材料期刊网

冷轧薄板（带）被广泛应用于汽车、家电、搪瓷、易拉罐等行业，国家新标准（《冷轧低碳钢板及钢带》GBT5213-2008）中将其冲压级别分为DC01～DC07共6个级别。生产工艺而言，冷轧薄板（带）根据碳含量和冲压性能可分为低碳铝镇静钢（LCAK）、微碳钢（ELC）和超低碳钢（ULC）[1]，其中LCAK钢因其简洁的工艺、优良的性能、较低的成本在冷轧深冲钢市场一直占有相当大的份额。实践证明：传统流程生产低碳铝镇静钢过程中通过合理控制游离渗碳体形态、铁素体晶粒和AlN第二相粒子三个关键因素，可使冲压性能满足DC04的要求，达到微碳深冲钢的水平，具有显著的经济效益。本文通过传统流程冷轧薄板冲压开裂试样在金相、电镜、织构等方面的分析，对冲压开裂产生原因就整个生产工艺进行论述，总结了提高深冲性能的关键因素。

Colled-rolled steel sheet is widely used in automobiles, appliances, enamels and canses etc. The level of stamping were divided into 6 levels by national standard in China. From the technology of production, colled-rolled steel were seperated into low carbon Al-killed steel, micro-carbon steel and ultro-carbon steel according to the carbon content and stamping properties. For the simple process, high properties and low cost, the colled-rolled steel market share has been occupied considerably. Practice shows three critical factors, including free cementite, ferrite grain, aluminum nitride(AlN) nanoparticle, controlled reasonably in traditional process, that could satisfy the stamping requirement of DC04, up to micro-carbon stamping properties and make some economic benefits. Through the analysis of stamping cracking on microstructure, SEM, texture, This paper has enabled the cracking causes to discuss and summerized the key factors of high properties.