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金属学报  2020, Vol. 56 Issue (7): 960-968    DOI: 10.11900/0412.1961.2019.00403
  本期目录 | 过刊浏览 |
AlNi1Cr9Al(1~3)Ni(1~7)WVNbB钢热变形行为的影响
赵嫚嫚1, 秦森1, 冯捷1, 代永娟1, 国栋1,2()
1.河北科技大学材料科学与工程学院 石家庄 050000
2.天津职业技术师范大学机械工程学院 天津 300222
Effect of Al and Ni on Hot Deformation Behavior of 1Cr9Al(1~3)Ni(1~7)WVNbB Steel
ZHAO Manman1, QIN Sen1, FENG Jie1, DAI Yongjuan1, GUO Dong1,2()
1. College of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050000, China
2. College of Mechanical Engineering, Tianjin Vocational and Technical Normal University, Tianjin 300222, China
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摘要: 

在T92钢的成分基础上添加了Al元素并对Ni含量进行适当调整后制备出新型1Cr9Al(1~3)Ni(1~ 7)WVNbB高铝铁素体耐热钢。利用Gleeble-3800热模拟试验机,对1Cr9Al(1~3)Ni(1~7)WVNbB高铝钢进行了950~1150 ℃、0.1~10 s-1应变速率下60%变形量的等温恒速热压缩实验,研究了Al、Ni加入量对钢热变形行为、峰值应力及热变形激活能的影响,并通过拟合得到了含有Zener-Hollomon参数的流变应力表达式,建立了该耐热钢的本构方程。结果表明,Al的添加及Al含量的增大明显降低了热压缩下的流变应力与峰值应力,即明显降低了钢的加工难度;与T92钢相比,4组试样的热变形激活能分别提高了38.136%、19.188%、28.003%和11.915%。

关键词 高铝铁素体耐热钢热压缩变形流变应力热变形本构方程    
Abstract

The addition of Al and Ni to ferritic heat resistant steel can improve its high temperature strength and high temperature oxidation resistance. Al and Ni in steel have some effects on the thermal deformation behavior of steel. But there is less research on it. In this work, a new type of 1Cr9Al(1~3)Ni(1~ 7)WVNbB high aluminum ferrite heat-resistant steel was prepared by adding Al element to T92 steel and adjusting Ni content properly. Gleeble-3800 thermal simulation test machine was used to conduct isothermal and constant speed thermal compression experiment with 60% deformation at 950~1150 ℃ and 0.1~10 s-1 strain rates, respectively. The effects of Al and Ni additions on the hot deformation behavior, peak stress and activation energy of hot deformation of the steel were studied. The rheological stress expression containing Zener-Hollomon parameters were obtained by fitting, and the constitutive equation of the test steel was established. The results show that the addition of Al and the increase of Al content significantly reduces rheological stress and peak stress under thermal compression, which greatly reduces the difficulty of test steel processing. Compared with T92 steel, the thermal deformation activation energies of four sample groups increase by 38.136%, 19.188%, 28.003%, and 11.915%, respectively. The peak stress calculated by the constitutive equation is in good agreement with the experimental data. The results show that the constitutive equation has high accuracy. The relationship between peak flow stress, deformation temperature and strain rate can be expressed well.

Key wordshigh alumina ferritic heat resistant steel    thermal compression deformation    rheological stress    thermal deformation constitutive equation
收稿日期: 2019-11-25     
ZTFLH:  TG142.33  
基金资助:国家自然科学基金项目(51774108);国家自然科学基金项目(51874116)
通讯作者: 国栋     E-mail: guodongbill@126.com
Corresponding author: GUO Dong     E-mail: guodongbill@126.com
作者简介: 赵嫚嫚,女,1993年生,硕士生

引用本文:

赵嫚嫚, 秦森, 冯捷, 代永娟, 国栋. AlNi1Cr9Al(1~3)Ni(1~7)WVNbB钢热变形行为的影响[J]. 金属学报, 2020, 56(7): 960-968.
Manman ZHAO, Sen QIN, Jie FENG, Yongjuan DAI, Dong GUO. Effect of Al and Ni on Hot Deformation Behavior of 1Cr9Al(1~3)Ni(1~7)WVNbB Steel. Acta Metall Sin, 2020, 56(7): 960-968.

链接本文:

https://www.ams.org.cn/CN/10.11900/0412.1961.2019.00403      或      https://www.ams.org.cn/CN/Y2020/V56/I7/960

Alloy No.CNSiMnCrMoNiAlNbVWBPSFe
T92[9]0.07~0.130.03~0.07≤0.500.30~0.608.50~9.500.30~0.60≤0.4000.040~0.0900.150~0.250~1.50~2.000.001~0.006≤0.020≤0.010Bal.
10.100.050.300.509.000.303.81.00.060.201.500.0030.0010.001Bal.
20.100.050.300.509.000.301.41.00.060.201.500.0030.0010.001Bal.
30.100.050.300.509.000.307.33.00.060.201.500.0030.0010.001Bal.
40.100.050.300.509.000.303.93.00.060.201.500.0030.0010.001Bal.
表1  T92钢[9]及1Cr9Al(1~3)Ni(1~7)WVNbB钢的化学成分 (mass fraction / %)
图1  等温压缩工艺流程示意图
图2  合金钢理想状态下的真应力-真应变曲线
图3  1Cr9Al(1~3)Ni(1~7)WVNbB钢及T92钢[9]在950 ℃、1150 ℃及1 s-1应变速率下的真应力-真应变曲线
图4  No.4试样在950~1150 ℃及0.1~10 s-1应变速率下的真应力-真应变曲线
图5  1Cr9Al(1~3)Ni(1~7)WVNbB高铝钢和T92钢[9]在不同变形温度和应变速率下的三维峰值流变应力图
图6  No.4试样lnσp-lnε˙、σp-lnε˙、ln[sinh(ασp)]-lnε˙、ln[sinh(ασp)]-1000/T的关系曲线
图7  No.4试样lnZ-ln[sinh(ασp)]的关系曲线

Steel

No.

n

α

MPa-1

A

s-1

Q

kJ·mol-1

16.695210.007596.38581×1020531.825
26.324100.007153.99328×1017458.873
35.758050.007241.51538×1019492.812
44.432330.010605.67709×1016430.874
表2  峰值应力下1Cr9Al(1~3)Ni(1~7)WVNbB高铝钢本构方程参数
图8  1Cr9Al(1~3)Ni(1~7)WVNbB高铝钢在950~1150 ℃、0.1~10 s-1应变速率下实验值和理论计算值之间的比较
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