固溶温度对含铪高钨K416B镍基高温合金组织的影响

侯桂臣; 苏海军; 谢君; 荀淑玲; 于金江; 孙晓峰; 周亦胄

doi:10.11868/j.issn.1005-5053.2018.000086

固溶温度对含铪高钨K416B镍基高温合金组织的影响

doi: 10.11868/j.issn.1005-5053.2018.000086

1.
中国科学院金属研究所，沈阳 110016
2.
西北工业大学凝固技术重点实验室，西安 710072

基金项目: 国家重点基础研究发展计划（973）（2010CB631200，2010CB631206）；国家自然科学基金51701212，50931004，51571196，51601192，51671188)；凝固技术国家重点实验室开放课题（SKLSP201747）

详细信息

通讯作者:
谢君（1986—），男，博士，副研究员，主要从事高温合金组织与性能控制及纯净化冶炼技术研究，（E-mail）junxie@imr.ac.cn

中图分类号: TG113.12
计量
- 文章访问数: 2547
- HTML全文浏览量: 1433
- PDF下载量: 53
- 被引次数: 0
出版历程
- 收稿日期: 2018-08-02
- 修回日期: 2018-09-21
- 网络出版日期: 2019-04-03
- 刊出日期: 2019-06-01

Effect of solid solution temperature on microstructure of Hf-containing K416B Ni-based superalloy with high W-content

1.
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
2.
Northwestern Polytechnical University, State Key Laboratory of Solution Processing, Xi’an 710072, China

摘要

摘要: 通过对含铪高钨K416B镍基高温合金进行不同温度固溶处理后的组织形貌观察，研究固溶温度对K416B合金组织的影响。结果表明：随着固溶温度的升高，在合金元素的扩散作用下，合金中的二次枝晶尺寸略有增大，使枝晶间的共晶含量逐渐减少，促使合金组织致密化；同时合金中的γ′相发生溶解，使其尺寸减小；在高温固溶处理期间，枝晶间区域的初生条状MC相发生分解形成粒状M₆C碳化物；而共晶处的大尺寸块状M₆C相形态与数量无明显变化；固溶处理使偏聚于枝晶干的元素W向枝晶间扩散，而Hf、Nb、Ti和Cr元素向枝晶干扩散，大幅降低合金各元素的偏析程度。组织研究结果表明，1220 ℃保温4 h为合金组织状态最佳的固溶热处理工艺。
- K416B镍基高温合金 /
- 固溶温度 /
- 组织形貌
Abstract: By means of microstructure observation on Hf-containing K416B Ni-based superalloy with high W-content after solid solution heat treatment at different temperatures, the effect of solid solution temperature on microstructure of the alloy was investigated. The results show that with the increasing of solid solution temperature, the size of secondary dendrite increases slightly by element diffusion, and the eutectic content decreases gradually to promote the densification of alloy microstructure. In addition, the γ′ phase is dissolved into the matrix, and its size is decreased. During high temperature solid solution heat treatment, the primary strip MC phase in the inter-dendrite is decomposed to form granular M₆C carbides, while the morphology and quantity of large sized block M₆C phase in eutectic have no obvious change. The solid solution treatment causes that the element W is segregated in the dendrites to diffuse into inter-dendrites, and elements of Hf, Nb, Ti and Cr diffuse into the dendrites, the segregation degree of each element of the alloy is greatly reduced. The results of microstructure research indicate that the optimal solid-solution heat treatment process for the alloy is 1220 ℃ × 4 h.
- K416B Ni-based superalloy /
- solution temperature /
- microstructure

HTML全文

图 1 不同温度固溶合金的枝晶形貌　（a）铸态；（b）1180 ℃；（c）1200 ℃；（d）1220 ℃

Figure 1. Dendrite morphologies of solid solution alloy at different temperatures　（a）as-cast；（b）1180 ℃；（c）1200 ℃；（d）1220 ℃

