工程科学学报，第39卷.第1期：61-67,2017年1月 Chinese Journal of Engineering,Vol.39,No.1:61-67,January 2017 D0L:10.13374/j.issn2095-9389.2017.01.008;htp:/journals..usth.edu.cn 基于双亚点阵模型对H13钢中初生碳氮化物的研究 孙晓林12)，王飞)，陈希春)，郭汉杰)四，毛明涛12) 1)北京科技大学冶金与生态工程学院，北京1000832)钢铁研究总院高温材料研究所，北京100081 ☒通信作者，E-mail:guohanjie(@ustb.edu.cn 摘要实验证明H13钢中存在三类初生碳氨化物，包括富V和C的(V,Mox)(C,Ny)、富Ti和N的(Ti,V:-)(C, N,-,)及富V和C的(T,V,-:)(C,N,),部分存在形核核心.基于双亚点阵模型和凝固偏析模型分析计算H13钢凝固过 程中元素含量变化，考虑初生碳氨化物中元素间的相互作用，根据三类碳氨化物中合金元素含量和C/N比值不同，对各碳氮 化物的生成自由能进行分析.理论研究指出富和N的(Ti,V,:)(C,N,)在固相率为0.90时即可生成，而富V和C的 (T,V,.)(C,N,)在固相率大于0.96才可生成，两类碳氮化物的临界生成固相率f均随固溶T和N含量的增加而减小. (V.,Mo1,)(C,N-,)的临界生成固相率与x值密切相关，x减小时f,降低，粒子尺寸增加，实验与理论分析吻合良好.根据 错配度分析氧化物和碳氨化物对H13钢中初生碳氮化物异质形核的作用. 关键词热作模具钢：初生碳氨化物：偏析：亚点阵：成分 分类号TG142.1 Study on primary carbonitrides in H13 steel based on the two-sublattice model SUN Xiao-lin'.2),Wang Fei),CHEN Xi-chun),GUO Han-jie,MAO Ming-tao.) 1)School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)Research Institute for High Temperature Materials,Central Iron and Steel Research Institute,Beijing 100081,China Corresponding author,E-mail:guohanjie@ustb.edu.cn ABSTRACT Three kinds of primary carbonitrides were classified in H13 hot work die steel through experiment,including (V,, Mo)(C,N)rich in V and C,(Ti,,Vi)(C,N rich in Ti and N,and (Ti,,V)(C,,N)rich in V and C,some having a core in the center.The element variation and Gibbs energy of the carbonitrides during H13 solidification were analyzed based on the solidification segregation model and the two-sublattice model,taking the interaction between components into account as well as the alloying element content and C/N ratio of the three types of primary carbonitrides.It is found that Ti-and N-rich (Ti,,V)(C,, N,)forms when the solid fraction reaches 0.9,while the other V-and C-rich (Ti,,V)(C,,N)generates when the solid frac- tion is greater than 0.96 during solidification.The critical solid fraction for the formation of these two (Ti,,V)(C,,N)decrea- ses with increasing Ti and N contents soluted in the carbonitrides.The formation of (V,,Mo)(C,,N)during solidification can be affected by the x value.The critical solid fraction decreases as less vanadium is soluted in(V,,Mo)(C,,N),leading to lar- ger size carbonitrides demonstrated by the models,which fit well with experimental data.The influence of oxides and carbonitrides on heterogeneous nucleation for the carbonitrides was also researched through lattice misfitting analysis. KEY WORDS hot die steel;carbonitrides;segregation;sublattices;composition 合金元素M(M=Nb,V,Ti,Mo等)与间隙原子X 方结构，晶格常数相近可以互溶为多元合金碳氨化物. (X=C,N)结合形成MX,大部分为NaCl型的面心立 钢中析出细小的纳米碳化物可以起到沉淀强化的作 收稿日期：2015-12-28 基金项目：国家自然科学基金资助项目(51541402,51274031)工程科学学报,第 39 卷,第 1 期:61鄄鄄67,2017 年 1 月 Chinese Journal of Engineering, Vol. 39, No. 1: 61鄄鄄67, January 2017 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2017. 01. 