超快速连续退火对低Si系Nb-Ti微合金化TRIP钢组织和力学性能的影响*

骆宗安, 刘纪源, 冯莹莹, 彭文

EFFECT OF ULTRA-FAST CONTINIOUS ANNEALING ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF LOW Si GRADE Nb-Ti MICROALLOYING TRIP STEEL

LUO Zongan, LIU Jiyuan, FENG Yingying, PENG Wen

表1 不同连续退火工艺下钢的力学性能及残余奥氏体含量

Table 1 Mechanical properties and volume fraction of retained austenite of the steel after different continuous annealing processes

Process RP0.2 MPa Rm MPa duniform % n Rp0.2/Rm Rm×δuniform MPa·% Volume fraction of retained austenite / % I 436 743 19.7 0.26 0.58 14637.1 4.46 II 358 682 19.6 0.25 0.52 13367.2 4.12 III 408 748 21.3 0.27 0.54 15932.4 4.02