研究了中碳钢钢液在凝固初期施加机械搅拌,改变搅拌参数对钢液凝固组织的影响。实验结果表明,随着搅拌时间的延长等轴晶比例增大,搅拌时间30 s时,等轴晶比例最大为50.784%;改变插入钢液深度,随着插入液面深度的增加,等轴晶区比例明显增大,同时晶粒得到细化,分布更均匀,插入深度为4.5 cm时,等轴晶比例和晶粒细化程度达到最优为30.866%;改变不同的搅拌速度时发现,搅拌速度越慢,等轴晶比例越大,搅拌速度为540 r/min时,试样凝固组织最好,等轴晶比例为50.784%。实验得到最优组合为搅拌时间30 s,插入深度4.5 cm,搅拌速度540 r/min,最优组合下得到的凝固组织等轴晶比例提高到62.618%。
The effect of various stirring parameters on the solidification structure of medium-carbon steel during the initial stage of solidification was studied in this paper.The results showed that with different stirring processing time,the macrostructure was refined and equiaxed crystal also increased,as well as columnar crystal reduced and the proportion of equiaxed grains enhanced with the increasing stirring time;by changing the depth inserted into liquid steel,it can be seen that the proportion of equiaxed crystal zone significantly increased,grain size was refined and distributed more evenly with the increase of insertion depth;By changing stirring rate,it was inferred that the slower the stirring rate,the larger the proportion of equiaxed grains.The mechanism of these phenomena were also analyzed.
参考文献
| [1] | 张西锋,袁守谦,谷坤文,魏颖娟,杨拉道,谢东钢.不同脉冲电压对45钢凝固组织的影响[J].铸造技术,2009(09):1125-1128. |
| [2] | 黄良余 .铝及其合金的晶粒细化处理简述[J].特种铸造及有色合金,1997,3:41-43. |
| [3] | Mats Johusson;Lennart Backerud;Sigworth G K .Study of mechanism of grain refinement of A1 after addition of Ti-and B-containing master alloys[J].Metallurgical and Materials Transactions A:Physical Metallurgy and Materials Science,1993,20A(02):481-491. |
| [4] | Dhindaw;Brij K.International Conference on Solidification Science and Processing:outlook for the 21st century[M].USA:Science Publishers,2001 |
| [5] | Campbell John.Modeling of casting,welding,and ad- vanced solidification processes VII[M].Minerals,Metals and Materials Society,1995 |
| [6] | 翟启杰,邢长虎,赵沛,于艳.微区成分扰动生核处理基础研究[J].钢铁,2002(06):39-41. |
| [7] | 李庆春.铸件形成理论基础[M].北京:机械工业出版社,1982 |
| [8] | 段海平,冯弘,赵清华.机械振动对Sn-Sb合金β相的影响[J].铸造技术,2004(09):686-688,690. |
| [9] | 大野笃美.金属凝固学[M].北京:机械工业出版社,1983:75-76. |
| [10] | 胡汉起.金属凝固[M].北京:冶金工业出版社,1985:307-326. |
| [11] | 周尧和;胡壮麒;介万奇.凝固技术[M].北京:机械工业出版社,1998:96-98. |
| [12] | 许广济,丁雨田.强烈机械搅拌对Al-Cu10%合金结晶方式的影响[J].甘肃工业大学学报,1994(02):46. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%