新型复合(Cr,Mo)_(2)(C,N)细化剂粉末的制备研究  

Study on Preparation of Novel Composite(Cr,Mo)_2(C,N) Refiner Powders

作　　者：陈振磊 马世卿 王晓宇 王鑫 严斌 杨治刚 CHEN Zhenlei;MA Shiqing;WANG Xiaoyu;WANG Xin;YAN Bin;YANG Zhigang(School of Materials Science and Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Hebei Key Laboratory of Advanced Materials for Transportation Engineering and Environment,Shijiazhuang 050043,China)

机构地区：[1]石家庄铁道大学材料科学与工程学院,河北石家庄050043 [2]河北省交通工程与环境协同发展新材料重点实验室,河北石家庄050043

出　　处：《热加工工艺》2023年第19期32-35,42,共5页Hot Working Technology

基　　金：国家自然科学基金资助项目(51804202);河北省自然科学基金资助项目(E2019210295);石家庄铁道大学大学生创新创业训练计划项目(S202110107033)。

摘　　要：以Cr_(2)O_(3)、MoO_(3)和炭黑等为原料,采用碳热还原氮化法在流动N_(2)气氛中合成了新型复合(Cr,Mo)_(2)(C,N)细化剂粉末。采用TG-DSC、XRD和SEM等研究了反应温度、保温时间和Mo含量对制备(Cr,Mo)_(2)(C,N)细化剂的影响规律。得出以下结论:随温度升高,物相演变遵从(MoO_(3),Cr_(2)O_(3))→(Cr_(2)O_(3),Mo_(2)C,Cr_(3)C_(2))→(Cr,Mo)_(2)(C,N)的规律;延长保温时间,(Cr,Mo)_(2)(C,N)的结晶度不断变大,粉末粒径不断长大;随着钼含量的增加,(Cr,Mo)_(2)(C,N)的晶胞体积不断膨胀,粉末粒径不断减小。A new composite(Cr,Mo)_2(C,N) refiner powder was synthesized by carbothermal reduction nitridation method in flowing N_(2) atmosphere with Cr_2O_3,MoO_(3) and carbon black as raw materials.The effects of reaction temperature,holding time and Mo content on the preparation of(Cr,Mo)_2(C,N) refiner were studied by TG-DSC,XRD and SEM.The following conclusions are obtained:with the increase of temperature,the phase evolution follows the rule of(MoO_3,Cr_2O_3) →(Cr_2O_3,Mo_2C,Cr_3C_2)→(Cr,Mo)_2(C,N);the crystallinity of(Cr,Mo)_2(C,N) is improved and the particle size of(Cr,Mo)_2(C,N) powder is increased with prolonging holding time;with the increase of Mo content,the cell volume of(Cr,Mo)_2(C,N) expands and the particle size decreases.

关 键 词：晶粒细化剂 碳氮化铬钼 碳热还原氮化 相演变 

分 类 号：TG223[金属学及工艺—铸造]