采用激光连接/超塑成形组合技术制造了GH4169合金三层板结构件,并分析了该合金板的超塑性及成形前后的微观组织.结果表明:超细晶GH4169板材具有良好的超塑性,在T=940℃,初始应变速率为=6.1×10-4s-1的条件下,延伸率达到368.2%,m值为0.39,超塑成形过程改善了焊缝显微组织并且提高了其力学性能,因此该方法适用于GH4169高温合金多层结构的制造.焊接工艺参数:频率32Hz,峰值功率4500W,脉宽3ms,焊速180mm/min;超塑成形工艺参数:温度Tf=960℃,压力Pf=4.2MPa,时间tf=130min.
参考文献
| [1] | 黄乾尧;李汉康.高温合金[M].北京:冶金工业出版社,2000:1-8. |
| [2] | OBLAK J M;PAUIONIS D F;DUVALL D S .Coherency strengthening in Ni-base alloys hardened by DO22 precipitates[J].Metallurgical Transactions (A),1974,5(01):143-153. |
| [3] | 李文澜.高温合金718SPF[J].航空制造工程,1997(01):28. |
| [4] | SMITH Gaylord D;FLOWER H Lee.Superplastic forming of alloy 718[J].Advanced Materials & Processes,1994(04):32-34. |
| [5] | 马龙翔;崔建忠;纪文海.高技术新材料要览[M].北京:中国科学技术出版社,1993:205-209. |
| [6] | 韩雪;夏惠;刘润广 等.GH4169合金超塑性挤压工艺的研究[J].会属成形工艺,1997,15(05):24-26. |
| [7] | YEH M S;CHUANG T H.Superplastic forming/brazing process for inconel 718 superalloy components[J].Welding Research Supplement,1997:197-200. |
| [8] | 韩文波,张凯锋,王国峰,王波.Inconel718合金扩散连接接头的组织与性能研究[J].材料科学与工艺,2005(03):308-311. |
| [9] | 王岩,林琳,邵文柱,甄良,张新梅.固溶处理对GH4169合金组织与性能的影响[J].材料热处理学报,2007(z1):176-179. |
| [10] | 李志远;钱乙余.先进连接方法[M].北京:机械工业出版社,2000:1-2. |
| [11] | LI Z Q;LI X H.The Application of SPF/DB combined with welding technologies[J].Materials Science Forum,2007(551-552):49-54. |
| [12] | <中国航空材料手册>编辑委员会.中国航空材料手册:第2卷变形高温合金铸造高温合金[M].北京:中国标准出版社,2002:323-359. |
| [13] | G.D. Janaki Ram;A. Venugopal Reddy;K. Prasad Rao .Microstructure and tensile properties of Inconel 718 pulsed Nd-YAG laser welds[J].Journal of Materials Processing Technology,2005(1):73-82. |
| [14] | MULLINS W W;SEKERKA R F .Stability of a planar interface during solidification of a dilute binary alloy[J].Journal of Applied Physics,1964,35(02):444-451. |
| [15] | THOMPSON R G .The relationship Between Grain Size and Microfissuring in Alloy 718[J].Welding Journal,1985,64(04):91-96. |
| [16] | GOBBI S;ZHANG Li;NORRIS J.High powder CO2 and Nd-YAG laser welding of wrought inconel 718[J].Journal of Material Processing Techology,1996(56):333-345. |
| [17] | Huang Y;Langdon TG .The evolution of delta-phase in a superplastic Inconel 718 alloy[J].Journal of Materials Science,2007(2):421-427. |
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