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40CrMnSiMoVA钢准贝氏体的疲劳性能

陈大明 , 康沫狂 , 谭若兵

金属学报

本文研究了飞机起落架用超高强度40CrMnSiMoVA钢的显微组织、强韧性和疲劳性能,结果表明,该钢经300℃等温1h淬火可获得由贝氏体铁素体板条与条间或条内的残余奥氏体薄膜所组成的准贝民体组织。与马氏体区等温淬火马氏体组织相比,准贝氏体具有更佳的强塑性,并具有缺口敏感性低,形变强化能力强,疲劳强度...

关键词: 超高强度钢 , meta-bainite , microstructure , fatigue property , null

CCT-DIAGRAMS OF Si-Mn-Mo BAINITIC STEELS

LIU Xiao ZHANG Mingxing CHEN Daming ZHOU Lubin KANG Mokuang Northwestern Polytechnical University , Xi'an , China LIU Xiao Faculty No.401 , Northwestern Polytechnical University , Xi'an 710072 , China

金属学报(英文版)

CCT-diagrams of Si-Mn-Mo bainitic steels have been determined.With Mo 0.25%,the high-temperature transformation of the steel shifts large to the right,and the bainitic trans- formation region becomes a“flat topped C-curve”at cooling rate in wide range.Si in the steel may cause shift of the bainitic ...

关键词: meta-bainite , null , null

超高强度钢中不同组织的疲劳超载效应

谭若兵 , 陈大明 , 康沫狂

材料研究学报

本文研究了超载对40CrMnsiMoVA 钢中准贝氏体组织和马氏体组织冲击疲劳裂纹起始寿命的影响。结果表明拉伸超载延长疲劳裂纹起始寿命N_i,N_i 与试样缺口根部的残余应变ε_R 之间呈以下经验关系:N_i=N_i~0exp(mε_R);压缩超载缩短N_i。准贝氏体组织的超载延寿效果明显地大于马氏...

关键词: 疲劳 , overload , meta-bainite

FATIGUE PROPERTIES OF META-BAINITE IN STEEL 40CrMnSiMoVA

CHEN Daming KANG Mokuang Northwestern Polytechnical University , Xi′an , ChinaTAN Ruobing Institute of Metal Research , Academia Sinica , Shenyang , China

金属学报(英文版)

The microstructure,strength,toughness and fatigue properties of an ultra-high strength steel 40CrMnSiMoVA have been investigated.The so-called meta-bainite,composed of thin re- tained austenite films within or between the bainitic ferrite lathes was found in the steel after isothermally quenched at ...

关键词: ultra-high strength steel , null , null , null

Si-Mn-Mo系贝氏体钢的CCT图

刘晓 , 张明星 , 陈大明 , 周鹿宾 , 康沫狂

金属学报

测定了五种Si-Mn—Mo系贝氏体钢的CCT曲线,在低Mo(<0.25%)的情形下该钢种的高温转变区大幅度右移,且贝氏体转变线在空冷冷速范围内具有扁平的特点在该钢种中,Si使贝氏体转变区右移,使先共析铁素体区左移Mn推迟高温转变区比推迟贝氏体转变区更为剧烈

关键词: 准贝氏体 , bainitic steel , CCT-curve

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