GH4169真空感应过程夹杂物的演变机制

李靖; 蒋世川; 戚慧琳; 周扬

doi:10.7513/j.issn.1004-7638.2023.03.024

GH4169真空感应过程夹杂物的演变机制

doi: 10.7513/j.issn.1004-7638.2023.03.024

李靖^{1, 2,},
蒋世川^{1, 2},
戚慧琳^{1, 2},
周扬^{1, 2}

1.
成都先进金属材料产业技术研究院股份有限公司, 四川成都 610300
2.
海洋装备用金属材料及其应用国家重点实验室, 辽宁鞍山 114009

详细信息

作者简介:
李靖，1994年出生，男，四川成都人，硕士, 主要从事高温合金材料有关特种冶炼的研究工作，E-mail：lj19801239530@163.com

中图分类号: TG132.3,TF76
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出版历程
- 收稿日期: 2022-07-21
- 刊出日期: 2023-06-30

Evolution mechanism of inclusions in GH4169 produced by vacuum induction melting

Li Jing^{1, 2
,},
Jiang Shichuan^{1, 2},
Qi Huilin^{1, 2},
Zhou Yang^{1, 2}

1.
Chengdu Insititute of Advanced Metallic Material Technolgy and Industry Co., Ltd., Chengdu 610300, Sichuan, China
2.
State Key Laboratory of Metal Material for Marine Equipment and Application, Anshan 114009, Liaoning, China

摘要

摘要: 高温合金中夹杂物是影响合金冶金质量和使用性能的主要因素，因此研究了GH4169镍基高温合金真空感应（VIM）熔炼制备过程中夹杂物的演变机制。采用真空感应炉对GH4169合金进行冶炼，通过ASPEX型自动扫描电镜分析检测夹杂物的物相组成、尺寸形貌及成分，并分析夹杂物的形成机理、来源及演变机制。结果表明，真空熔炼GH4169合金主要生成五种类型夹杂物：Al₂O₃、MgAl₂O₄和MgO单层夹杂物，MgAl₂O₄-Ti(C,N)-NbC和MgO-Ti(C,N)-NbC多层复合夹杂物。Al₂O₃在熔化期形成，MgAl₂O₄在精炼期形成，加入Nb、Al、Ti合金化后形成MgAl₂O₄-Ti(C,N)-NbC夹杂，加入Mg合金化后生成MgO和MgO-Ti(C,N)-NbC夹杂。随冶炼过程的进行，夹杂物的数量密度先增加后减少，在精炼期夹杂物数量密度达到峰值211.42个/mm²，精炼期结束后，夹杂物数量减少，出钢前夹杂物数量密度46.57个/mm²。
- GH4169合金 /
- 真空感应熔炼 /
- 夹杂物 /
- 演变机制
Abstract: Inclusion had been considered as main factor affecting metallurgical quality and mechanical property of Ni-based superalloys. In this work the evolution mechanism of inclusions during the preparation of GH4169 Ni-based superalloy by vacuum induction melting (VIM) was studied. A method of ASPEX automatic scanning electron microscope was utilized to characterize the inclusions in GH4169 Ni-based superalloy prepared by vacuum induction melting (VIM). The phases, compositions, morphologies, formation mechanism and evolution mechanism of the inclusions were analyzed. The results indicate that the inclusions of single phase in GH4169 include mainly Al₂O₃、MgAl₂O₄ and MgO. The inclusions of composite phases include mainly MgAl₂O₄-Ti(C,N)-NbC and MgO-Ti(C,N)-NbC. Al₂O₃ forms during melting period, MgAl₂O₄ forms during refining period, and MgAl₂O₄-Ti(C,N)-NbC forms after alloying with Nb, Al and Ti, and MgO and MgO-Ti(C,N)-NbC form after alloying with Mg. As smelting process going, the number density of inclusions firstly increases and then decreases, and the number density of inclusions reaches a peak value of 211.42/mm² during the refining period. After the refining period, the number of inclusions decreases, and the number density of inclusions before pouring is 46.57/mm².
- GH4169 alloy /
- vacuum induction melting /
- inclusions /
- evolution mechanism

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图 1 真空感应熔炼过程样取样区域

Figure 1. Location of sampling during vacuum induction melting process

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图 2 全自动钢中非金属夹杂物检测分析步骤

Figure 2. Steps of automated analysis of non-metallic inclusions in steel

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图 3 Al₂O₃夹杂物形貌及能谱

Figure 3. Morphology and energy spectrum diagram of Al₂O₃

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图 4 MgAl₂O₄夹杂物形貌及能谱

Figure 4. Morphology of MgAl₂O₄

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图 5 Ti(C,N)-Nb和MgAl₂O₄-Ti(C,N)-NbC夹杂物形貌

Figure 5. Morphology of (a) Ti(C,N)-Nb and (b) MgAl₂O₄-Ti(C,N)-NbC

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图 6 MgO和MgO-Ti(C,N)-NbC夹杂物形貌

Figure 6. Morphology of (a) MgO and (b) MgO-Ti(C,N)-NbC

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图 7 单位面积内不同类型夹杂物的数量

Figure 7. Number of different types of inclusions per unit area

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图 8 单位面积内夹杂物的面积总和

Figure 8. The total area of inclusions per unit area

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表 1 GH4169高温合金的化学成分

Table 1. Chemical composition of GH4169 superalloy %

Ni Cr Mo Nb Al Ti Mg C Fe

50.0～55.0 17.0～20.0 2.8～3.2 5.0～5.5 0.5～0.7 0.8～1.5 ≤0.05 ≤0.08 余量

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