无磁钻铤用Cr-Mn-Ni-N系高氮钢平衡凝固相变与析出行为  

Phase transformation and precipitation behavior of Cr-Mn-Ni-N high nitrogen steel for non-magnetic drilling collar during equilibrium solidification

作　　者：王英虎 郑淮北 白青青 宋令玺 姚斌 王利伟[3] Wang Yinghu;Zheng Huaibei;Bai Qingqing;Song Lingxi;Yao Bin;Wang Liwei(Chengdu Advanced Metal Materials Industrial Technology Research Institute Co.,Ltd.,Chengdu Sichuan 610000,China;State Key Laboratory of Metal Material for Marine Equipment and Application,Anshan Liaoning 114009,China;Pangang Group Jiangyou Changcheng Special Steel Co.,Ltd.,Jiangyou Sichuan 621704,China)

机构地区：[1]成都先进金属材料产业技术研究院股份有限公司,四川成都610000 [2]海洋装备用金属材料及其应用国家重点实验室,辽宁鞍山114009 [3]攀钢集团江油长城特殊钢有限公司,四川江油621704

出　　处：《金属热处理》2022年第3期173-180,共8页Heat Treatment of Metals

摘　　要：借助Thermo-Calc软件对无磁钻铤用Fe-(15~25)Cr-(15~25)Mn-(0~5)Ni-(0~1)Mo-(0~1)N-(0~0.8)C多元系高氮钢在凝固和冷却过程中的相变及析出行为进行研究。使用Thermo-Calc软件中的TCFE9数据库对该钢相图的垂直截面图进行计算,分析了Cr、Mn、Ni、Mo、N及C元素对无磁钻铤用高氮钢凝固及冷却过程中相变的影响,并得到了平衡凝固相变路径图。结果表明,增加Cr、Mn含量可显著提高合金中氮的溶解度,Mo元素可以微弱提高氮的溶解度,Ni、C元素显著降低氮的溶解度。Ni、C和N含量提高可扩大单相奥氏体相区,具有稳定奥氏体的作用,Cr、Mo与Mn元素缩小单相奥氏体相区,具有稳定铁素体的作用。N元素可以促进M_(2)(C,N)相析出,使M_(23)C_(6)相析出受到抑制。Cr、Mn元素可以促进Sigma相析出,C、N元素抑制Sigma相析出。M_(23)C_(6)相的析出主要受C含量的影响,随着C含量的升高,M_(23)C_(6)相的析出温度显著升高。Phase transformation and precipitation behavior of Fe-(15-25)Cr-(15-25)Mn-(0-5)Ni-(0-1)Mo-(0-1)N-(0-0.8)C multicomponent high nitrogen steel for non-magnetic drilling collar during equilibrium solidification were investigated by using Thermo-Calc software.The vertical sections of the phase diagram for this steel were calculated by using the TCFE9 database.Effects of Cr,Mn,Ni,Mo,N and C on phase transformation of the steel during solidification and cooling were analyzed,and the equilibrium solidification phase transformation path diagram was obtained.The results show that increasing Cr and Mn contents can significantly improve the solubility of nitrogen,Mo can slightly improve it,while Ni and C can significantly reduce it.With the increase of Ni,C and N contents,the single-phase austenite phase zone can be enlarged and the austenite can be stabilized.With the increase of Cr,Mo and Mn contents,the single-phase austenite phase zone can be reduced and the ferrite can be stabilized.The nitrogen can promote the precipitation of M_(2)(C,N)phase and inhibit the precipitation of M_(23)C_(6) phase.The Cr and Mn can promote the precipitation of sigma phase,while C and N can inhibit the precipitation of sigma phase.The precipitation of M_(23)C_(6) phase is mainly affected by the content of C,and with the increase of C content,the precipitation temperature of M_(23)C_(6) phase increases significantly.

关 键 词：无磁钻铤 高氮钢 析出行为 相变 凝固 相图计算 

分 类 号：TG142.71[一般工业技术—材料科学与工程]