摘要
以建筑用1 000 MPa级低碳钢为研究对象,通过对其热模拟实验和显微组织观察,研究了不同轧制工艺参数对低碳钢金相组织和力学性能的影响。结果表明,当冷却速度小于1.0℃/s时,析出的贝氏体形状主要以粒状为主;当冷却速度大于5.0℃/s时,主要获得板条状贝氏体。通过一定的热处理后钢材的强度均可达到1 100 MPa以上,并且具有良好的韧塑性。
Taking 1 000 MPa grade low carbon steel used in construction as the research object, through tlaermal simulation experiments and microstructure observation on the material, the influence of cooling rate on the microstructures and mechanical properties of low carbon bainite steel was studied. The results show that, when the cooling speed is less than 1℃/s, the precipitated bainite in the steel mainly is granular microstructure. When increasing the cooling speed to 5 ℃/s, the dominate microstructure is plate strip bainite. After certain heat treatment, the strength of the steel can increase to 1100 MPa with good toughness.
出处
《铸造技术》
CAS
北大核心
2014年第6期1193-1195,共3页
Foundry Technology
关键词
低碳钢
贝氏体
冷却速度
金相组织
力学性能
low carbon steel
bainite
cooling rate
microstructure
mechanical properties
