锻压技术

燃气轮机用IN718高温合金改锻工艺

英文标题：Modified forging process of superalloy IN718 for gas turbine

单位：1. 中国第二重型机械集团德阳万航模锻有限责任公司 2. 重庆大学材料科学与工程学院先进模具智能制造重庆市重点实验室

分类号：TG316

出版年,卷(期):页码：2023,48(3):11-19

摘要：

为了探索IN718高温合金大型燃气轮机轮盘锻件的制造工艺及质量控制要点，采用VIM+VAR制备的Φ450 mm大规格IN718高温合金近铸锭，进行了不同变形温度、改锻火次及包套方式等热变形参数的改锻并制成锻件，经固溶+时效热处理后通过水浸法超声波检测、光学金相检验及室温拉伸试验等方法对锻件进行研究。试验结果表明：对于超大规格的IN718高温合金近铸锭材料，通过在1080～1010 ℃加热进行反复镦拔，可明显改善锻件上、下端面的变形量，降低超声波检测时的噪声水平，获得等轴细晶组织并消除δ相的方向性，锻件的综合力学性能最优；镦拔中应注意减少坯料与平砧的传热，避免出现少数未再结晶的、顺着变形方向被拉长的扁长晶粒。

In order to explore the manufacturing process and quality control points of superalloy IN718 for large gas turbine disk forgings, Φ450 mm large size superalloy IN718 near-cast ingot which was manufactured by VIM+VAR was forged with different thermal deformation parameters such as deformation temperature, forging times and sheathing methods and made into forgings. After solution+aging heat treatment, the forgings were studied by water immersion ultrasonic detection, optical metallographic examination and tensile test at room temperature. The test results show that for the ultra-sized superalloy IN718 near-cast ingot material, repeated upsetting and pulling by heating at 1080-1010 ℃ can significantly improve the deformation of upper and lower end faces of forgings, reduce the noise level during ultrasonic testing, obtain an equiaxed fine-grain structure and eliminate directionality of the δ phase, and the comprehensive mechanical properties of the forgings are the best. During upsetting and pulling, attention should be paid to reducing the heat transfer between blank and flat anvil, and avoiding the appearance of individual unrecrystallized and elongated crystals along the deformation direction.

基金项目：

作者简介：刘洋（1987-），男，硕士，高级工程师 E-mail：229212501@qq.com 通信作者：孙朝远（1986-），男，博士研究生，高级工程师 E-mail：cysun316@163.com

参考文献：

[1]庄景云, 杜金辉,邓群，等.变形高温合金GH4169[M].北京:冶金工业出版社,2006.

Zhuang J Y, Du J H, Deng Q, et al.Wrought Superalloy GH4169[M].Beijing: Metallurgical Industry Press,2006.

[2]黄乾尧, 李汉康,等.高温合金[M].北京:冶金工业出版社,2000.

Huang Q Y, Li H K, et al.Superalloy[M].Beijing: Metallurgical Industry Press, 2000.

[3]江和甫. 对涡轮盘材料的需求及展望[J].燃气涡轮试验与研究,2002，(4):1-6.

Jiang H F.Requirements and forecast of turbine disk materials[J].Gas Turbine Experiment and Research, 2002，(4):1-6.

[4]郭鸿镇. 合金钢与有色合金锻造[M].西安:西北工业大学出版社,2009.

Guo H Z. Alloy Steel and Nonferrous Alloy Forging[M]. Xi′an: Northwest University of Technology Press,2009.

[5]曹国鑫, 张麦仓,董建新,等.Nb含量对GH4169合金钢锭凝固及均匀化过程相演化规律的影响[J].稀有金属材料与工程,2014,43(1):103-108.

Cao G X,Zhang M C,Dong J X,et al. Effect of Nb content variations on precipitates evolution of GH4169 ingots during their solidification and homogenization processes[J]. Rare Metal Materials and Engineering,2014,43(1):103-108.

[6]张麦仓, 郑磊,姚志浩,等.Nb含量对GH4169合金钢锭偏析规律的影响[J].热加工工艺,2013,42(10):45-49.

