压力容器2023，Vol.40Issue(10)：17-27,11.DOI:10.3969/j.issn.1001-4837.2023.10.003
超温处理对加氢反应器短时力学性能与长期服役性能的影响
Effect of overheating treatment on short-term mechanical properties and long-term service performance of hydrogenation reactors
摘要
Abstract
Hydrogenation reactors are the critical equipment in petrochemical industry and coal chemical industry,and the overheating phenomena occurring in service may exert significant effects on microstructure and mechanical properties of the materials.Taking the typical 2.25Cr1Mo0.25V material as the research object,the overheating simulation experiment at different temperatures(600,700,800,900℃)and time(2,6,10 h).The evolution laws of microstructure and mechanical properties were further investigated by the metallographic analysis,tensile testing,impact testing,hardness testing and scanning electron microscopy(SEM).The results show that 600℃and 700℃overheating is equivalent to high temperature tempering,its microstructure is tempered bainite and there is almost no change in mechanical properties.Once the 800℃overheating reaches part of phase change temperature Ac1 for austenitization,granular bainite is formed and ferrite and cementite precipitate at the same time,which results in strength increase and toughness decrease.If 900℃overheating reaches the full phase change temperature Ac3 for austenization,large amount of granular bainite is formed accompanied by precipitation of ferrite and cementite,the strength increases sharply and the brittleness decreases remarkably.To avoid major accidents,safety evaluation must be carried out comprehensively on hydrogenation reactors of 2.25Cr1Mo0.25V experiencing above 900℃overheating,and it should be put into operation cautiously.关键词
加氢反应器/2.25Cr1Mo0.25V/超温处理/微观组织/力学性能Key words
hydrogenation reactor/2.25Cr1Mo0.25V/overheating treatment/microstructure/mechanical properties分类
机械制造引用本文复制引用
刘娟波,成雷,白学刚,袁军,谢国山,韩志远..超温处理对加氢反应器短时力学性能与长期服役性能的影响[J].压力容器,2023,40(10):17-27,11.基金项目
"十四五"国家重点研发计划项目(2021YFC3001801) （2021YFC3001801）
国家市场监督管理总局科技计划项目(2021MK175) （2021MK175）
