高温合金GH4065A在高压下凝固的组织研究

李靖; 税烺; 周扬; 张树才

doi:10.7513/j.issn.1004-7638.2021.05.026

高温合金GH4065A在高压下凝固的组织研究

doi: 10.7513/j.issn.1004-7638.2021.05.026

李靖^{1, 2,},
税烺^{1, 2},
周扬^{1, 2},
张树才³

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
3.
东北大学冶金学院, 辽宁沈阳 110819

详细信息

作者简介:
李靖（1994—），男，硕士研究生，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,TG249.2
计量
- 文章访问数: 414
- HTML全文浏览量: 131
- PDF下载量: 41
- 被引次数: 0
出版历程
- 收稿日期: 2021-06-21
- 刊出日期: 2021-10-30

Study on the microstructure of superalloy GH4065A solidified under high pressure

Li Jing^{1, 2
,},
Shui Lang^{1, 2},
Zhou Yang^{1, 2},
Zhang Shucai³

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
3.
School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China

摘要

摘要: 通过OM和SEM观察了以常压和加压（2 MPa）两种凝固方式下的GH4065A铸锭显微组织，以分析加压对GH4065A铸锭凝固组织的影响。结果表明，常压下的铸态GH4065A有大量疏松缩孔，微观组织中主要析出相是γ’相，偏析最为严重的元素是Nb。在2 MPa下进行凝固，可以消除大量疏松缩孔，提高铸件的致密度，并使Nb元素的残余偏析指数大大降低；加压凝固可以使合金GH4065A的二次枝晶间距低于常压铸锭，这是由于加压使相变温度升高，从而增大熔体的相变驱动力，增加结晶数目，晶粒细化。上述结果表明加压凝固在高温合金中的巨大优势和应用前景，推广到更多的高温合金牌号，以发挥压力凝固的重要价值。
- 高温合金 /
- 加压凝固 /
- 微观组织 /
- 偏析规律
Abstract: OM and SEM were used to observe the microstructure of GH4065A under two solidification modes: normal pressure and pressure (under 2 MPa) to analyze the effect of high pressure on the structure. The results show that the as-cast GH4065A structure under normal pressure has a large number of loose shrinkage cavities, the main precipitated phase in the microstructure is γ' phase, and the most severely segregated element is Nb. Solidification at 2 MPa can eliminate a large number of loose shrinkage cavities, increase the density of castings, and greatly reduce the residual segregation index of Nb element. At the same time, the pressure solidification can make the secondary dendrite spacing of alloy GH4065A lower than that of the normal pressure ingot. This is because the pressure increases the phase transition temperature, thereby increasing the phase transition driving force of the melt and refining the crystal grains. These results demonstrate that the great advantages and application prospects of pressurized solidification in superalloys, and it can be extended to other superalloy grades in order to exert the important value of pressurized solidification.
- superalloy /
- pressurized solidification /
- microstructure /
- segregation characteristics

HTML全文

图 1 铸态GH4065A的取样位置

（a）常压；（b）高压

Figure 1. Sampling position of as-cast GH4065A (a)normal pressure, (b)high pressure

下载: 全尺寸图片幻灯片

图 2 GH4065A的低倍组织

（a）常压；（b）高压

Figure 2. Macrostructure of GH4065A (a) normal pressure, (b) high pressure

下载: 全尺寸图片幻灯片

图 3 铸态GH4065A枝晶形貌及析出相形貌

（a）枝晶形貌；（b）析出相

Figure 3. (a) Dendrite morphology and (b) precipitated phase morphology of as-cast GH4065A

下载: 全尺寸图片幻灯片

图 4 铸态GH4065A不同凝固方式二次枝晶间距测量结果

Figure 4. Measurements of second dendrite distance of multiple locations of as-cast GH4065A

下载: 全尺寸图片幻灯片

图 5 铸态GH4065A在扫描电镜下的点扫描分析

（a）枝晶干；（b）枝晶间

Figure 5. Point scanning analysis of as-cast GH4065A under scanning electron microscope (a) dendrite, (b) inter-dendrite

下载: 全尺寸图片幻灯片

表 1 GH4065A合金的名义成分^[7]

Table 1. Nominal chemical compositions of GH4065A alloy %

C	Cr	Co	Fe	Ti	Al	Nb	Mo	W	B	Zr	Ni
0.011	16.0	13.0	1.0	3.7	2.1	0.7	4.0	4.0	0.015	0.05	余量

下载: 导出CSV

表 2 常压下凝固铸锭各元素不同位置偏析系数K

Table 2. Segregation coefficient K of various elements in different positions of non-pressurized solidified ingot

试样编号	Al	Ti	Cr	Fe	Co	Ni	Nb	Mo	W
1	1.04	2.34	0.86	0.64	0.91	1.02	5.62	1.19	0.60
2	1.08	2.35	0.90	0.87	0.90	1.01	3.86	1.17	0.63
3	0.84	2.98	0.84	1.04	0.89	0.97	11.38	1.40	0.60
4	0.97	1.79	0.96	1.04	0.95	0.99	3.38	1.14	0.78
5	0.97	1.42	0.95	1.05	0.96	1.00	2.06	1.09	0.83
6	0.91	2.94	0.85	0.74	0.86	0.94	14.02	1.22	0.88

