均匀化态GH3625合金热加工图及短流程热挤压管材研究
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摘要
在Gleeble-3800热模拟机上对均匀化态GH3625合金进行等温热压缩实验,研究了该合金在变形温度为800～1200℃、应变速率为0.01～10 s~(-1)条件下的热变形行为。利用动态材料模型建立了均匀化态GH3625合金的热加工图,然后基于热加工图在卧式挤压机上对均匀化态GH3625合金进行短流程热挤压管材试验,并验证了其可行性。研究表明,GH3625合金在热压缩变形过程中,加工硬化和动态再结晶软化共同发挥作用,使得真应力-真应变曲线呈典型的动态再结晶特征。加工图中的安全区为变形温度1150～1200℃、应变速率0.01～0.1 s~(-1),该区域的最大峰值效率为0.48。空心管坯在挤压温度为1150℃、挤压速度为50 mm/s和挤压比为7.4的条件下,成功挤压出规格为Φ43 mm×9.5 mm的GH3625合金荒管,其组织及力学性能接近于传统热挤压工艺制备的管材。
The isothermal compression experiments of homogenized GH3625 superalloy were carried out on a Gleeble-3800 thermal simulator, aiming at studying the hot deformation behavior of the alloy in the temperature range of 800—1200 ℃ and strain rate range of 0.01—10 s~(-1). The processing map of this alloy was established on the basis of dynamic material model, then the GH3625 superalloy seamless tube was manufactured by short-flow hot extrusion on a horizontal extruder according to the processing map, and its feasibility was verified. The results showed that the work-hardening and softening caused by dynamic recrystallization of GH3625 acted together in the process of thermal compression, which made the true stress-strain curves exhibited typical dynamic recrystallization characteristics. The safe region with maximum peak efficiency was 0.48, which could be observed in the processing map in the temperature range of 1150—1200 ℃ and strain rate range of 0.01—0.1 s~(-1). The GH3625 superalloy tube with size of Φ43 mm×9.5 mm had been successfully extruded from the hollow tube under the preheating temperature of 1150 ℃, fixed extrusion speed of 50 mm/s, and extrusion ratio of 7.4. The GH3625 tubes manufactured by short-flow hot extrusion presented similar microstructure and mechanical properties to the one prepared by traditional hot extrusion process.
The isothermal compression experiments of homogenized GH3625 superalloy were carried out on a Gleeble-3800 thermal simulator, aiming at studying the hot deformation behavior of the alloy in the temperature range of 800—1200 ℃ and strain rate range of 0.01—10 s~(-1). The processing map of this alloy was established on the basis of dynamic material model, then the GH3625 superalloy seamless tube was manufactured by short-flow hot extrusion on a horizontal extruder according to the processing map, and its feasibility was verified. The results showed that the work-hardening and softening caused by dynamic recrystallization of GH3625 acted together in the process of thermal compression, which made the true stress-strain curves exhibited typical dynamic recrystallization characteristics. The safe region with maximum peak efficiency was 0.48, which could be observed in the processing map in the temperature range of 1150—1200 ℃ and strain rate range of 0.01—0.1 s~(-1). The GH3625 superalloy tube with size of Φ43 mm×9.5 mm had been successfully extruded from the hollow tube under the preheating temperature of 1150 ℃, fixed extrusion speed of 50 mm/s, and extrusion ratio of 7.4. The GH3625 tubes manufactured by short-flow hot extrusion presented similar microstructure and mechanical properties to the one prepared by traditional hot extrusion process.
引文
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2 Guo J T.Materials science and engineering for superalloys,Science Press,China,2008 (in Chinese).郭建亭.高温合金材料学,科学出版社,2008.
3 China Aeronautical Materials Handbook Compile Committee.China aeronautical materials handbook,Standards Press of China,2002 (in Chinese).中国材料手册编委会.航空材料手册,中国标准出版社,2002.
4 Shi C X,Zhong Z Y.Fifty years development of superalloy in China,Me-tallurgical Industry Press,China,2006(in Chinese).师昌绪,仲增墉.中国高温合金五十年,冶金工业出版社,2006.
5 Wang Z T,Zhang S H,Cheng M,et al.Forging & Stamping Technology,2010,35(4),48 (in Chinese).王忠堂,张士宏,程明,等.锻压技术,2010,35(4),48.
