控冷工艺对建筑用管线钢显微组织及力学性能的影响

Influence of Controlled Cooling Process on Microstructure and Mechanical Properties of Pipeline Steel Used for Construction

通过改变控冷工艺条件,对低碳贝氏体X100钢的显微组织和力学性能进行了研究。结果表明:随着卷曲温度的降低和冷却速度的增加,粒状贝氏体组织转变为多边形铁素体或板条状贝氏体组织,使得钢板的屈服强度和抗拉强度逐渐增大,伸长率和冲击功不断减小。

The microstructure and mechanical properties of low carbon bainite X100 steel were studied by changing the controlled cooling technology conditions. The results show that, as curly temperature decreases and cooling rate increases,the granular bainite transforms into the polygon ferrite or lath-shaped bainite, which makes the yield strength and tensile strength increase, at the same time, elongation and impact energy continuously decrease.