热处理工艺对5mm 9Ni钢板性能的影响  

Effect of Heat Treatment Process on Properties of 9Ni Steel 5 mm Plate

作　　者：于雄 徐伟 刘洋 Yu Xiong;Xu Wei;Liu Yang(Research Institute,Jiangyin Xingcheng Special Steel Work Co Ltd,Jiangyin 214429)

机构地区：[1]江阴兴澄特种钢铁有限公司研究院,江阴214429

出　　处：《特殊钢》2021年第2期72-74,共3页Special Steel

基　　金：创新型产业集群培育计划专项资金(CYJQ201802)。

摘　　要：研究了淬火+亚温淬火+回火(QLT)、淬火+回火(QT)、正火+正火+回火(NNT)3种工艺对5 mm9Ni钢板低温韧性的影响。结果表明,采用NNT工艺,钢板低温韧性良好,逆变奥氏体含量8.0%;通过工艺试制,5mm 9Ni钢板,采用3.3 mm厚度规格试样,-196℃冲击吸收能量≥40 J;采用2.5 mm厚度规格试样,-196℃冲击吸收能量≥27 J。The effect of three kinds of process quenching+lamellarizing(quenching from intercritical temperature)+tempering(QLT),quenching+tempering(QT),double normalizing+tempering(NNT)on low temperature toughness of5 mm 9 Ni steel plate has been studied.The results show that the steel plate with NNT has good ductility at low temperature,good plate shape and 8.0%reverse austenite content by using double normalizing and tempering process.Through industrial trial production,the-196℃charpy absorption energy of 5 mm 9 Ni steel plate with 3.3 mm thickness specimen is≥40 J;and that with the 2.5 mm thickness specimen is≥27 J.

关 键 词：5 mm 9Ni钢板 逆变奥氏体 -196℃冲击吸收能量 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG156[金属学及工艺—金属材料]