不同处理条件对建筑用高强钢组织及力学性能的影响

Influence of Treatment Conditions on Microstructure and Mechanical Properties of High Strength Steel Used for Architecture

以建筑用30Mn Si高强钢为对象,研究其在余热淬火和微合金化处理条件下组织与性能的变化规律。结果表明,经余热淬火处理后的6#钢具有最高的抗拉和屈服强度;1#、2#、5#和6#钢的疲劳断裂面存在明显的分层现象;经V微合金化后,试验钢的疲劳寿命提升,均大于5.00×106次,且抗拉强度和屈服强度有所提高。

Taking 30MnSi high strength steel used for architecture as research object, the microstructures and mechanical properties of the steel under the conditions of residual heat quenching or microalloying were analyzed. The results show that, after residual heat quenching, 6# steel has the highest tensile and yield strength; materials delamination are observed at fatigue fracture surfaces of 1#, 2#, 5# and 6# steels; after microalloying with V, 3# and 4#steel show an improved fatigue properties of average recycle more than 5.00×106 times with enhanced tensile and yield strength.