下载: 导出CSV

表 3 加压凝固铸锭各元素不同位置偏析系数K

Table 3. Segregation coefficient K of various elements in different positions of pressurized solidification ingot

试样编号	Al	Ti	Cr	Fe	Co	Ni	Nb	Mo	W
1	1.09	2.19	0.94	0.99	0.89	1.00	3.75	1.23	0.61
2	1.05	2.16	0.92	0.98	0.91	0.98	3.77	1.20	0.63
3	1.11	2.42	0.85	0.49	0.87	1.03	4.78	1.19	0.55
4	0.93	1.66	0.98	0.90	0.98	0.99	2.86	1.19	0.77
5	0.99	1.61	0.93	0.80	0.95	1.01	2.33	1.12	0.73
6	0.92	2.87	0.87	0.82	0.89	0.96	8.04	1.31	0.78

下载: 导出CSV

参考文献(14)

[1]	Stefanescu D M. Science and engineering of casting solidification[M]. New York: Kluwer Academic/Plenum Publishers, 2002.
[2]	Han Bo, Wu Sujun. Microstructural evolution of high manganese steel solidified under superhigh pressure[J]. Materials Letters, 2011:70(1):7-10.
[3]	朱红春, 姜周华, 李花兵, 等. 加压技术在高品质特殊钢冶炼和凝固中的作用[J]. 钢铁, 2015, 50(11): 37-44. Zhu Hongchun, Jiang Zhouhua, Li Huabing, et al. Effect of pressurization technology on steel-making and solidification of high-grade special steels[J]. Iron and Steel, 2015, 50(11): 37-44.
[4]	Wang Meng, Zeng Jianmin, Huang Weidong. Adjusted pressure casting technique for precision casting of large-scale complicated & thin-wall components[J]. Foundry Technology, 2004,(5):353−358. (王猛, 曾建民, 黄卫东. 大型复杂薄壁铸件高品质高精度调压铸造技术[J]. 铸造技术, 2004,(5):353−358. doi: 10.3969/j.issn.1000-8365.2004.05.015
[5]	He Shuxian, Liu Yahui, Wang Jun, et al. Research progress of metals and alloys pressurized solidification[J]. Foundry Technology, 2017,38(6):1253−1257. (何树先, 刘雅辉, 王俊, 等. 金属与合金加压凝固研究进展[J]. 铸造技术, 2017,38(6):1253−1257.
[6]	Ghanti S B. The effects of solidification under pressure on properties of cast aluminum alloys[D]. Alabama: The University of Alabama at Birmingham, 2011.
[7]	Zhao Guangpu, Huang Shuo, Zhang Beijiang, et al. Microstructure control and mechanical properties of the newest nickel-based wrought superalloy GH4065A[J]. Journal of Iron and Steel Research, 2015,27(2):37−44. (赵光普, 黄烁, 张北江, 等. 新一代镍基变形高温合金GH4065A的组织控制与力学性能[J]. 钢铁研究学报, 2015,27(2):37−44.
[8]	Batyshev K A. Casting of aluminum alloys with pressure crystal lization. Part 2[J]. Met Sci Heat Treat, 2012,54:55−62. doi: 10.1007/s11041-012-9454-y
[9]	苏志权, 孟照亮, 孙昌建. 真空增压铸造技术及其应用前景[J]. 特种铸造及有色合金, 2003(5): 38-40. Su Zhiquan, Meng Zhaoliang, Sun Changjian. Vacuum pressurized casting technology and its application prospects[J]. Special Casting & Nonferrous Alloys, 2003(5): 38-40.
[10]	Huang Shuo, Zhang Beijiang, Tian Qiang, et al. Isothermal and static oxidation behavior of superalloy GH4065A[J]. Journal of Iron and Steel Research, 2016,28(7):55−60. (黄烁, 张北江, 田强, 等. 高温合金GH4065A的恒温静态氧化行为[J]. 钢铁研究学报, 2016,28(7):55−60.
[11]	Zhang Beijiang, Zhao Guangpu, Zhang Wenyun, et al. Investigation of high performance disc alloy GH4065 and associated advanced processing techniques[J]. Acta Metallurgica Sinica, 2015,51(10):1227−1234. (张北江, 赵光普, 张文云, 等. 高性能涡轮盘材料GH4065及其先进制备技术研究[J]. 金属学报, 2015,51(10):1227−1234.
[12]	Tomasz Wojcik, Markus Rath, Ernst Kozeschnik. Characterisation of secondary phases in Ni-base superalloy Rene 65[J]. Materials Science and Technology, 2018, 34(13).
[13]	Wang Zixing, Huang Shuo, Zhang Beijiang, et al. Study on freckle of a high-alloyed GH4065 nickel base wrought superalloy[J]. Acta Metallurgica Sinica, 2019,55(3):417−426. (王资兴, 黄烁, 张北江, 等. 高合金化GH4065镍基变形高温合金点状偏析研究[J]. 金属学报, 2019,55(3):417−426.
[14]	Sosenushkin E N, Frantsuzova L S, Kozlova E M. Effect of pressure and temperature factors on the solidification of cast iron and its structure in liquid forging[J]. Metal Science & Heat Treatment, 2015.