利用四辊轧机对氢还原后的热轧带钢试样进行了5道次冷轧试验，采用扫描电镜对试样冷轧前后的表面形貌进行了跟踪观察，采用TR200型粗糙度测量仪测量了轧制前后试样的表面粗糙度轮廓，研究了不同轧辊表面粗糙度和润滑条件下试样表面形貌的演变规律。结果表明：还原后的热轧带钢试样再经过5道次冷轧，试样表面的大部分缺陷被压平，未被压平的缺陷转变为显微凹坑残留在轧件表面；随着轧制道次增多，轧件表面光洁度提高；干摩擦条件下，试样表面裂纹的压平程度比油润滑条件下更好，表面残留的显微凹坑少且浅，但辊痕相对较多。
A five-pass cold rolling experiment of steel strip after hydrogen reduction was performed on a 4-high mill. The surface morphologies of samples were observed by SEM and the surface roughness curves were measured by using a TR200 roughness meter before and after rolling deformation. The evolution rules of the sample surface morphology under different roll surface roughness and lubrication conditions were emphatically analyzed and discussed. The results showed that most of defects on the sample surface were roll-flattened after five-pass cold rolling, and the remains turned into mi-cro pits leaving on the sample surface. The surface smoothness increased with the increase of rolling passes. The cracks were easier to be roll-flattened and the residual defects were less and shallow on the sample surface but the roller marks were relatively more under the condition of dry friction than under the condition of oil lubrication.
参考文献
| [1] | A. Primavera;S. Cattarino;M. Pavlicevic .Influence of process parameters on scale reduction with H_2[J].Ironmaking & Steelmaking: Products and applications,2007(4):290-294. |
| [2] | 戴杰涛,李湘文,喻峰,彭敏.带材无酸除鳞系统的开发及其在750 mm不锈钢生产线的应用[J].中国冶金,2013(06):50-54. |
| [3] | Samways N L.Strong Competitor With Traditional Pickling Pro-cess-Hydrogen Reduction Scale Removal Process[J].World Iron and Steel,2002(02):47. |
| [4] | 石杰,王德仁,何业东,齐慧滨.用CO还原BRC3热轧带钢表面氧化铁皮的研究[J].钢铁,2008(05):89-92. |
| [5] | Shi Jie;Wang De-ren;He Ye-dong;Qi Hui-bin;Wei Gao .Reduction of oxide scale on hot-rolled strip steels by carbon monoxide[J].Materials Letters,2008(20):3500-3502. |
| [6] | 庞建明,郭培民,赵沛,曹朝真,张殿伟.低温下氢气还原氧化铁的动力学研究[J].钢铁,2008(07):7-11. |
| [7] | 庞建明,郭培民,赵沛,曹朝真.氢气还原氧化铁动力学的非等温热重方法研究[J].钢铁,2009(02):11-14,19. |
| [8] | 赵沛,郭培民,张殿伟.低温非平衡条件下氧化铁还原顺序研究[J].钢铁,2006(08):12-15. |
| [9] | Xiao-jiang LIU,Guang-ming CAO,Yong-quan HE,Ming YANG,Zhen-yu LIU.Reduction of Oxide Scale with Hydrogen[J].钢铁研究学报（英文版）,2014(01):24-29. |
| [10] | 井玉安,于云蛟,李胜利.氮氢混合气氛下带钢表面氧化铁皮的还原[J].热加工工艺,2013(18):45-48,52. |
| [11] | 于云蛟,李胜利,井玉安,韩跃.氢气还原对热轧带钢表面形貌的影响[J].轧钢,2012(05):18-21. |
| [12] | Turkdogan E T;Vinters J V .Gaseous Reduction of Iron Oxides:PartⅠ.Reduction of Hematite in Hydrogen[J].Metallurgical Transactions,1971,2(11):3175. |
| [13] | Ahmed R;Sutcliffe M P F .Identification of Surface Features on Cold-Rolled Stainless Steel Strip[J].WEAR,2000,244(1/2):60. |
| [14] | Sutcliffe M P F;Georgiades F .Characterisation of Pit Geometry in Cold-Rol ed Stainless Steel Strip[J].WEAR,2002,253(9/10):963. |
| [15] | Le H R;Sutcliffe M P F .Analysis of Surface Roughness of Cold-Rolled Aluminium Foil[J].WEAR,2000,244(1/2):71. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%