文章信息/Info

Title:

Study on the Evolution Behavior of Metallurgical Defects During Hot Working of GH4169 Alloy Disk Forgings

文章編號(hào):

1674-3962(2026)02-0168-11

作者:

楊若男; 謝明昭; 謝錦麗; 畢中南; 秦海龍; 高旸欽

1. 中國石油大學(xué)(北京)，北京 102249 2. 北京鋼研高納科技股份有限公司，北京 100081 3. 鋼鐵研究總院 高溫合金新材料北京市重點(diǎn)實(shí)驗(yàn)室，北京 100081

Author(s):

YANG Ruonan; XIE Mingzhao; XIE Jinli; BI Zhongnan; QIN Hailong; GAO Yangqin

1. China University of Petroleum (Beijing), Beijing 102249, China 2. Beijing GAONA Materials & Technology Co., Ltd., Beijing 100081, China 3. Beijing Key Laboratory of Advanced High Temperature Materials, Central Iron and Steel Research Institute,Beijing 100081, China

關(guān)鍵詞:

GH4169合金; 白斑; 超聲波探傷; 演化行為

Keywords:

GH4169 alloy;  white spots;  ultrasonic flaw detection;  evolutionary behavior

分類號(hào):

TG132.3

DOI:

10.7502/j.issn.1674-3962.202501022

文獻(xiàn)標(biāo)志碼:

A

摘要:

白斑等冶金缺陷的分布特性和尺寸是影響輪盤服役穩(wěn)定性的關(guān)鍵因素。采用超聲波探傷、切割取樣觀察和有限元模擬等方法，對(duì)GH4169合金棒材中預(yù)置白斑的化學(xué)成分和組織形貌進(jìn)行了表征，在此基礎(chǔ)上探究了熱加工過程中冶金缺陷的演化規(guī)律。研究發(fā)現(xiàn)，與常規(guī)GH4169合金棒材/盤件對(duì)比，白斑的化學(xué)成分無明顯差異，主要差異集中在Nb元素的含量（質(zhì)量分?jǐn)?shù)），白斑中為4.5%，對(duì)比標(biāo)準(zhǔn)相差1%；白斑晶粒尺寸明顯大于常規(guī)組織，尺寸為50 μm，是正常組織的5倍。白斑易出現(xiàn)在棒材芯部位置，外緣產(chǎn)生的概率最小，僅為7%。在盤鍛件熱加工過程中，棒材芯部、1/2R、外緣的白斑分別遺留至盤件輪轂、輪輻和輪緣。研究結(jié)果可為實(shí)際生產(chǎn)過程中控制盤鍛件內(nèi)部缺陷尺寸及預(yù)測缺陷轉(zhuǎn)移位置提供理論和實(shí)驗(yàn)支撐。

Abstract:

The distribution characteristics and dimensions of metallurgical defects such as white spots are the key factors affecting the service stability of the wheel. In this study, white spots were preset in GH4169 alloy bars. Then the chemical composition and tissue morphology of the preset white spots were characterized by ultrasonic flaw detection and cutting sample observation, respectively. On this basis, the evolution law of metallurgical defects during thermal processing was investigated by combining with finite element simulation. The final study found no significant difference in the chemical composition of the white spots compared with the conventional GH4169 alloy bars/coils, and the main difference is focused on the content of Nb elements. The Nb element in the white spots is 4.5wt%, with a deviation of 1wt% from the standard value. In addition to this, the grain size of the white spots is 50 μm, significantly 5 times larger than that of the traditional tissue. White spots are most likely to occur at the core location of the bar. The probability of white spots arising at the outer edge is the smallest, only 7%. In the hot working process of disk forgings, the white spots in the core, 1/2R and outer edge of the bar are left to the hub, spoke and rim of the disk, respectively. The results of the study can provide scientific and experimental support for controlling the size of internal defects and predicting the location of defect transfer in disk forgings during actual production.