机电工程技术2026，Vol.55Issue(15)：27-33,7.DOI:10.3969/j.issn.1009-9492.2025.00154
热等静压超高压容器用36CrNi3MoVA钢疲劳性能及微观组织机制研究
Research on Fatigue Performance and Microstructural Mechanism of 36CrNi3MoVA Steel for Ultra-high Pressure Vessels Used in Hot Isostatic Pressing
摘要
Abstract
The shortage of low-cycle fatigue data of 36CrNi3MoVA steel applied to 200 MPa grade wire-wound hot isostatic pressing vessels under stress amplitudes of 0～586 MPa is targeted,and fatigue tests and multi-scale microstructural characterizations are carried out in this work.Dumbbell-shaped specimens are subjected to cyclic loading by an electro-hydraulic servo fatigue testing machine under 1 Hz sinusoidal loading,and the fatigue behaviors and microstructural mechanisms of the material are analyzed.It is indicated by test results that no fracture is generated on specimens within 15 000 cycles,and a remarkable extension of fatigue life is observed with the reduction of stress amplitude from S-N curves.All cracks are found to initiate at surface micro-defects by SEM/EDS detection;clear fatigue striations are observed in crack propagation zones,and cleavage characteristics are presented in instant fracture zones.Uniform element distribution without segregation is verified by energy spectrum analysis.Nanoscale carbides inside grains and at grain boundaries are discovered by TEM observation,and dislocations are pinned by such carbides through the bypass mechanism to stabilize tempered martensite microstructures.No fatigue-induced phase transformation is detected by Raman spectroscopy.A positive correlation between the area ratios of crack initiation zones,crack propagation zones and fatigue life is confirmed by confocal measurements,and surface quality is identified as the key factor dominating fatigue life.A hierarchical inspection strategy oriented to RBI is put forward on the basis of test results,which includes outer wall ultrasonic guided wave inspection,inner wall phased array inspection and residual life prediction based on fracture mechanics.Data support and theoretical basis are supplied for regular scientific inspection and quantitative risk evaluation of HIP vessels.关键词
热等静压钢丝缠绕容器/疲劳测试/微观组织分析/SEM/EDS/TEMKey words
hot isostatic pressing wire-wound vessel/fatigue test/microstructural characterization/SEM/EDS/TEM分类
矿业与冶金引用本文复制引用
席净,武潭,王薪镜,李培娟,黄漫,刘璞,王峰,王光辉..热等静压超高压容器用36CrNi3MoVA钢疲劳性能及微观组织机制研究[J].机电工程技术,2026,55(15):27-33,7.基金项目
河南省中央引导地方科技发展资金项目(Z20241471018) （Z20241471018）
河南省高等学校重点科研项目(25A470003) （25A470003）
河南省市场监督管理局科技计划项目(HN-SCJK202531) （HN-SCJK202531）
河南省科技攻关计划项目(252102410011) （252102410011）
河南省锅炉压力容器检验技术科学研究院基本科研业务费支持项目(2023KY12) （2023KY12）
