新型Fe-Cr-Ni耐热合金的应变诱导析出行为
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摘要
在Gleeble-3500热力模拟机上采用应力松弛法研究新型Fe-Cr-Ni耐热合金在600、650、700、750℃,压缩量为0.4的等温应变诱导析出行为。试验结果表明,材料的PTT曲线是典型的C曲线,并且存在一个最快的析出温度,在650℃左右。本材料奥氏体中主要有3种析出物,M23C6、NbC以及Laves-Fe2Nb相,纳米级的NbC是主要的析出强化相。
The isothermal strain-induced precipitation behavior of Fe-Cr-Ni heat-resistant alloy at temperature of600,650,700,and 750℃and compression of 0.4 on a Gleeble-3500 thermal mechanical simulator was studied by stress relaxation method.The experimental results show that the PTT curve of the material is a typical C curve,and the fastest precipitation temperature is about 650℃.There are three kinds of precipitates in austenite of this material,M23 C6,NbC and Laves-Fe2 Nb,and nanometer NbC is the main precipitation strengthening phase.
The isothermal strain-induced precipitation behavior of Fe-Cr-Ni heat-resistant alloy at temperature of600,650,700,and 750℃and compression of 0.4 on a Gleeble-3500 thermal mechanical simulator was studied by stress relaxation method.The experimental results show that the PTT curve of the material is a typical C curve,and the fastest precipitation temperature is about 650℃.There are three kinds of precipitates in austenite of this material,M23 C6,NbC and Laves-Fe2 Nb,and nanometer NbC is the main precipitation strengthening phase.
引文
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[3]罗锐,程晓农,徐桂芳,等.新型Fe-20Cr-30Ni-0.6Nb-2Al-Mo合金的热变形行为及本构模型[J].稀有金属,2017(2):132.(Luo R,Cheng X N,Xu G F,et al.Constitutive modeling for elevated temperature flow behavior offe-20Cr-30Ni-0.6Nb-2Al-Mo alloy[J].Rare metals,2017(2):132.)
[4]程晓农,戴起勋.奥氏体钢设计与控制[M].北京:国防工业出版社,2000.(Cheng X N,Dai Q X.Austenitic Steel Design and Control[M].Beijing:National Defense Industry Press,2005.)
[5]田仲良,包汉生,何西扣,等.700℃汽轮机转子用耐热合金的强化机理[J].钢铁研究学报,2015,27(9):1.(Tian Z L,Bao H S,He X K,et al.Strengthening mechanisms of heat resistant alloys used for turbine rotor working at 700℃[J].Journal of Iron and Steel Research,2015,27(9):1.)
[6] Yang S,Ling X,Zheng Y.Creep behaviors evaluation of Incoloy 800Hby small punch creep test[J].Materials Science and Engineering,2017,685A:1.
[7]董毅,许云波,肖宝亮,等.含铌微合金钢低温区静态软化行为[J].钢铁研究学报,2009,21(8):17.(Dong Y,Xu Y B,Xiao B L,et al.Static softening behavior in low temperature area of Nb microalloyed steel[J].Journal of Iron and Steel Research,2009,21(8):17.)
[8]李红,罗海文,杨才福,等.奥氏体不锈钢的再结晶动力学[J].钢铁研究学报,2008,20(9):32.(Li H,Luo H W,Yang C F,et al.Dynamic recrystallization kinetics in austenitic stainless steel[J].Journal of Iron and Steel Research,2008,20(9):32.)
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[11] Zhou D Q,Xu X Q,Mao H H,et al.Plastic flow behaviour in an alumina-forming austenitic stainless steel at elevated temperatures[J].Materials Science and Engineering,2014,594A(4):246.
[12] Christopher J,Choudhary B K.Constitutive modelling of stress-relaxation behaviour of tempered martensitic P91steel using sine hyperbolic rate law[J].Materials Chemistry and Physics,2018,205(2):442.
[13]刘明哲,苑少强,刘义,等.Mn-Mo-Nb-B低碳微合金钢的应变诱导析出[J].钢铁研究学报,2010,22(3):29.(Liu M Z,Yuan S Q,Liu Y,et al.Strain strain-induced precipitation in Mn-Mo-Nb-B low carbon microalloyed steel[J].Journal of Iron and Steel Research,2010,22(3):29.)
[14] Chen S W,Zhang C,Xia Z X,et al.Precipitation behavior of Fe2Nb Laves phase on grain boundaries in austenitic heat resistant steels[J].Materials Science and Engineering,2014,616A(616):183.
[15]臧华勋,肖学山,童潮山,等.新型耐蚀超级奥氏体不锈钢中的高温析出相[J].钢铁研究学报,2009,21(2):44.(Zang H X,Xiao X S,Tong C S,et al.High temperature precipitated phases of new corrosion-resistant super austeniticsteel[J].Journal of Iron and Steel Research,2009,21(2):44.)
[16]马翔,徐温崇.铌钒微合金化控轧钢的相分析[J].钢铁研究总院学报,1985,5(4):481.(Ma X,Xu W C.Phase analysis of Nb-V microalloyed control-rolled steel[J].Central Iron and Steel Research Institute Technical Bulletin,1985,5(4):481.)
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