材料工程2025，Vol.53Issue(8)：157-165,9.DOI:10.11868/j.issn.1001-4381.2022.000984
超声法对不同强度低合金钢板残余应力测试
Residual stress measurement of low alloy steel plate with different strength by ultrasonic method
摘要
Abstract
As a method of non-destructive testing of residual stress,ultrasonic testing has been widely used in the measurement of the residual stress of various metal materials and components,but ultrasonic testing is greatly affected by the microstructure of the detection material,resulting in inaccurate detection results.Based on the acoustic elasticity theory,the effects of the microstructure of steel plate with different strength on the ultrasonic longitudinal wave velocity and residual stress detection results are studied,and the possibility of strain in the selected test samples is ruled out by drilling method and X-ray diffraction.The results indicate that under stress-free conditions,ultrasonic longitudinal wave propagation speed is the fastest in ferrite,faster in pearlite and slowest in martensite,and grain size also has an effect on ultrasonic longitudinal wave speed.However,when the grains show obvious anisotropy,the influence of grain orientation is more significant than that of the structure on the ultrasonic longitudinal wave velocity.When the same steel plate is tested with different benchmarks,the error caused by the residual stress test results is about 800 MPa due to the different microstructures of the benchmarks.Choosing the stress-free benchmark which is the same as the microstructure of the material to be tested can avoid the influence of microstructure on ultrasonic testing and significantly increase the accuracy of ultrasonic testing of residual stress.关键词
临界折射纵波/超声法/残余应力/声时差/微观结构Key words
LCR wave/ultrasonic method/residual stress/TOF/microstructure分类
矿业与冶金引用本文复制引用
刘佳磊,李昭东,曹燕光,詹洪磊,杨忠民,张建卫..超声法对不同强度低合金钢板残余应力测试[J].材料工程,2025,53(8):157-165,9.基金项目
国家重点研发计划课题(2022YFB3706401) （2022YFB3706401）
钢铁研究总院自主投入研发专项基金重大项目(事21G62470ZD) （事21G62470ZD）
