<strong>V</strong>元素对铁镍基变形高温合金<strong>GH4061</strong>组织和性能的影响

doi:10.11901/1005.3093.2018.571

材料研究学报

2019, Vol. 33

Issue (6): 419-426 DOI: 10.11901/1005.3093.2018.571

研究论文

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V元素对铁镍基变形高温合金GH4061组织和性能的影响

黄烁¹(

),贺玉伟²,胥国华¹,段然^1,²,王磊²,赵光普¹

1. 钢铁研究总院高温材料研究所北京 100081
2. 东北大学材料科学与工程学院沈阳 110006

Effects of Vanadium on Microstructure and Mechanical Properties of a Wrought Nickel-based Superalloy

Shuo HUANG¹(

),Yuwei HE²,Guohua XU¹,Ran DUAN^1,²,Lei WANG²,Guangpu ZHAO¹

1. Department of High-temperature Materials, Central Iron and Steel Research Institute, Beijing 100081, China
2. School of Materials Science and Engineering, Northeastern University, Shenyang 110006, China

引用本文:

黄烁,贺玉伟,胥国华,段然,王磊,赵光普. V元素对铁镍基变形高温合金GH4061组织和性能的影响[J]. 材料研究学报, 2019, 33(6): 419-426.
Shuo HUANG, Yuwei HE, Guohua XU, Ran DUAN, Lei WANG, Guangpu ZHAO. Effects of Vanadium on Microstructure and Mechanical Properties of a Wrought Nickel-based Superalloy[J]. Chinese Journal of Materials Research, 2019, 33(6): 419-426.

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摘要:

采用金相显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)和电化学萃取相分析等手段，研究了V元素对GH4061合金晶粒度、碳化物和γ?/γ"强化相等影响，测试了不同V含量试样的室温和750℃拉伸性能以及750℃/460 MPa持久性能，分析了V元素对合金显微组织和力学性能的影响。结果表明：GH4061合金中添加V元素促进了MC型碳化物和γ?/γ"相析出，使晶粒尺寸小幅减小；V元素通过增大γ基体的晶格常数，降低γ基体与γ?相的错配度，抑制了γ?/γ"相在750℃的快速粗化；V元素添加对室温拉伸性能影响不大，但可显著提升750℃拉伸强度和持久寿命；当V含量为0.4%(质量分数)时，GH4061合金具有最佳的750℃持久性能。

关键词 ：金属材料, 钒含量, 组织性能, GH4061合金, 变形高温合金

Abstract：

The effect of vanadium (V) addition on the tensile- and stress rupture-property at room temperature and 750℃, and the microstructure evolution of GH4061 alloy, including grain size, carbide and γ′/γ'' phase etc. were investigated by means of tensile- and stress rupture-testing, OM, SEM, TEM and electrochemical extraction and phase analysis of precipitates. The results show that V addition can promote the precipitation of MC-type carbide and γ′/γ'' phase, and refine the grain size slightly. With the increase of V content, the lattice constant of γ matrix increases, the mismatch between γ matrix and γ′ phase decreases, and the coarsening of γ′/γ'' phase at 750℃ is restrained. The addition of V does not have significant influence on room temperature tensile property, but apparently benefits the tensile strength and rupture life at 750℃. Furthermore, the GH4061 alloy with 0.4% (mass fraction) V addition shows the best stress rupture property at 750℃.

Key words： metallic materials vanadium content microstructure and mechanical property GH4061 alloy wrought superalloy

收稿日期: 2018-09-21

ZTFLH:

TG146.1

基金资助:国家科技重大专项(2018ZX06901028)

作者简介: 黄烁，男，1988年生，博士

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https://www.cjmr.org/CN/10.11901/1005.3093.2018.571 或 https://www.cjmr.org/CN/Y2019/V33/I6/419

图1 GH4061合金热轧棒的典型金相组织

表1 GH4061合金名义成分 (质量分数，%)

图2 标准热处理后不同V含量GH4061合金的典型金相组织

图3 V含量对GH4061合金晶粒尺寸的影响

图4 MC相的典型SEM形貌

图5 γ?和γ" phase的典型SEM形貌

图6 γ?和γ" phase的典型TEM形貌

表2 V0与V2试样的电化学萃取相分析结果

图7 V2试样典型的TEM高分辨形貌及傅里叶变换和选区衍射花样

图8 V含量对GH4061合金晶格常数和错配度的影响

图9 V含量对GH4061合金力学性能的影响

图10 V0和V2试样750℃保温180 min后γ? and γ" 的SEM形貌

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