CAJ | 학술논문

基于规则熔体理论和平衡反应基础，对连铸工序X80管线钢中碳化物、氮化物析出进行热力学分析，研究Ti、Nb及Al的碳化物、氮化物析出规律。结果表明，固液两相区，TiC0．005N0．995和TiN分别在1785 K和1784 K时开始析出；奥氏体相区，碳化物、氮化物析出先后顺序为NbC0．64N0．36、NbC、NbN、AlN、TiC ，相应析出温度为1457、1404、1354、1267、1226 K ；γ→α相变过程中，T iC发生相间析出，N b主要以 N bC形式析出，AlN析出量较少。
기우규칙용체이론화평형반응기출，대련주공서X80관선강중탄화물、담화물석출진행열역학분석，연구Ti、Nb급Al적탄화물、담화물석출규률。결과표명，고액량상구，TiC0．005N0．995화TiN분별재1785 K화1784 K시개시석출；오씨체상구，탄화물、담화물석출선후순서위NbC0．64N0．36、NbC、NbN、AlN、TiC ，상응석출온도위1457、1404、1354、1267、1226 K ；γ→α상변과정중，T iC발생상간석출，N b주요이 N bC형식석출，AlN석출량교소。
Based on the regular solution theory and equilibrium reaction ,the precipitation of carbides and nitrides in X80 pipeline steel are thermodynamically analyzed and the precipitation condition and a-mount of Ti ,Nb and Al precipitates are investigated .The results show that ,TiC0 .005N0 .0095 and TiN start to precipitate respectively at the temperatures of 1785 K and 1784 K in solid-liquid two-phase region ;NbC0 .64N0 .36 ,NbC ,NbN ,AlN and TiC start to precipitate respectively at the tem-peratures of 1457 , 1404 , 1354 , 1267 K and 1226 K ;in the austenite to ferrite phase transition process ,interphase precipitation of TiC will occur ;Nb element mainly precipitates in the form of NbC ;and the precipitation amount of AlN is insignificant .