三联冶炼<strong>GH4169</strong>合金研究进展

doi:10.11900/0412.1961.2023.00144

金属学报

2023, Vol. 59

Issue (9): 1159-1172 DOI: 10.11900/0412.1961.2023.00144

综述

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三联冶炼GH4169合金研究进展

杜金辉¹^,²(

), 毕中南¹^,², 曲敬龙²

¹钢铁研究总院高温合金新材料北京市重点实验室北京 100081
²北京钢研高纳科技股份有限公司北京 100081

Recent Development of Triple Melt GH4169 Alloy

DU Jinhui¹^,²(

), BI Zhongnan¹^,², QU Jinglong²

¹Beijing Key Laboratory of Advanced High Temperature Materials, Central Iron and Steel Research Institute, Beijing 100081, China
²Gaona Aero Material Co., Ltd, Beijing 100081, China

引用本文:

杜金辉, 毕中南, 曲敬龙. 三联冶炼GH4169合金研究进展[J]. 金属学报, 2023, 59(9): 1159-1172.
Jinhui DU, Zhongnan BI, Jinglong QU. Recent Development of Triple Melt GH4169 Alloy[J]. Acta Metall Sin, 2023, 59(9): 1159-1172.

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摘要:

三联冶炼技术的突破促进了我国GH4169合金盘锻件全流程制备技术的优化。本文综述了GH4169合金的化学成分、三联冶炼技术、开坯技术、锻造技术、残余应力控制、质量控制体系等方面的研究进展。三联冶炼技术的突破提高了GH4169合金的纯净度，降低了冶金缺陷概率；镦拔+径锻联合开坯提高了GH4169合金棒材组织均匀性和成材率；残余应力控制技术降低了GH4169合金盘件加工和服役过程中的变形量。此外，本文讨论了GH4169合金在超高强度、超大尺寸、高耐蚀性能和抗氢脆等研究中存在的难题，并对未来工作方向进行了展望。

关键词 ： GH4169合金, 三联冶炼, 镦拔, 径锻, 残余应力

Abstract：

The breakthrough application of triple melt technology (vacuum induction melting (VIM) + electroslag remelting (ESR) + vacuum arc remelting (VAR)) for fabricating GH4169 alloy facilitated the optimization of the entire production process of GH4169 disks. This paper summarizes the research progress on the chemical composition, triple melting, homogenization treatment, cogging, disk forging, residual stress control, and quality control system of GH4169 alloy. The breakthrough and large-scale application of triple melting technology have resulted in improved purity of the GH4169 alloy and reduced occurrence probability of metallurgical defects. In addition, the microstructural uniformity and yield of forging bars have been improved by the combination of fast (upsetting and drawing) and radial forging. Furthermore, deformations occurring during the machining and operation of GH4169 disks have been reduced using residual stress control technology. Results related to ultrahigh strength, ultralarge scale, high corrosion resistance, and hydrogen embrittlement characteristics of GH4169 alloy are discussed, and potential future research directions are outlined here.

Key words： GH4169 alloy triple melt upsetting and drawing radial forging residual stress

收稿日期: 2023-03-31

ZTFLH:

TG113.12

基金资助:国家重点研发计划项目(2022YFF0609300);国家重点研发计划项目(2017YFA0700703);国家科技重大专项项目(2019-VI-0021-0137)

作者简介: 杜金辉，男，1967年生，正高级工程师，博士

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https://www.ams.org.cn/CN/10.11900/0412.1961.2023.00144 或 https://www.ams.org.cn/CN/Y2023/V59/I9/1159

表1 GH4169合金主要化学成分 (mass fraction / %)

图1 GH4169合金中S和O元素含量的演变过程

图2 合金液在流槽内运动模拟的速度云图和流场迹线图(a) flow velocity (b) flow field traces

图3 真空感应熔炼(VIM)浇注过程中不同时刻锭模内的温度分布模拟结果及弦向应力和轴向应力模拟结果

表2 GH4169合金渣系成分表 (mass fraction / %)

图4 GH4169合金电渣重熔(ESR)铸锭边缘部位不同类型夹杂物的数量密度

图5 三联冶炼GH4169合金真空电弧重熔(VAR)铸锭低倍组织的数值模拟结果和实际解剖结果

图6 黑斑形成机理图[23]

图7 三联冶炼GH4169合金全流程中不同尺寸夹杂物所占比例及典型夹杂物形貌和EDS面扫元素分布图

图8 GH4169合金均匀化的VAR铸锭组织

图9 数值模拟的锻造方式对GH4169合金盘锻件晶粒尺寸的影响

图10 残余应力控制超级气冷设备示意图和工件流体场分布设计

图11 国家质量基础设施支撑高温合金盘件质量稳定性的示意图

表3 我国不同实验室对GH4169合金Nb元素的分析结果 (mass fraction / %)

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