研究了热轧态690合金中碳化物的溶解和析出行为及其结构,结果表明:在热轧态合金中存在的碳化物多数沿晶界长条状分布,少量呈颗粒状分布于晶内,类型为M_(23)C_6.热轧态合金的晶界和晶内碳化物的完全同溶温度分别为1050℃、1080℃,在低同溶温度下未完全溶解的残余晶界碳化物直接导致后续TT处理晶界不再析出碳化物;将合金完全固溶处理后,在后续TT处理的晶界上会重新析出细小、半连续的碳化物.
The behavior of carbide dissolution and precipitation in hot-rolled Inconel690 has been investigated by means of scanning electron microscopy. Transmission electron microscopy was employed to determine the type of carbide. The results show that more strip like carbide precipitates, identified as M_(23)C_6, distribute along grain boundaries in hot-rolled alloy 690 bars, and only few discrete particles present in the matrix. Dissolution temperatures of intergranular and intragranular carbides are 1050 ℃ and 1080 ℃, respectively. The carbide particles in hot-rolled bar could not fully dissolve and some still existed at grain boundaries for low solution temperature, then these remained carbide particles really hindered the new carbide re-precipitation during the following thermal treatment at 715 ℃. However, to the clean grain boundaries after the carbides are fully dissolved at higher solution temperature, the newly fine and semi-continuous carbide precipitates can formed along the grain boundaries after following thermal treating.
参考文献
| [1] | G.S.Was,Grain boundary chemistry and intergranular fracture in austenitic nickel-base alloys-a review,Corro-sion,46(4),319(1990) |
| [2] | H.Nagano,K.Yomanaka,K.Kobayashi,M.Inoue,De-velopment and manufacturing system of alloy 690 for PWR steam generator tubing,Sumitomo Metals,40(4),17(1988) |
| [3] | J.M.Sarver,J.R.Crum,W.L.Mankins,Carbide precipita-tion and SCC behavior of Inconel alloy 690,Corrosion,44(5),288(1988) |
| [4] | J.J.Kai,M.N.Liu,Effect of heat treatment on the carbide evolution and the chromium depletion along grain bound-ary of Inconel 690 Alloy,Scripta Metallurgies,23(1),17(1989) |
| [5] | J.J.Kai,G.P.Yu,C.H.Tsai,M.N.Liu,S.C.Yao,The effects of heat treatment on the chromium evolution,precipitate evolution,and corrosion resistance of Inconel alloy 690,Metallurgy Transaction A,20,2057(1989) |
| [6] | LI Qiang,ZHOU Bangxin,A study of microstructure of alloy 690,Acta Metallurgica Sinica,37(1),8(2001)(李强,周邦新,690合金显微组织研究,金属学报,37(1),8(2001)) |
| [7] | ZHU Hong,DONG Jianxin,ZHANG Maicang,HU Yaohe,XIE Xishan,Solid-solution effect on microstructure of In-conel690 superalloy,Journal of University of Science and Technology Beijing,24(5),511(2002)(朱红,董建新,张麦仓,胡尧和,谢锡善,固溶处理对Incone1690合金组织的影响,北京科技大学学报,24(5),511(2002)) |
| [8] | LU Yue,QIN Xiubin,The influence of composition and heat treatment on microstructure and material properties of Sandvik Sanicro690(Alloy 690),Boiler Manufacturing,154(4),54(1994)(鲁悦,秦绪斌,化学成分合热处理对Sandvik公司690合金的微观结构及材料性能的影响,锅炉制造,154(4),54(1994)) |
| [9] | GAN Yong,TIAN Zhiling,DONG Hao,FEN Tiao,WANG Xinlin,China Materials Engineering Canon-Steel and Iron Materials Engineering (Beijing,Chemistry In-dustry Press,2006) p.490(干勇,田志凌,董瀚,冯涤,王新林,中国材料工程大典第二卷:钢铁材料工程(北京,化学工业出版社,2006),p.490) |
| [10] | LU Shiying,ZHANG Tingkai,KANG Xifan,YANG Changqiang,WANG Xi,Stainless Steels (Beijing,Atomic Energy Press,1995) p.173(陆世英,张廷凯,康喜范,杨长强,王熙,不锈钢(北京,原子能出版社,1995)p.173) |
| [11] | QIU Shaoyu,SU Xingwan,WEN Yan,YAN Fuguang,YU Yinhua,HE Yanchun,Effect of heat treatment on corro-sion resistance of alloy 690,Nuclear Power Engineering,16(4),336(1995)(邱绍宇,苏兴万,文燕,闰福广,喻应华,何艳春,热处理对690合金腐蚀性能影响的实验研究,核动力工程,16(4),336(1995)) |
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