摘要:
某厂在开发IF钢铁素体区轧制工艺的过程中,发现在冷轧成品表面存在不同于常规轧制工艺的纵向细纹缺陷,结合大量的试验分析及文献研究,重点对产品的金相微观组织、产品力学性能规律进行研究分析,同时借助TR200粗糙度仪对产品表面粗糙度做了对比分析。通过比较不同工艺下的热轧板晶粒组织,发现并无明显差异,初步认为IF钢铁素体轧制产品的纵向细纹缺陷主要形成于冷轧退火过程,可能与铁素体轧制的成品板屈服强度偏低有关。对此,将退火温度调整了20℃左右,同时对热轧工艺做了优化,改善了IF钢成品板的组织和力学性能,后续生产跟踪证明纵向细纹缺陷消除,产品表面质量得到显著改善。
Abstract:
In the development of IF steel in ferrite rolling process,the fine longitudinal stripe defects had been observed on the surface of cold rolled product,and the defect is different from the conventional rolling process.In order to find the reason of causing this kind of defects and thereby solve the problem,extensive experimental analysis had been done,focusing on the microstructure and mechanical properties of the product,at the same time surface roughness measurement had been carried out on a TR200 roughness tester.Microstructural observation show there is no obvious differences in grain size of hot rolled plate,implies that fine longitudinal stripe defects of IF ferrite rolling products should be formed during cold rolling and annealing process,and might be due to the low yield strength of the finished coil. Therefore,the annealing temperature has been reduced by 20 ℃,while the hot rolling process had been optimized.The mechanics properties and microstructure of resulted IF steel coil had been improved accordingly,while the fine longitudinal stripe defects had been eliminated.
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