| ECAP变形低碳钢的组织变化规律 | |
| 杜忠泽 ; 曹小芳 ; 符寒光 ; 王经涛 ; 赵西成 ; DU Zhongze ; CAO Xiaofang ; FU Hanguang ; WANG Jingtao ; ZHAO Xicheng | |
| 2010-06-08 ; 2010-06-08 | |
| 关键词 | ECAP 低碳钢 铁素体 晶粒细化 ECAP low carbon steel ferrite crystal grain refinement TG113.1 |
| 其他题名 | Structure transformation rule of ECAP-deformed low carbon steel |
| 中文摘要 | 采用每道次挤压后样品旋转90°进入下一道次且旋转方向不变方式(Bc)的等径弯曲通道变形(ECAP)工艺制备亚微晶Q235钢,并研究了4个面不同的组织演化．研究表明,ECAP变形 Q235钢的组织随变形道次的增加而细化,其中第1道次的细化程度最大．4个面的形貌也不同:S 面以位错胞为主;R面在第2道次出现变形带交叉现象;而T面2道次就有近似的等轴胞出现,4 道次出现了晶界很清楚的等轴晶,尺寸为0．25μm左右;L面4道次后也有等轴晶出现,但晶界没有T面4道次的晶界清楚．8道次后所有的面都已经演化成晶界清晰的等轴晶,尺寸为0．2μm左右．采用ECAP变形可以获得亚微晶Q235钢．; Subgrain and micrograin structures of Q235 steel were obtained by the process of equal channel angular pressing (ECAP) at room temperature with the route Bc that samples were rotated 90(and kept the direction unaltered after ECAP. The microstructure evolution of four surfaces was observed after ECAP deformation. It is shown that the microstructure of ECAP deforming Q235 steel is thinned with the increase of deformation pass, and the thinning degree of the first pass is the greatest. The appearances of four surfaces are different: Surface S is mainly dislocation cells; Surface R appears the cross of deforming bands in the second pass; there are equiaxed grains on Surface T after two passes, and the grain boundaries of equiaxed grains are very clear after four passes, with an average grain size of about 0.25 μm; On Surface L are equiaxed grains after four passes, and the grain boundaries are not clear. After eight passes, all surfaces are clear equiaxed grains, the average grain size is about 0.20 μm. The subgrain and micrograin structures of Q235 steel can obtain by means of ECAP.; 国家自然科学基金(No．59974018) 陕西省自然科学基金(No．2003E121) |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/47794]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 杜忠泽,曹小芳,符寒光,等. ECAP变形低碳钢的组织变化规律[J],2010, 2010. |
| APA | 杜忠泽.,曹小芳.,符寒光.,王经涛.,赵西成.,...&ZHAO Xicheng.(2010).ECAP变形低碳钢的组织变化规律.. |
| MLA | 杜忠泽,et al."ECAP变形低碳钢的组织变化规律".(2010). |
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