热处理对DT300低合金超高强度钢组织和性能的影响  

Effect of Heat Treatment on Structure and Properties of Low Alloying Ultra-high Strength Steel DT300

作　　者：赵磊[1] 刘宪民[2] 雍岐龙[1] 王春旭[2] 

机构地区：[1]昆明理工大学材料与冶金学院,昆明650093 [2]钢铁研究总院结构材料研究所,北京100081

出　　处：《特殊钢》2007年第2期29-30,共2页Special Steel

摘　　要：试验和分析了840-960℃油淬的DT300钢(％:0．33C、1．78Si、0．76Mn、5．78Ni、1．10Cr、0．65Mo、0．12V)的马氏体转变和ε-碳化物的析出以及淬火温度对300℃回火后钢的机械性能的影响。结果表明,DT300钢经860-920℃1 h油淬+300℃2 h回火可获得较完全的板条马氏体和优良的强韧性(Rm 1 860 MPa,Rp0.2 1 500 MPa,A 12％,AKU2 58 J)。Martensite transformation and ε- carbide precipitation in the steel DT300 - 0.33C, 1.78Si, 0. 76Mn, 5.78Ni, 1.10Cr, 0. 65Mo, 0. 12V oil quenched at 840 -960 ℃ and effect of quenching temperature on mechanical properties of 300 ℃ tempered steel have been tested and analyzed. Results showed that complete lath martensite and excellent strength-toughness of steel DT300 were obtained by 860 - 920 ℃ 1 h oil coNNing ＋ 300 ℃ 2 h tempering. The mechanical properties of heat treated steel were Rm 1 860 MPa, Rpo.21 500 MPa, A 12% and AKU2 58 J.

关 键 词：DT300低合金超高强度钢 热处理 组织 力学性能 

分 类 号：TG335.11[金属学及工艺—金属压力加工]