第6期 江河等：700℃超超临界锅炉材料617B合金铸态组织及均匀化工艺 ·801· 压缩试验结果表明：经1210℃/48h均匀化处理后的 结晶过程的发生对细化晶粒、降低变形抗力以及提高 617B合金表现出良好的塑性；热变形过程中动态再 塑性也起到了积极作用. 图9经过均匀化后合金热压缩试样形貌，(a)1100℃：(b)1130℃：(c)1160℃：(d)1190℃ Fig.9 Morphologies of compression samples after homogenization:(a)1100℃：(b)1130℃；(e）1160℃：(d)1190℃ (b) (c) d 100m 100μm 1004m 100um 图10经过均匀化后617B合金的热变形组织(=0.1s).(a)1100℃：(b)1130℃：（©）1160℃：(d)1190℃ Fig.10 Hot working microstructures of617 B alloy after homogenization(&=0.1s-1):(a)1100℃：(b)1130℃：(e）1160℃；(d)1190℃ 综上所述，经双联工艺冶炼生产的617B合金 B]Lin FS,Cheng S C,Xie X S.The development of electric power 电渣锭存在枝晶偏析，Mo和T元素存在明显的正 and high temperature materials application in China:an overview 偏析，且铸态组织中存在较多复杂的共生碳化物. /The 5th Conference on Adrances in Material Technology for Fos- sil Power Plants,2007:46 经1210℃/48h均匀化处理后的617B合金晶内大 4]Bugge J,Kjaer S,Blum R.High-efficiency coal-fired power plants 块碳化物回溶，元素偏析消除，当变形速率为0.1s、 development and perspectives.Energy,2006,31(10/11)1437 变形量为30%时，在1100~1190℃范围内表现出良 [5]Ennis PJ,Czyrska-Filemonowiez A.Recent advances in creep-re- 好的可加工塑性 sistant steels for power plant applications.Sadhana,2003,28(3- 4):709 3结论 [6]Hosier J C,Tilack D J.Inconel alloy 617:a new high temperature alloy.Met Eng Q,1972,12(3):51 (1)采用双联工艺治炼生产的617B合金电渣 7]Wu Q,Song H,Swindeman R W,et al.Microstructure of long- 锭存在枝晶偏析，Mo和Ti元素的偏析最为严重， term aged IN617 Ni-base superalloy.Metall Mater Trans A,2008, 1/2半径处的一次枝晶间距最大：电渣锭组织的晶 39(11):2569 内存在较多的块状碳化物，表现为多种碳化物共生 [8] Tytko D,Choi PP,Klower J,et al.Microstructural evolution of a Ni-based superalloy (617B)at 700C studied by electron micros- 生长. copy and atom probe tomography.Acta Mater,2012.60(4): (2)运用残余偏析指数模型，根据枝晶间距和 1731 元素扩散系数，结合相图对617B合金的均匀化制 9]Takahashi T,Fujiwara J,Matsushima T,et al.Analysis of precip- 度进行预测，将均匀化制度确定为1210℃/48h.均 itated phase in heat treated Inconel alloy 617.Trans fron Steel Inst 匀化处理后的合金元素偏析基本消除，晶内碳化物 Jpm,1978,18(4):221 [10]Gariboldi E,Cabibbo M,Spigarelli S,et al.Investigation on 回溶.热模拟压缩试验表明该均匀化制度下的合金 precipitation phenomena of Ni22Cr-2CoMo alloy aged and 表现出良好的塑性. crept at high temperature.Int J Pressure Vessels Piping,2008,85 (112):63 参考文献 [11]Penkalla H J,Wosik J,Fischer W,et al.Structural investiga- [Viswanathan R,Purgert R,Goodstine S,et al.U.S.program on tions of candidate materials for turbine disc applications beyond materials technology for ultra-supereritical coal-fired boilers/The 700C /Proceedings of the International Symposium on Superal- 5th Conference on Adrances in Material Technology for Fossil Power loys and Various Derigatives,2001:279 Plants,2007:1 [12]Kihara S,Newkirk J B,Ohtomo A,et al.Morphological changes Fukuda M.Sone H.Saito E,et al.Refurbishment of aged PC of carbides during creep and their effects on the creep properties power plants with advanced USC technology/The 5th Conference of Inconel 617 at 1000 C.Metall Trans A,1980,11(6):1019 on Adrances in Material Technology for Fossil Power Plants,2007: 3] Emiliani M,Richman M,Brown R.Characterization of sputtered 29 Inconel 617.J Mater Sci,1990,25(1)137第 6 期 江 河等: 700 ℃超超临界锅炉材料 617B 合金铸态组织及均匀化工艺 压缩试验结果表明: 经1210 ℃ /48 h 均匀化处理后的 617B 合金表现出良好的塑性; 热变形过程中动态再 结晶过程的发生对细化晶粒、降低变形抗力以及提高 塑性也起到了积极作用． 