锻压技术

卷取温度对低合金高强度钢组织性能的影响

英文标题：Effect of coiling temperature on the microstructure performance of low alloyed high strength steel

作者：张艳玲王守忠蒋桂芝

单位：商丘职业技术学院

分类号：TG142.1

出版年,卷(期):页码：2014,39(9):119-121

摘要：

为了研究Q420低合金高强度钢经轧制形变热处理后的组织和性能变化规律，按照不同的轧制试验规程以及2种不同的卷取温度580和630 ℃，采用轧控轧冷工艺进行轧制试验。试验结果表明: 2种卷取温度下钢的金相组织均为铁素体+粒状贝氏体;试验钢的屈服强度、硬度和抗拉强度随卷取温度的升高而降低;伸长率随卷取温度的升高而有所增大。当卷取温度为580 ℃时, 试验钢的金相组织较为细小均匀,试验钢的综合力学性能较佳。

According to different rolling procedures and two different kinds of coiling temperature 580 and 630 ℃,the rolling experiment was realized by cold rolling control method in order to study the changing regularities of microstructure and performance of the Q420 low alloyed high strength steel after rolling thermomechanical treatment. The experimental results show that the microstructure of the experimental steel is ferrite + granular bainite under the two kinds of coiling temperatures. The yield strength, hardness and tensile strength of the experimental steel decrease with the increase of the coiling temperature, while elongation increases. When the coiling temperature is 580 ℃, the microstructure of the experimental steel is relatively small and even, whose comprehensive mechanics performance is better.

基金项目：

河南省自然科学基金资助项目（1110054306）

张艳玲（1968-），女，学士，副教授

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