铌对高碳钢共析转变和退火组织的影响  

Effects of Niobium on Eutectoid Transformation and Annealing Microstructure of High Carbon Steel

作　　者：王浩云 曹建春[1] 阴树标[2] 刘星 卢超 薛焱明 WANG Haoyun;CAO Jianchun;YIN Shubiao;LIU Xing;LU Chao;XUE Yanming(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;Faculty of Mctallurgical and Energy Engineering,Kunming University of Seience and Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]昆明理工大学冶金与能源工程学院,云南昆明650093

出　　处：《昆明理工大学学报（自然科学版）》2023年第2期21-30,40,共11页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：中信-CBMM铌钢研究与开发项目(2017FWNB-3079)。

摘　　要：通过对不同成分的高碳钢进行不同温度的退火处理,研究了铌对高碳钢共析转变和退火组织的影响,确定了固溶Nb含量与共析点含碳量的关系式.研究结果表明,Nb会使高碳钢的共析点右移,碳含量为0.77%和0.86%的钢在退火处理后出现不同含量的先共析铁素体组织,同时Nb的加入会改变珠光体形貌,促进珠光体球化,拓宽了原有钢种的球化温度范围.The effect of niobium on the eutectoid transformation and annealing microstructure of high cabon steel is studied and the relationship between the content of solid solution Nb and the carbon content at the eutectoid point is determined by annealing high carbon steels of different compositions with different processes.The re-search results show that Nb shifts the eutectoid point to the right during the eutectoid transformation of high car-bon steel,and there are proeutectoid ferrite with different contents in the steels with carbon content of 0.77%and 0.86%after annealing.The addition of Nb changes the morphology of pearlite,promotes the spheroidization of pearlite,and broadens the spheroidizing temperature range of the steels.

关 键 词：共析转变 退火组织 先共析铁素体 固溶Nb 共析点含碳量 

分 类 号：TG142.31[一般工业技术—材料科学与工程] TG156.2[金属学及工艺—金属材料]