MGH956合金 TIG 原位合金化焊接后焊缝中合金元素易烧损,强化颗粒易聚集,研究了一种热处理方法对焊缝的组织的影响.焊接填充材料的ωV ＝2．0％,热处理条件为700℃保温2 h 后空冷.焊缝热处理后,晶界上的偏聚明显减少,在晶粒内部生成更多的细小弥散分布的颗粒,EDS 分析主要为 YAlO 3、TiC和 TiN 颗粒,此外还有(Ti,V)C 复合颗粒,由于 VC比 TiC 与铁基的润湿角更小,复合颗粒与焊缝基体结合更好.通过原子探针分析,热处理后,焊缝中 Y 元素的偏聚减少,进而减少焊缝的气孔量,最终提高焊缝的性能.
It was easy for alloying elements and strengthening particles in MGH956 alloy to burning and aggrega-ting during TIG in -situ welding.In this paper,effects of heat treatment on MGH 956 alloys microstructure TIG in-situ alloying welded were studied.Filler material of ωV =2.0% was used in the welding process,heat preservation time was 2.0 h,temperature was 700 ℃,and then air cooling.After heat treated,the grain bound-ary aggregation was significantly reduced,more fine particles generated in the weld,which were mainly YA-lO 3 ,TiC and TiN particle demonstrated by EDS analysis,in addition,(Ti,V)C composite particles were fund. By atomic probe analysis,the segregation of element Y reduced,therefore the porosity of the weld were reduced after heat treatment,ultimately,performance of the joint was improved.
参考文献
| [1] | Ukai S.;Fujiwara M. .Perspective of ODS alloys application in nuclear environments[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2002(Pt.a):749-757. |
| [2] | Hoelzer DT;Bentley J;Sokolov MA;Miller MK;Odette GR;Alinger MJ .Influence of particle dispersions on the high-temperature strength of ferritic alloys[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2007(a):166-172. |
| [3] | Olier P;Bougault A;Alamo A et al.Effects of the form-ing processes and Y2 O 3 content on ODS-Eurofer mechani-cal properties[J].Journal of Nuclear Materials,2009,386-388:561-563. |
| [4] | Molian P A;Yang Y M;Patnaik P C et al.Laser weld-ing of oxide dispersion-strengthened alloy MA754[J].Journal of Materials Science,1992,27:2687-2694. |
| [5] | 淮军锋,郭万林,李天文,袁鸿,姜维.氧化物弥散强化高温合金MGH956的基本焊接性研究[J].材料工程,2008(09):52-55. |
| [6] | 田耘,郭万林,杨峥,淮军锋,柳光祖,李文林,李帅华.MGH956合金板材电子束焊和氩弧焊的接头组织与性能研究[J].航空材料学报,2011(04):33-38. |
| [7] | Ashok Kumar Srivastava;Karabi Das .Microstructural and mechanical characterization of in situ TiC and (Ti,W)C-reinforced high manganese austenitic steel matrix composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2009(1/2):1-6. |
| [8] | Das K.;Bandyopadhyay TK.;Das S. .A Review on the various synthesis routes of TiC reinforced ferrous based composites[J].Journal of Materials Science,2002(18):3881-3892. |
| [9] | Yisan Wang;Xinyuan Zhang;Guangting Zeng;Fengchun Li .In situ production of Fe-VC and Fe-TiC surface composites by cast-sintering[J].Composites, Part A. Applied science and manufacturing,2001(2):281-286. |
| [10] | R. Sepulveda;F. Arenas .TiC-VC-Co: a study on its sintering and microstructure[J].International Journal of Refractory Metals & Hard Materials,2001(4/6):389-396. |
| [11] | John C;Lippold;Damian J.Welding metallurgy and weldability of stainless steels[M].北京:中国机械出版社,2008 |
| [12] | 雷玉成,李猛刚,承龙.ODS合金TIG原位合金化焊接机理和接头性能[J].材料研究学报,2012(04):383-389. |
| [13] | Jiang Maofa;Wang Rong;Li Chunlong .Interfaction of rare earths and micro alloying elements Nb,V and Ti in steel[J].Chinese Rare Earths,2003,24(05):1-3. |
| [14] | Liang Yingjiao;Che Yinchang.Inorganic thermodynamic data sheet[M].沈阳:东北大学出版社,1993 |
| [15] | Wang Jing;Wang Yisan;Ding Yichao .Production of (Ti,V)C reinforced Fe matrix composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2007(0):75-79. |
| [16] | 朱运锋,叶金文,刘颖,朱军,马世卿,张蛟.（V,Ti）（C,N）固溶体粉末对WC-8％Co硬质合金性能的影响[J].功能材料,2013(15):2239-2243. |
| [17] | Lei Yucheng;Ren Wenjie;Xie Weifeng et al.Study on pores in TIG welding of oxide dispersion strengthened(ODS)alloy MGH956[J].Transactions of the China Welding Institution,2011,32(11):1-4. |
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