008; http: / / journals. ustb. edu. cn 基于双亚点阵模型对 H13 钢中初生碳氮化物的研究 孙晓林1,2) , 王 飞2) , 陈希春2) , 郭汉杰1) 苣 , 毛明涛1,2) 1) 北京科技大学冶金与生态工程学院, 北京 100083 2) 钢铁研究总院高温材料研究所, 北京 100081 苣 通信作者,E鄄mail: guohanjie@ ustb. edu. cn 摘 要 实验证明 H13 钢中存在三类初生碳氮化物,包括富 V 和 C 的(Vx,Mo1 - x) (Cy,N1 - y )、富 Ti 和 N 的(Ti x,V1 - x ) (Cy, N1 - y)及富 V 和 C 的(Ti x,V1 - x)(Cy,N1 - y),部分存在形核核心. 基于双亚点阵模型和凝固偏析模型分析计算 H13 钢凝固过 程中元素含量变化,考虑初生碳氮化物中元素间的相互作用,根据三类碳氮化物中合金元素含量和 C/ N 比值不同,对各碳氮 化物的生成自由能进行分析. 理论研究指出富 Ti 和 N 的(Ti x,V1 - x)(Cy,N1 - y)在固相率为 0郾 90 时即可生成,而富 V 和 C 的 (Ti x,V1 - x)(Cy,N1 - y)在固相率大于 0郾 96 才可生成,两类碳氮化物的临界生成固相率 fP均随固溶 Ti 和 N 含量的增加而减小. (Vx,Mo1 - x)(Cy,N1 - y)的临界生成固相率与 x 值密切相关,x 减小时 fP降低,粒子尺寸增加,实验与理论分析吻合良好. 根据 错配度分析氧化物和碳氮化物对 H13 钢中初生碳氮化物异质形核的作用. 关键词 热作模具钢; 初生碳氮化物; 偏析; 亚点阵; 成分 分类号 TG142郾 1 Study on primary carbonitrides in H13 steel based on the two鄄sublattice model SUN Xiao鄄lin 1, 2) , Wang Fei 2) , CHEN Xi鄄chun 2) , GUO Han鄄jie 1) 苣 , MAO Ming鄄tao 1, 2) 1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 2) Research Institute for High Temperature Materials, Central Iron and Steel Research Institute, Beijing 100081, China 苣 Corresponding author, E鄄mail: guohanjie@ ustb. edu. cn ABSTRACT Three kinds of primary carbonitrides were classified in H13 hot work die steel through experiment, including (Vx, Mo1 - x)(Cy,N1 - y) rich in V and C, (Ti x,V1 - x)(Cy,N1 - y) rich in Ti and N, and (Ti x,V1 - x) (Cy,N1 - y) rich in V and C, some having a core in the center. The element variation and Gibbs energy of the carbonitrides during H13 solidification were analyzed based on the solidification segregation model and the two鄄sublattice model, taking the interaction between components into account as well as the alloying element content and C/ N ratio of the three types of primary carbonitrides. It is found that Ti鄄 and N鄄rich (Ti x,V1 - x)(Cy, N1 - y) forms when the solid fraction reaches 0郾 9, while the other V鄄 and C鄄rich (Ti x,V1 - x)(Cy,N1 - y) generates when the solid frac鄄 tion is greater than 0郾 96 during solidification. The critical solid fraction for the formation of these two (Ti x,V1 - x)(Cy,N1 - y) decrea鄄 ses with increasing Ti and N contents soluted in the carbonitrides. The formation of (Vx,Mo1 - x)(Cy,N1 - y) during solidification can be affected by the x value. The critical solid fraction decreases as less vanadium is soluted in (Vx,Mo1 - x)(Cy,N1 - y), leading to lar鄄 ger size carbonitrides demonstrated by the models, which fit well with experimental data. The influence of oxides and carbonitrides on heterogeneous nucleation for the carbonitrides was also researched through lattice misfitting analysis. KEY WORDS hot die steel; carbonitrides; segregation; sublattices; composition 收稿日期: 2015鄄鄄12鄄鄄28 基金项目: 国家自然科学基金资助项目(51541402,51274031) 合金元素 M (M = Nb,V,Ti,Mo 等)与间隙原子 X (X = C,N)结合形成 MX,大部分为 NaCl 型的面心立 方结构,晶格常数相近可以互溶为多元合金碳氮化物. 钢中析出细小的纳米碳化物可以起到沉淀强化的作