CAJ | 학술논문

通过热力学计算和实验观察,对一种高钛含铌钢中Nb、Ti的析出行为进行研究.结果表明:实验钢中的铌的氮化物和碳化物在液相和凝崮过程中不能生成;氮化钛在凝同过程中析出,碳化钛在凝固末期形成;在奥氏体相中,实验钢中的Nb、Ti碳氮化物析出的先后顺序为TiN>Nb(CN)>NbC>TiC;铸坯中的析出相主要为氮化钛,而成品板材的二相粒子均为Ti、Nb复合的C、N化物.
통과열역학계산화실험관찰,대일충고태함니강중Nb、Ti적석출행위진행연구.결과표명:실험강중적니적담화물화탄화물재액상화응고과정중불능생성;담화태재응동과정중석출,탄화태재응고말기형성;재오씨체상중,실험강중적Nb、Ti탄담화물석출적선후순서위TiN>Nb(CN)>NbC>TiC;주배중적석출상주요위담화태,이성품판재적이상입자균위Ti、Nb복합적C、N화물.
The precipitation of Nb,Ti in low carbon steel with high titanium was researched by means of thermodynamic calculafion and experiment observation.The results show that(Nb,Ti)carbides and nitrides aren't able to form in liquid phase and socidification process.But TiN precipitates during solidification and TiC precipitates in the end of solidification.The precipitation sequence of Nb-Ti(C,N)is as follows:TiN>Nb(CN)>NbC>TiC.And TiN and Nb-Ti(C,N)is the main precipitants of the steel as-cast or as-rolled,respectively.