6 Xu G H,Pei M Z,Yang Y J,et al.Hot Working Technology,2011,40(1),90 (in Chinese).胥国华,裴明哲,杨玉军,等.热加工工艺,2011,40(1),90.
7 Li D F,Wu Z G,Guo S L,et al.Rare Metal Materials and Engineering,2012,41(6),1026 (in Chinese).李德富,吾志岗,郭胜利,等.稀有金属材料与工程,2012,41(6),1026.
8 Tan Y B,Ma Y H,Zhao F.Journal of Alloys & Compounds,2018,741(4),85.
9 丁雨田,刘德学,胡勇,等.中国专利,CN105331913A,2016.
10 Wu Z G,Li D F.The Chinese Journal of Nonferrous Metals,2010,20(7),1321 (in Chinese).吾志岗,李德富.中国有色金属学报,2010,20(7),1321.
11 Yan S C,Cheng M,Zhang S H,et al.Chinese Journal of Materials Research,2010,24(3),239(in Chinese).闫士彩,程明,张士宏,等.材料研究学报,2010,24(3),239.
12 Tao L,Cheng M,Zhang W H,et al.Transactions of Materials and Heat Treatment,2012,33(9),55(in Chinese).陶琳,程明,张伟红,等.材料热处理学报,2012,33(9),55.
13 Guo Q M,Li D F,Peng H J,et al.Journal of University of Science and Technology Beijing,2011,33(5),587(in Chinese).郭青苗,李德富,彭海健,等.北京科技大学学报,2011,33(5),587.
14 Guo Q M,Li D F,Guo S L,et al.Journal of Nuclear Materials,2011,414(3),440.
15 Xie S Q.Foundry Technology,2015,36(3),611(in Chinese).谢淑卿.铸造技术,2015,36(3),611.
16 Dang L,Yang H,Guo L G,et al.Transactions of Nonferrous Metals So-ciety of China,2015,25(9),3037.
17 Wu Z G,Li D F,Guo S L,et al.Rare Metal Materials and Engineering,2012,41(2),235(in Chinese).吾志岗,李德富,郭胜利,等.稀有金属材料与工程,2012,41(2),235.
18 Guo Q M,Li H T,Li D F,et al.Chinese Journal of Rare Metals,2011,35(5),684 (in Chinese).郭青苗,李海涛,李德富,等.稀有金属,2011,35(5),684.
19 Doherty R D,Hughes D A,Humphreys F J,et al.Materials Science & Engineering A,1997,238(2),219.
20 Sakai T.Journal of Materials Processing Technology,1995,53(1),349.
21 Poliak E I,Jonas J J.Acta Materialia,1996,44(1),127.
22 Jiang H,Dong J X,Zhang M C,et al.Journal of Alloys & Compounds,2017,735(11),1520.
23 Zhang C,Zhang L,Shen W,et al.Journal of Alloys & Compounds,2017,728(9),1269.
24 Zeng W D,Zhou Y G,Zhou J,et al.Rare Metal Materials and Enginee-ring,2006,35(5),673 (in Chinese).曾卫东,周义刚,周军,等.稀有金属材料与工程,2006,35(5),673.
25 Prasad Y V R K.Journal of Materials Engineering & Performance,2003,12(6),638.
26 Ju Q,Li D G,Liu G Q.Acta Metallurgica Sinica,2006,42(2),218(in Chinese).鞠泉,李殿国,刘国权.金属学报,2006,42(2),218.
27 Ziegler H.Progress in solid mechanics,Wiley Press,USA,1963.
28 Prasad Y V R K,Gegel H L,Doraivelu S M,et al.Metallurgical Tran-sactions A,1984,15(10),1883.
29 Zhou H T,Liu Z C,Wen S F,et al.Rare Metal Materials and Enginee-ring,2012,41(11),1917 (in Chinese).周海涛,刘志超,温盛发,等.稀有金属材料与工程,2012,41(11),1917.
30 Guo Q M,Li D F,Guo S L,et al.Journal of Mechanical Engineering,2011,47(6),51 (in Chinese).郭青苗,李德富,郭胜利,等.机械工程学报,2011,47(6),51.
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32 Liu D X,Cheng X W,Ding Y T,et al.Journal of Wuhan University of Technology (Materials Science Edition),2016,31(6),1368.
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