图 9 经过均匀化后合金热压缩试样形貌． ( a) 1100 ℃ ; ( b) 1130 ℃ ; ( c) 1160 ℃ ; ( d) 1190 ℃ Fig． 9 Morphologies of compression samples after homogenization: ( a) 1100 ℃ ; ( b) 1130 ℃ ; ( c) 1160 ℃ ; ( d) 1190 ℃ 图 10 经过均匀化后 617B 合金的热变形组织( ε · = 0. 1 s － 1 ) ． ( a) 1100 ℃ ; ( b) 1130 ℃ ; ( c) 1160 ℃ ; ( d) 1190 ℃ Fig． 10 Hot working microstructures of 617B alloy after homogenization ( ε · = 0. 1 s － 1 ) : ( a) 1100 ℃ ; ( b) 1130 ℃ ; ( c) 1160 ℃ ; ( d) 1190 ℃ 综上所述，经双联工艺冶炼生产的 617B 合金 电渣锭存在枝晶偏析，Mo 和 Ti 元素存在明显的正 偏析，且铸态组织中存在较多复杂的共生碳化物． 经 1210 ℃ /48 h 均匀化处理后的 617B 合金晶内大 块碳化物回溶，元素偏析消除，当变形速率为 0. 1 s －1 、 变形量为 30% 时，在 1100 ～ 1190 ℃范围内表现出良 好的可加工塑性． 3 结论 ( 1) 采用双联工艺冶炼生产的 617B 合金电渣 锭存在枝晶偏析，Mo 和 Ti 元素的偏析最为严重， 1 /2 半径处的一次枝晶间距最大; 电渣锭组织的晶 内存在较多的块状碳化物，表现为多种碳化物共生 生长． ( 2) 运用残余偏析指数模型，根据枝晶间距和 元素扩散系数，结合相图对 617B 合金的均匀化制 度进行预测，将均匀化制度确定为 1210 ℃ /48 h． 均 匀化处理后的合金元素偏析基本消除，晶内碳化物 回溶． 热模拟压缩试验表明该均匀化制度下的合金 表现出良好的塑性． 参 考 文 献 ［1］ Viswanathan Ｒ，Purgert Ｒ，Goodstine S，et al． U． S． program on materials technology for ultra-supercritical coal-fired boilers / / The 5th Conference on Advances in Material Technology for Fossil Power Plants，2007: 1 ［2］ Fukuda M，Sone H，Saito E，et al． Ｒefurbishment of aged PC power plants with advanced USC technology / / The 5th Conference on Advances in Material Technology for Fossil Power Plants，2007: 29 ［3］ Lin F S，Cheng S C，Xie X S． The development of electric power and high temperature materials application in China: an overview / / The 5th Conference on Advances in Material Technology for Fos￾sil Power Plants，2007: 46 ［4］ Bugge J，Kjr S，Blum Ｒ． High-efficiency coal-fired power plants development and perspectives． Energy，2006，31( 10 /11) : 1437 ［5］ Ennis P J，Czyrska-Filemonowicz A． Ｒecent advances in creep-re￾sistant steels for power plant applications． Sadhana，2003，28( 3- 4) : 709 ［6］ Hosier J C，Tilack D J． Inconel alloy 617: a new high temperature alloy． Met Eng Q，1972，12( 3) : 51 ［7］ Wu Q，Song H，Swindeman Ｒ W，et al． Microstructure of long￾term aged IN617 Ni-base superalloy． Metall Mater Trans A，2008， 39( 11) : 2569 ［8］ Tytko D，Choi P P，Klwer J，et al． Microstructural evolution of a Ni-based superalloy ( 617B) at 700 ℃ studied by electron micros￾copy and atom probe tomography． Acta Mater，2012，60 ( 4 ) : 1731 ［9］ Takahashi T，Fujiwara J，Matsushima T，et al． Analysis of precip￾itated phase in heat treated Inconel alloy 617． Trans Iron Steel Inst Jpn，1978，18( 4) : 221 ［10］ Gariboldi E，Cabibbo M，Spigarelli S，et al． Investigation on precipitation phenomena of Ni-22Cr-12Co-9Mo alloy aged and crept at high temperature． Int J Pressure Vessels Piping，2008，85 ( 1 /2) : 63 ［11］ Penkalla H J，Wosik J，Fischer W，et al． Structural investiga￾tions of candidate materials for turbine disc applications beyond 700 ℃ / / Proceedings of the International Symposium on Superal￾loys and Various Derivatives，2001: 279 ［12］ Kihara S，Newkirk J B，Ohtomo A，et al． Morphological changes of carbides during creep and their effects on the creep properties of Inconel 617 at 1000 ℃ ． Metall Trans A，1980，11( 6) : 1019 ［13］ Emiliani M，Ｒichman M，Brown Ｒ． Characterization of sputtered Inconel 617． J Mater Sci，1990，25( 1) : 137 ·801·