High Temperature Mechanical Properties and Fracture Mechanism of 9Cr-2W-3Co Martensitic Heat-resistant Steel

Geng Wei; Zhu Zhibao; Ma Jinhui; Song Xinli; Ge Rui

doi:10.20057/j.1003-8620.2024-00227

您当前的位置：

首页 >

文章列表页 >

High Temperature Mechanical Properties and Fracture Mechanism of 9Cr-2W-3Co Martensitic Heat-resistant Steel

Product Research and Development | 更新时间：2025-05-09

- High Temperature Mechanical Properties and Fracture Mechanism of 9Cr-2W-3Co Martensitic Heat-resistant Steel
- Special Steel Vol. 46, Issue 3, Pages: 45-51(2025)
- 作者机构：
  
  1.武汉科技大学，先进耐火材料全国重点实验室，武汉 430081
  2.大冶特殊钢有限公司，黄石 435001
- 作者简介：
- 基金信息：
- DOI：10.20057/j.1003-8620.2024-00227
  CLC： TG142
- Received：23 September 2024，
  
  Published：30 May 2025
- 稿件说明：
移动端阅览
耿伟,朱志宝,马金辉等.9Cr-2W-3Co马氏体耐热钢高温力学性能与断裂机理[J].特殊钢,2025,46(03):45-51.

Geng Wei,Zhu Zhibao,Ma Jinhui,et al.High Temperature Mechanical Properties and Fracture Mechanism of 9Cr-2W-3Co Martensitic Heat-resistant Steel[J].Special Steel,2025,46(03):45-51.
耿伟,朱志宝,马金辉等.9Cr-2W-3Co马氏体耐热钢高温力学性能与断裂机理[J].特殊钢,2025,46(03):45-51. DOI： 10.20057/j.1003-8620.2024-00227.

Geng Wei,Zhu Zhibao,Ma Jinhui,et al.High Temperature Mechanical Properties and Fracture Mechanism of 9Cr-2W-3Co Martensitic Heat-resistant Steel[J].Special Steel,2025,46(03):45-51. DOI： 10.20057/j.1003-8620.2024-00227.

摘要

研究了正火回火9Cr-2W-3Co马氏体耐热钢的组织及其在625 ℃不同应变速率（5×10

、5×10

-1

、5×10

-2

、5×10

-3

、5×10

-4

-1

）条件下的拉伸强度与断裂机理。结果表明，9Cr-2W-3Co 马氏体耐热钢正火与回火后组织主要是回火板条马氏体组织，原奥氏体晶界与板条束界面有大量含铬的碳化物析出相，基体中含有一定密度的位错。试验钢在625 ℃拉伸，随着应变速率的增加，钢的屈服强度从237 MPa增加到430 MPa，抗拉强度从268 MPa增加到480 MPa，断面收缩率为28%~15.5%。断口中有大量不同尺寸的韧窝，不同应变速率试验钢基体中均存在高密度位错，位错与夹杂物或碳化物析出相交互作用，导致微孔的萌生与扩展，最终导致材料断裂。

Abstract

The microstructure of normalized

tempered 9Cr-2W-3Co martensitic heat-resistant steel and its tensile strength and fracture mechanism at different strain rates （5×10

， 5×10

-1

， 5×10

-2

， 5×10

-3

， 5×10

-4

-1

） at 625 ℃ was researched. The results showed that the tempered lath mart

ensitic structure of 9Cr-2W-3Co martensitic heat-resistant steel was mainly structure obtained after normalizing and tempering， and there were a large number of chromium-containing carbide precipitation phase at the interface between the original austenite grain boundary and the lath bundle， and a certain density of dislocations in the matrix. The test steel was stretched at 625 ℃， with the increasing of strain rate， the yield strength of steel increased from 237 MPa to 430 MPa， the tensile strength was increased from 268 MPa to 480 MPa， and the reduction of area was between 28% and 15.5%. There were a large number of dimples of different sizes in the fracture， and there were high density dislocation in the test steel matrix at different strain rates. The dislocation interacts with the interface of inclusions or lath or precipitates， leading to the initiation and expansion of micropores， and eventually the fracture of the material.

关键词

Keywords

references

Xiao B ， Xu L Y ， Zhao L ， et al . Creep properties， creep deformation behavior， and microstructural evolution of 9Cr-3W-3Co-1CuVNbB martensite ferritic steel ［J］. Materials Science and Engineering： A ， 2018 ， 711 ： 434 - 447 .

Fedoseeva A ， Tkachev E ， Kaibyshev R . Advanced heat-resistant martensitic steels： Long-term creep deformation and fracture mechanisms ［J］. Materials Science and Engineering： A ， 2023 ， 862 ： 144438 .

王敬忠，涂　凯，包汉生，等 . 超超临界电站用含Nb马氏体/奥氏体耐热钢的合金化现状［J］. 中国冶金， 2024 ， 34 （ 6 ）： 26 - 35 .

孙文强，周　珠，徐阿敏，等 . 热处理工艺对高铬低活化铁素体-马氏体钢力学性能的影响［J］. 特殊钢， 2024 ， 45 （ 2 ）： 105 - 111 .

Saini N ， Mulik R S ， Mahapatra M M . Study on the effect of ageing on laves phase evolution and their effect on mechanical properties of P92 steel ［J］. Materials Science and Engineering： A ， 2018 ， 716 ： 179 - 188 .