Zhang M C, Zheng L, Yao Z H, et al. Effect of Nb content on micro-segregation evolution of GH4169 ingots [J]. Hot Working Technology,2013,42(10):45-49.

[7]蒋洪德, 任静,李雪英,等.重型燃气轮机现状与发展趋势[J].中国电机工程学报,2014,34(29):5096-5102.

Jiang H D,Ren J,Li X Y, et al. Status and development trend of the heavy duty gas turbine[J]. Proceedings of the CSEE, 2014,34(29):5096-5102.

[8]杨功显, 张琼元,高振桓,等. 重型燃气轮机热端部件材料发展现状及趋势[J]. 航空动力,2019,(2):70-73.

Yang G X,Zhang Q Y,Gao Z H, et al. Developing status and trends of hot component materials for heavy gas turbines[J]. Aerospace Power,2019,(2):70-73.

[9]张慧, 江河,董建新.重型燃气轮机燃烧室用高温合金研究进展[J].兵器材料科学与工程,2021,44(6):148-156.

Zhang H, Jiang H, Dong J X. Research progress of superalloys for heavy duty gas turbine combustor[J]. Ordnance Material Science and Engineering,2021,44(6):148-156.

[10]马天军, 金鑫,赵玉才,等.研制直径2000 mm超大型高温合金涡轮盘的新技术[J].宝钢技术,2005,(5):50-54.

Ma T J, Jin X, Zhao Y C, et al. A new technology for development of Φ2000 mm extra-large turbine disk made of superalloy [J]. Baosteel Technology, 2005,(5):50-54.

[11]徐彦霖, 王增勇,黄振翅.奥氏体不锈钢平均晶粒尺寸的超声评价技术[J].无损检测,2001,(6):246-248.

Xu Y L,Wang Z Y,Huang Z C. Ultrasonic evaluation of the average grain size of austenitic stainless steel [J]. Nondestructive Testing,2001,(6):246-248.

[12]刘东, 罗子健. GH4169合金锻件的混晶组织[J].热加工工艺, 2004, 33(9): 3-5.

Liu D, Luo Z J. Mixed grain structure of GH4169 alloy forgings[J]. Hot Working Technology, 2004, 33(9): 3-5.

[13]Bond B J, O′Brien C M, Russell J L, et al. René 65 billet material for forged turbine components [A]. 8th International Symposium on Superalloy 718 and Derivatives [C]. Pittsburgh: TMS,2014.

[14]Valitov V A. Formation of nanocrystalline structure upon severe thermomechanical processing and its effect on the superplastic properties of nickel base alloys [A]. 8th International Symposium on Superalloy 718 and Derivatives [C]. Pittsburgh: TMS,2014.

[15]杜金辉, 邓群,曲敬龙,等.GH4169合金盘锻件制备技术发展趋势[J].钢铁研究学报,2011,23(S2):130-133.

Du J H, Deng Q, Qu J L, et al. Development trend of GH4169 alloy disk forging preparation technology[J]. Journal of Iron and Steel Research,2011,23(S2):130-133.

[16]王岩, 邵文柱,甄良.GH4169合金δ相的溶解行为及对变形机制的影响[J].中国有色金属学报,2011,21(2):341-349.

Wang Y, Shao W Z,Zhen L. Dissolution behavior of δ phase and its effects on deformation mechanism of GH4169 alloy[J]. The Chinese Journal of Nonferrous Metals,2011,21(2):341-349.

[17]Yuan H, Liu W C.Effect of the δ phase on the hot deformation behavior of Inconel 718[J]. Materials Science & Engineering A, 2005,408(1): 281-289.

[18]Thomas A,EI-Wahabi M,Cabrera J M,et al.High tempera-ture deformation of Inconel 718[J].J. Mater. Process Techn．,2006,177: 469-472.

[19]Kuo C M,Yang Y T, Bor H Y,er al. Aging Effects on the microstructure and creep behavior of Inconel 718 superalloy[J]. Materials Science & Engineering A,2009,510-511:289-294.

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