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在低碳低锰钢中,有意加入较高含量(直至0.12％)的磷,可以明显改善冷轧和退火钢板的深冲性能,提高强度,国外已出现这类钢种,国内亦已研制成功,但十多年来,对磷的作用机理,并不清楚,各种解释,推测居多,未见发表可信的试验证据。对这种钢在形变和退火时的微观变化过程,亦研究不多。本文报导作者利用电子显微镜就这一问题进行研究所获得的结果,为优化钢的成分和工艺规范设计,提供了一定参考依据。一、热轧和冷轧试样,均观察到形变带及其内部胞结构,但亚结构细节二者有所不同。较精确地测定
In low-carbon and low-manganese steel, intentionally adding a high content (up to 0.12%) of phosphorus, can significantly improve the deep-drawing properties of cold-rolled and annealed steel, improve strength, such steel has emerged abroad, has also been successfully developed However, the mechanism of action on phosphorus has not been clear for more than a decade. Various explanations and conjectures are mostly found, and no credible experimental evidence has been published. This kind of steel in the deformation and annealing microscopic changes in the process, but also not much research. This article reports the results obtained by the authors using electron microscopy on this issue and provides some reference for optimizing the composition of steel and the process design. First, hot-rolled and cold-rolled specimens were observed with the deformation zone and its internal cellular structure, but the sub-structure details are different. More accurate determination