下载: 全尺寸图片幻灯片

图 2 不同温度固溶合金的共晶形貌　（a）铸态；（b）1180 ℃；（c）1200 ℃；（d）1220 ℃

Figure 2. Eutectic morphologies of solid solution alloy at different temperatures　（a）as-cast；（b）1180 ℃；（c）1200 ℃；（d）1220 ℃

下载: 全尺寸图片幻灯片

图 3 不同温度固溶处理合金中枝晶间区域的碳化物形貌　（a）铸态；（b）1180 ℃；（c）1200 ℃；（d）1220 ℃

Figure 3. Carbide morphologies of inter-dendrite region in the alloy treated in solid solution at different temperatures　（a）as-cast；（b）1180 ℃；（c）1200 ℃；（d）1220 ℃

下载: 全尺寸图片幻灯片

图 4 固溶前后合金的中碳化物的TEM形貌　（a）铸态；（b）1220 ℃固溶

Figure 4. TEM morphologies of carbides in the alloy before and after solid solution treatment　（a）as-cast；（b）solid solution at 1220 ℃

下载: 全尺寸图片幻灯片

图 5 不同温度固溶处理合金中共晶处的碳化物形貌　（a）铸态；（b）1180 ℃；（c）1200 ℃；（d）1220 ℃

Figure 5. Morphologies of carbides in the eutectic region of the alloy treated in solid solution at different temperatures　（a）as-cast；（b）1180 ℃；（c）1200 ℃；（d）1220 ℃

下载: 全尺寸图片幻灯片

图 6 不同温度固溶处理合金中枝晶干区域的γ′相形貌　（a）铸态；（b）1180 ℃；（c）1200 ℃；（d）1220 ℃

Figure 6. Morphologies of γ′ phase in dendritic stem region of the alloy treated in solid solution at different temperatures　（a）as-cast；（b）1180 ℃；（c）1200 ℃；（d）1220 ℃

下载: 全尺寸图片幻灯片

图 7 不同状态合金中元素偏析系数分布图

Figure 7. Distribution of element segregation coefficient in the alloy at different states

下载: 全尺寸图片幻灯片

参考文献(17)

