钛微合金化Q345E钢的试验研究

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基金项目:

湖北省自然科学基金创新群体项目资助（编号2008CDA010）。

Experimental Study on the Ti Microalloyed Q345E Steel

1. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China;
2. Liuzhou Iron & Steel Group Co. Ltd., Liuzhou 545002, Guangxi, China;
3. The 4th Branch of Steelmaking Works, Wuhan Iron and Steel Group Co., Wuhan 430083, Hubei, China;
4. Silicon Steel Division of Baosteel Co. Ltd., Shanghai 200941, China

摘要: 采用钛微合金化技术生产出具有较高屈服强度和良好低温冲击韧性的Q345E钢，其组织均以铁素体+珠光体+少量回火索氏体组成。缓冷和快冷试验结果表明钛微合金化Q345E具有较高的性能稳定性，强度增加主要是Ti细晶强化及沉淀强化作用引起的，研究为钛微合金化钢的进一步推广作了有益尝试。
- Q345E /
- 钛 /
- 微合金化钢 /
- 细晶强化
Abstract: The high performance Q345E steel with high yield strength and stable low-temperature impact toughness was made by Titanium microalloying technology.The microstructure of developed Q345E steel is composed of ferrite, pearlite and a little tempered sorbite.Slow cooling and fast cooling experimental results showed that titanium microalloyed Q345E steel has high performance stability, the increase of strength is caused mainly by grain-refining strengthening and precipitation strengthening.This research is a beneficial attempt for further promotion of titanium microalloyed steel.
- Q345E /
- titanium /
- microalloyed steel /
- fine-grain strengthening