水平连铸BFe10-1-1铜合金坯  

Horizontal Continuous Casting BFe10-1-1 Alloy Billets

作　　者：阎志明[1,2] 李新涛[1,3] 罗大伟[1] 刘吉东[1] 张红亮[1] 曹志强[1,2] 李廷举[1,2] 

机构地区：[1]大连理工大学材料科学与工程学院 [2]大连理工大学三束材料改性国家重点实验室 [3]高新张铜股份有限公司

出　　处：《特种铸造及有色合金》2009年第2期187-189,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50274017)

摘　　要：探索了用水平连铸法生产83mm的BFe10-1-1铜合金铸坯的工艺。并对铸坯的表面质量、凝固组织及溶质元素的分布进行了分析。结果表明,采用该工艺制备出的铸坯外表面光滑,无明显振痕;铸坯宏观凝固组织边部为细小的柱状晶,内部为细小均匀的等轴晶;微观凝固组织从边部到心部,呈现出从致密具有明显方向性的树枝晶到等轴晶的演变;测定了溶质元素在铸坯径向的分布,结果显示存在一定程度的成分偏析,针对该情况,提出了有效的解决方法。BFe10-1-1 alloy billets with 83 mm in diameters were prepared by horizontal continuous casting.Surface quality,microstructure and solute distribution of the BFe10-1-1 billets were described.The results indicate that the prepared billets exhibit smooth surface quality without oscillation marks.Macro-structure of prepared billets is composed of fine columnar grain in the edge and uniformly fine equiaxed grain in internal area,while microstructure exhibits the evolution characteristics of dense dendrite with orientation into equiaxed grain from edge to internal area.In addition,there exists solute element segregation to some certain in radial distribution of the prepared billets,and related countermeasures were put forward.

关 键 词：水平连铸 BFe10—1—1铸坯 凝固组织 元素分布 

分 类 号：TG249.7[金属学及工艺—铸造] TG146.11[一般工业技术—材料科学与工程]