[1]	ZHOU T J,DING H S,MA X P,et al. Microstructure and stress-rupture life of high W-content cast Ni-based superalloy after 100-1100 ℃ thermal exposures[J]. Materials Science and Engineering: A,2018,725:299-308. doi: 10.1016/j.msea.2018.04.037
[2]	杨金侠,李金国,王猛,等. 热处理工艺对一种新型铸造镍基高温合金的组织和性能影响[J]. 金属学报,2012,48(6):654-660. YANG J X,LI J G,WANG M,et al. Effects of heat treatment process on the microstructure and properties of a new cast nickel-based superalloy[J]. Acta Metallurgica Sinica,2012,48(6):654-660.)
[3]	谢君,于金江,孙晓峰,等. 高钨K416B铸造镍基合金高温蠕变期间碳化物演化行为[J]. 金属学报,2015,51(4):458-464. XIE J,YU J J,SUN X F,et al. Carbide evolution behavior of K416B as-cast Ni-based superalloy with high W-content during high temperature creep[J]. Acta Metallurgica Sinica,2015,51(4):458-464.)
[4]	谢君. K416B镍基合金的制备工艺和力学性能研究[R]. 沈阳: 中国科学院金属研究所, 2015. XIE J. Research on preparation technology and mechanical properties of K416B Ni-base superalloy[R]. Shenyang: Postdoctoral Research Report of the Institute of Metal Research, Chinese Academy of Sciences, 2015.
[5]	YUE X D,LI J R,SHI Z X,et al. Designing of homogenization-solution heat treatment for advanced single crystal superalloys[J]. Rare Metal Materials and Engineering,2017,46(6):1530-1535. doi: 10.1016/S1875-5372(17)30159-5
[6]	陈昊,董建新,张麦仓. 热处理工艺对铸造高温合金K480组织的影响[J]. 材料热处理学报,2012,33(7):37-44. CHEN H,DONG J X,ZHANG M C. Effect of heat treatment process on microstructure of cast superalloy K480[J]. Transactions of Materials & Heat Treatment,2012,33(7):37-44.)
[7]	XIE J,YU J J,SUN X F,et al. Thermodynamics analysis and precipitation behavior of fine carbide in K416B Ni-base superalloy with high W content during creep[J]. Transactions of Nonferrous Metals Society of China,2015,25:1478-1483. doi: 10.1016/S1003-6326(15)63748-7
[8]	谢君,于金江,孙晓峰,等. 含铪高钨K416B镍基铸造高温合金的组织与蠕变行为[J]. 中国有色金属学报,2015,25(6):1490-1497. XIE J,YU J J,SUN X F,et al. Microstructure and creep behavior of Hf-containing K416B as-cast Ni-based superalloy with high W content[J]. The Chinese Journal of Nonferrous Metals,2015,25(6):1490-1497.)
[9]	谢君,于金江,孙晓峰,等. 温度对高钨K416B镍基合金拉伸行为的影响[J]. 金属学报,2015,51(8):943-950. XIE J,YU J J,SUN X F,et al. Influence of temperature on tensile behavior of K416B Ni-based superalloy with high W content[J]. Acta Metallurgica Sinica,2015,51(8):943-950.)
[10]	KUO Y L,HORIKAWA S,KAKEHI K. Effect of build direction and heat treatment on creep properties of Ni-base superalloy built up bu additive manufacturing[J]. Scripta Materialia,2017,129:74-78. doi: 10.1016/j.scriptamat.2016.10.035
[11]	崔令海,林熙原,朱强,等. 高温合金热处理工艺研究进展[J]. 材料导报,2016,30(13):106-110. CUI L H,LIN X Y,ZHU Q,et al. Research progress on heat treatment process of superalloys[J]. Materials Review,2016,30(13):106-110.)
[12]	LI C J,YUAN Z J,FAN Y,et al. Microstructure and mechanical properties of a Ni-based superalloy after heat treatment in a steady magnetic field[J]. Journal of Materials Processing Technology,2017,246:176-184. doi: 10.1016/j.jmatprotec.2017.03.018
[13]	PANYAWAT W,BUTSABAWAN A,PIYPAK C,et al. Effect of solution treatment and precipitation aging conditions on microstructural refurbishment in cast nickel-base superalloy, grade MGA1400[J]. Materials Today: Proceedings,2018,5(3):9399-9403. doi: 10.1016/j.matpr.2017.10.116
[14]	姚志浩,董建新,张麦仓,等. 固溶及稳定化工艺对GH738合金碳化物和γ′相析出规律的影响[J]. 材料热处理学报,2013,34(10):43-49. YAO Z H,DONG J X,ZHANG M C,et al. Influence of solution and stabilization heat treatment on carbide and gamma prime for super alloy GH738[J]. Transactions of Materials & Heat Treatment,2013,34(10):43-49.)
[15]	张琰斌,刘林,黄太文,等. 一种含硼第三代镍基单晶高温合金的初熔及固溶处理[J]. 稀有金属材料与工程,2017,46(10):3105-3110. ZHANG Y B,LIU L,HUANG T W,et al. The initial melting and solution treatment of a third-generation nickel-based single crystal superalloy containing boron[J]. Rare Metal Materials and Engineering,2017,46(10):3105-3110.)
[16]	张洪伟,秦学智,李小武,等. 一种高硼定向凝固合金的初熔行为及其对力学性能的影响[J]. 金属学报,2017,53(6):684-694. ZHANG H W,QIN X Z,LI X W,et al. The initial melting behavior of a boron-rich directional solidification alloy and its effect on mechanical properties[J]. Acta Metallurgica Sinica,2017,53(6):684-694.)
[17]	GONG L,CHEN B,DU Z H,et al. Investigation of solidification and segregation characteristics of cast Ni-base superalloy K417G[J]. Journal of Materials Science & Technology,2018,34(3):541-550.