性能%微观组织
等徑道角擠壓%鑄態鎂閤金%力學性能%微觀組織
등경도각제압%주태미합금%역학성능%미관조직
研究了铸态AZ91D镁合金在等径角挤压(Equal Channel Angular Extrusion,ECAE)后的室温力学性能和微观组织特征.在力学性能方面,铸态AZ91D镁合金经过1道次ECAE变形后,室温力学性能(屈服强度、抗拉强度、延伸率、弹性模量)由86.3 MPa,146.3 MPa,1.84%,42.5 GPa分别提高到144.1 MPa,222.8 MPa,3.49%,47.7 GPa;2道次后变为109.1 MPa,268.3 MPa,4.48%,48.9 GPa.在微观组织方面,挤压1道次后,由于枝状晶粒在等径道弯角处滑动和转动时发生破碎,AZ91D镁合金的晶粒和黑色共晶相Mg17Al12沿挤压方向拉长为条带状;挤压2道次后,黑色共晶相开始部分回溶,共晶相有所减少且呈非连续分布.
研究瞭鑄態AZ91D鎂閤金在等徑角擠壓(Equal Channel Angular Extrusion,ECAE)後的室溫力學性能和微觀組織特徵.在力學性能方麵,鑄態AZ91D鎂閤金經過1道次ECAE變形後,室溫力學性能(屈服彊度、抗拉彊度、延伸率、彈性模量)由86.3 MPa,146.3 MPa,1.84%,42.5 GPa分彆提高到144.1 MPa,222.8 MPa,3.49%,47.7 GPa;2道次後變為109.1 MPa,268.3 MPa,4.48%,48.9 GPa.在微觀組織方麵,擠壓1道次後,由于枝狀晶粒在等徑道彎角處滑動和轉動時髮生破碎,AZ91D鎂閤金的晶粒和黑色共晶相Mg17Al12沿擠壓方嚮拉長為條帶狀;擠壓2道次後,黑色共晶相開始部分迴溶,共晶相有所減少且呈非連續分佈.
연구료주태AZ91D미합금재등경각제압(Equal Channel Angular Extrusion,ECAE)후적실온역학성능화미관조직특정.재역학성능방면,주태AZ91D미합금경과1도차ECAE변형후,실온역학성능(굴복강도、항랍강도、연신솔、탄성모량)유86.3 MPa,146.3 MPa,1.84%,42.5 GPa분별제고도144.1 MPa,222.8 MPa,3.49%,47.7 GPa;2도차후변위109.1 MPa,268.3 MPa,4.48%,48.9 GPa.재미관조직방면,제압1도차후,유우지상정립재등경도만각처활동화전동시발생파쇄,AZ91D미합금적정립화흑색공정상Mg17Al12연제압방향랍장위조대상;제압2도차후,흑색공정상개시부분회용,공정상유소감소차정비련속분포.
