[1]张铮,黄晓明,余鑫.盐水冷却对S36950不锈钢力学性能的影响[J].福建工程学院学报,2023,21(04):307-313.[doi:10.3969/j.issn.1672-4348.2023.04.001]
　ZHANG Zheng,HUANG Xiaoming,YU Xin.Effect of brine cooling on mechanical properties of S36950 stainless steel[J].Journal of FuJian University of Technology,2023,21(04):307-313.[doi:10.3969/j.issn.1672-4348.2023.04.001]
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盐水冷却对S36950不锈钢力学性能的影响()
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《福建工程学院学报》[ISSN:2097-3853/CN:35-1351/Z]

卷:
第21卷
期数:
2023年04期
页码:
307-313
栏目:
出版日期:
2023-08-25

文章信息/Info

Title:
Effect of brine cooling on mechanical properties of S36950 stainless steel
作者:
张铮; 黄晓明; 余鑫
福建理工大学土木工程学院
Author(s):
ZHANG Zheng1;  HUANG Xiaoming1;  YU Xin
School of Civil Engineering, Fujian University of Technology
关键词:
奥氏体不锈钢; 高温后; 盐水冷却; 力学性能; 本构模型
Keywords:
austenitic stainless steel;  posthigh temperature exposure;  brine cooling;  mechanical properties;  constitutive model
分类号:
TU398
DOI:
10.3969/j.issn.1672-4348.2023.04.001
文献标志码:
A
摘要:
为考察盐水冷却对S36950不锈钢高温后力学性能的影响,选取普通S30408不锈钢为参考对象进行了不同温度工况冷却后两类不锈钢的拉伸试验,获取高温盐水冷却后其力学性能指标(弹性模量、名义屈服强度、抗拉极限强度、断后伸长率等)的变化规律,与同类型钢材采用普通水冷却的既有高温后试验结果对比。结果表明,盐水冷却后两类不锈钢表观均出现了明显的腐蚀现象;盐水冷却使得两类不锈钢在敏化温度段(600~800 ℃)的高温后弹性模量与延伸率有所波动;采用盐水冷却的两类不锈钢高温后强度均较普通水冷有所下降,且S36950 不锈钢的屈服与极限强度在800 ℃高温后下降显著。基于试验结果修正了既有不锈钢高温后本构模型,提高了其对盐水冷却的S36950 不锈钢高温后应力-应变关系的预测精度。
Abstract:
In order to investigate the effect of brine cooling on the mechanical properties of S36950 stainless steel after high temperature, the tensile test of two kinds of stainless steel after cooling at different temperature conditions was carried out by selecting ordinary S30408 stainless steel as the reference object. The variation law of mechanical properties (elastic modulus, nominal yield strength, tensile ultimate strength, elongation after fracture, etc.) after high temperature brine cooling was obtained, which was compared with the existing high temperature test results of the same type of steel cooled by ordinary water. Results show that obvious corrosion appeared on the surface of two kinds of stainless steel after brine cooling. The elastic modulus and elongation of the two types of stainless steels fluctuated after high temperature in the sensitization temperature range (600~800 ℃) due to brine cooling. The strength of the two types of stainless steel cooled by brine after high temperature was lower than that of ordinary water cooling, and the yield and ultimate strength of S36950 stainless steel decreased significantly after such high temperature as 800 ℃. At last, the existing stressstrain constitutive model of stainless steel after elevated temperatures was modified based on current test data, to achieve a better prediction accuracy for S36950 stainless steel after elevated temperatures with brine cooling.
更新日期/Last Update: 2023-08-25