Q＆P(淬火和分配)工艺对25Si2Ni3钢组织和力学性能的影响  

Effect of Quenching and Partitioning (Q&P) Process on Structure and Mechanical Properties of Steel 25Si2Ni3

作　　者：解西强[1,2] 高文涛[3] 时捷[2] 王存宇[2] 张方[1] 

机构地区：[1]昆明理工大学机电学院,昆明650093 [2]钢铁研究总院结构材料研究所,北京100081 [3]鞍山钢铁集团公司,鞍山114021

出　　处：《特殊钢》2008年第5期56-58,共3页Special Steel

摘　　要：对0.24C-1.72Si-2.96Ni钢进行Q&P处理:880℃15min-淬火至150～260℃(QT)5 min-300℃10 min油淬。结果表明,Q&P处理的钢为板条马氏体、残余奥氏体、孪晶马氏体和ε碳化物的复合组织;QT影响钢中马氏体量,随QT由150℃升高至260℃,钢的抗拉强度由1 580 MPa降至1 505 MPa,冲击功由45 J升至50 J。与传统淬-回火工艺相比,Q&P处理钢的抗拉强度降低25～100 MPa,冲击功提高5～8 J,伸长率没有明显变化。The Q＆P process： heating at 880 ℃ for 15 min - quenching to 150 -260 ℃ （QT） for 5 rain - heating to 300 ℃ for 10 min and oil cooling of steel 0. 24C-1.72Si-2.96Ni has been carried out. Results showed that the Q＆P treated steel had complicated structure consisting of lath martensite, retained austenite, twinned martensite and e-carbides ; the QT had influence on amount of martensite in steel, with increasing QT from 150 ℃ to 260 ℃ , the tensile strength of steel decreased from 1 580 MPa to 1 505 MPa, the impact energy of steel increased from 45 J to 50 J. As compared with traditional quenching-tempering process, the tensile strength of Q＆P treated steel decreased by 25 -100 MPa, the impact energy of Q＆P treated steel increased by 5 - 8 J, of which the elongation of steel hadn＇ t obvious change.

关 键 词：Q&P3X艺 力学性能 组织 

分 类 号：TG113[金属学及工艺—物理冶金]