文章信息/Info

Title:

Analysis of Microstructure-Properties and Process Optimization of Disk Forging of TC17 Alloy

文章編號:

1674-3962(2023)11-0918-06

作者:

魏鑫1; 李昌永1; 趙興東1; 徐建偉2; 曾衛東2

1. 中國航發沈陽黎明航空發動機有限責任公司，遼寧 沈陽 110043 2. 西北工業大學 凝固技術國家重點實驗室, 陜西 西安 710072

Author(s):

WEI Xin1;  LI Changyong1;  ZHAO Xingdong1;  XU Jianwei2;  ZENG Weidong2

1. AECC Shenyang Liming Aero-Engine Co., LTD., Shenyang 110043, China 2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China

關鍵詞:

TC17合金; 盤鍛件; 模擬; 微觀組織; 力學性能

Keywords:

TC17 alloy;  disk forging;  simulation;  microstructure;  mechanical property

分類號:

TG319

DOI:

10.7502/j.issn.1674-3962.202304022

文獻標志碼:

A

摘要:

為了提高發動機轉動盤件的服役性能，增加性能富裕度，對某發動機用TC17鈦合金盤鍛件原始固有方案的成形過程、微觀組織、力學性能進行分析，發現原始方案的預制坯設計不合理，導致盤鍛件的等效應變和組織分布不均勻，并使得盤鍛件的塑性和低周疲勞性能偏低。針對這一問題，采用有限元模擬進行預制坯結構優化，進一步提升盤鍛件的變形均勻性和組織性能水平。經優化后，鍛件變形的不均勻性得到明顯改善，而且鍛件各部位的組織分布均勻、形貌特征合理，原始β晶粒呈拉長狀，沒有或者有少量β再結晶晶粒、晶界彎折、晶內為網籃結構。力學性能測試結果表明，優化方案生產的盤鍛件的塑性和低周疲勞性能優于原始方案，而且優化后盤鍛件各部位的力學性能分散度較小、穩定性較好。

Abstract:

In order to improve the service performance and increase the performance richness of the engine rotating disc, the forming process, microstructure and mechanical properties of TC17 titanium alloy disc forging of the original process for an engine were analyzed. It was found that the preforming design of the original process was unreasonable, which led to the uneven distribution of the equivalent strain and microstructure of the disc forging. The ductility and low cycle fatigue properties of disc forgings were low. To solve this problem, finite element simulation was used to optimize the preforming structure, and the deformation uniformity and microstructure performance of disk forgings were further improved. After optimization, the uneven deformation of forgings is obviously improved, and the microstructure distribution of each part of the forgings is uniform and the morphology characteristics are better. The morphology characteristics are the elongated β grains, and there is no or few β recrystallized grains, grain boundary bending, basket�瞱aved structure inside grain. The results show that the ductility and low cycle fatigue properties of the disk forging of the optimized process are better than those of the original process, and the mechanical properties of each part of the optimized disc forgings have less dispersion and better stability.