Pandey C ， Saini N ， Mahapatra M M ， et al . Hydrogen induced cold cracking of creep resistant ferritic P91 steel for different diffusible hydrogen levels in deposited metal ［J］. International Journal of Hydrogen Energy ， 2016 ， 41 （ 39 ）： 17695 - 17712 .

Song X L ， Huang C H ， Jia J ， et al . Effect of strain rate on fracture behaviour of Cr 18 Ni 11 Ti stainless steel at high temperatures ［J］. Journal of Iron and Steel Research International ， 2022 ， 29 （ 6 ）： 1004 - 1011 .

Kral P ， Dvorak J ， Sklenicka V ， et al . Microstructure and creep behaviour of P92 steel after HPT ［J］. Materials Science and Engineering： A ， 2018 ， 723 ： 287 - 295 .

Yoshizawa M ， Igarashi M ， Moriguchi K ， et al . Effect of precipitates on long-term creep deformation properties of P92 and P122 type advanced ferritic steels for USC power plants ［J］. Materials Science and Engineering： A ， 2009 ， 510-511 ： 162 - 168 .

Kipelova A ， Belyakov A ， Kaibyshev R . The crystallography of M 23 C 6 carbides in a martensitic 9% Cr steel after tempering， aging and creep ［J］. Philosophical Magazine ， 2013 ， 93 （ 18 ）： 2259 - 2268 .

Yin H F ， Ge W Q ， Yin F S ， et al . Effect of stress on the nucleation and evolution of Mo-rich Laves phase in 9.5Cr-1.5MoCoVNbNB heat-resistant steel during tensile rupture at 620 ℃ ［J］. Materials Characterization ， 2023 ， 196 ： 112565 .

Tabuchi M ， Hongo H ， Abe F . Creep strength of dissimilar welded joints using high B-9Cr steel for advanced USC boiler ［J］. Metallurgical and Materials Transactions A ， 2014 ， 45 （ 11 ）： 5068 - 5075 .

李晗，李晓，张雪姣，等 . 9Cr3W3Co钢热变形行为研究［J］. 大型铸锻件， 2023 ，（， 6 ）： 30 - 34 .

何焕生，余黎明，刘晨曦，等 . 新一代马氏体耐热钢G115的研究进展［J］. 金属学报， 2022 ， 58 （ 3 ）： 311 - 323 .

Sauzay M . Modelling of the evolution of micro-grain misorientations during creep of tempered martensite ferritic steels ［J］. Materials Science and Engineering： A ， 2009 ， 510-511 ： 74 - 80 .

Danielsen H K . Review of Z phase precipitation in 9-12 wt-Cr steels ［J］. Materials Science and Technology ， 2016 ， 32 （ 2 ）： 126 - 137 .

Danielsen H K ， Hald J . On the nucleation and dissolution process of Z-phase Cr（V， Nb）N in martensitic 12%Cr steels ［J］. Materials Science and Engineering： A ， 2009 ， 505 （ 1-2 ）： 169 - 177 .

C.G. Panait ， W. Bendick ， A. Fuchsmann ， A.-F. Gourgues-Lorenzon ， J. Besson ， Studyof the microstructure of the Grade 91 steel after more than 100，000 h of creepexposure at 600 °C， Int. J. Press . Vessels Pip . 2010， 87 ： 326 - 335 .

Vanaja J ， Laha K ， Mathew M D . Effect of tungsten on primary creep deformation and minimum creep rate of reduced activation ferritic-martensitic steel ［J］. Metallurgical and Materials Transactions A ， 2014 ， 45 （ 11 ）： 5076 - 5084 .

F. Dobes ， J. Cadek ， Contribution to the analysis of temporal interdependencies of creep ［J］， Kov. Mater ， 1981 ， 19 ： 31 - 40 .

Vanaja J ， Laha K . Assessment of tungsten content on tertiary creep deformation behavior of reduced activation ferritic-martensitic steel ［J］. Metallurgical and Materials Transactions A ， 2015 ， 46 （ 10 ）： 4669 - 4679 .

Dudova N ， Plotnikova A ， Molodov D ， et al . Structural changes of tempered martensitic 9Structural changes of tempered martensitic 9W-3Structural changes of tempered martensitic 9Structural changes of tempered martensitic 9W-3 eel during creep at 650 ℃ ［J］. Materials Science and Engineering： A ， 2012 ， 534 ： 632 - 639 .

Views

下载量

CSCD

CNKI被引量

Alert me when the article has been cited

提交

Tools

Publicity Resources

Effect of SiO₂ on Precipitation Phases and High-temperature Structures of Slags for Drawing-ingot-type Electroslag Remelting

Effect on Fatigue Failure Behavior Induced by Inclusions in GCr15 Bearing Steel Under Different Metallurgical Processes

The Effect of Rare Earth on the Precipitated Phases During Aging Process of T91 Heat-resistant Steel

Microstructure Evolution and Strengthening Mechanism of 2 100 MPa Grade Cold-Drawn Steel Wires for Bridge Cables

Effect of LF Soft Bubbling Time on Inclusions in Tire Cord Steel LX82 A

Related Author

Sun Xin

Wang Xinwei

Cao Junze

Zhou Weiji

Yao Yudong

Dong Yanwu

Jiang Zhouhua

Wang Zheng

Related Institution

School of Metallurgy， Northeastern University

Dongbei Special Steel Group Co.， Ltd.

Jiangying Xingcheng Special Steel Works Co.， Ltd.， Jiangying

Changzhou Baoling Heavy & Industrial Machinery Co.， Ltd.

School of Metallurgy and Ecological Engineering， University of Science and Technology Beijing

⁰