超低碳钢冷轧薄板拉伸性能的影响因素

Influence Factors on Tension Properties of Ultra Low Carbon Cold Rolled Steel Sheet

应用AG-IS 100kN岛津电子万能试验机测试超低碳钢冷轧薄板的拉伸性能,分析了试验温度(-40～200℃)、轧制方向和试样厚度(0.27～0.35mm)对其拉伸性能的影响。研究结果表明:抗拉强度随着温度的升高先降低而又略有增加,在200℃时材料出现屈服平台,其强度为135 MPa。伸长率A值随着温度的升高先增加后降低,而后又有所增加。纵向试样的抗拉强度和伸长率值较横向试样的高5%～15%。0.27mm厚度试样的抗拉强度最高,伸长率最小,0.3mm厚度试样抗拉强度最小、伸长率最大。

An AG-IS 100kN electrical tensile machine was used to measure tensile properties of ultra low carbon steel cold rolled sheet.The effects of test temperature（-40-200 ℃）,rolling direction and specimen thickness（0.27-0.35 mm） on tensile properties were analyzed.Research result shows that an increase of temperature leads to the first decrease,then slightly increase in tensile strength,and the yield strength is 135 MPa at 200 ℃.Elongation after fracture A first increases,then decreases and increases with the increasing of temperature.The strength and elongation of longitudinal specimen was higher than that of transversal specimen 5%-15%.The strength of 0.27 mm thick specimen was the highest and its elongation was the lowest,then the strength of 0.30 mm thick specimen was the lowest and its elongation was the highest.