文献类型：期刊文章

作　　者：毕胜[1] 运新兵[1] 裴久扬[1] 赵颖[1] 闫志勇[2] 张旭[2]

机构地区：[1]大连交通大学连续挤压教育部工程研究中心,大连116028 [2]大连康丰科技有限公司,大连116050

出　　处：《Transactions of Nonferrous Metals Society of China》

基　　金：Project(51175055)supported by the National Natural Science Foundation of China;Project(LR2015011)supported by Program for Liaoning Excellent Talents in University,China

年　　份：2017

卷　　号：27

期　　号：2

起止页码：305-311

语　　种：中文

收录情况：0、AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2017_2018、EBSCO、EI(收录号：20171103438417)、IC、INSPEC、JST、SCI-EXPANDED(收录号：WOS:000397268900008)、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：The microstructure evolution of Al–Sr master alloy during continuous extrusion was investigated using X-ray diffractometer, scanning electron microscope and transmission electron microscope. Results indicate that the continuous extrusion process could change the Al4Sr particles of the alloy significantly in size and morphology. The as-cast needle-like Al4Sr particles are broken into small blocks in upsetting zone and crushed heavily in adhesion zone. Plenty of dislocations get tangled up in right-angle bending zone. Al4Sr particles grow in the extending zone. Finally, Al4Sr particles in products are approximately 28 μm in length. Al2Sr particles precipitate during the process. Compared with products by horizontal extrusion, Al4Sr particles by continuous extrusion are finer and distribute more evenly.

关 键 词：Al-Sr master alloy  grain refiner  continuous extrusion  microstructure evolution  

分 类 号：TG379]