铌含量对H13钢枝晶偏析及碳化物组成和形貌的影响
Effect of Nb Content on Dendrite Segregation and Carbide Composition and Morphology of H13 Steel
摘 要
采用真空感应炉制备含有不同质量分数(0,0.17%,0.38%)铌的H13钢,研究了铌含量对该钢枝晶偏析及共晶碳化物组成和形貌的影响。结果表明:加入铌可以显著细化H13钢的组织,并降低枝晶间碳化物形成元素的偏析;随铌含量的增多,共晶碳化物数量和尺寸显著增加,其形貌由块状或长条状向层片状或鱼骨状转变;碳化物主要为M7C3、M23C6、M6C及MC,随铌含量的增多,M7C3和M23C6型碳化物数量减少,M6C和MC型碳化物数量增多,MC型碳化物由以VC为主转变为以NbC和VC为主,且MC型碳化物的析出温度显著提高。
铌
枝晶偏析
共晶碳化物
H13 steel
Nb
dendrite segregation
eutectic carbide
Abstract
H13 steel with different mass fractions (0,0.17%,0.38%) of Nb was prepared with vacuum induction furnace. The effect of Nb content on dendrite segregation, and eutectic carbide composition and morphology of H13 steel was studied. The results show that adding Nb could significantly refined the structure of H13 steel and reduce the segregation of the forming elements of interdendritic carbides. With the increase of Nb content, the number and size of eutectic carbides increased significantly, and their morphology changed from blocky or long strip to lamellar or fishbone. The carbides were M7C3, M23C6, M6C and MC. With the increase of Nb content, the number of M7C3 and M23C6 type carbides decreased while the number of M6C and MC type carbides increased; MC type carbides changed from VC to NbC and VC, and the precipitation temperature of MC type carbides increased significantly.
中图分类号 TG142.1 DOI 10.11973/jxgccl202212007
所属栏目 试验研究
基金项目 宁波市科技计划项目(2018B10003);中信铌钢发展奖励基金资助项目
收稿日期 2021/10/22
修改稿日期 2022/10/30
网络出版日期
作者单位点击查看
联系人作者高鹏副教授
备注欧阳伟豪(1996-),男,辽宁本溪人,硕士研究生
引用该论文: OUYANG Weihao,ZHOU Jian,GAO Peng,CHI Hongxiao,XIE Guanli,WANG Wenjun. Effect of Nb Content on Dendrite Segregation and Carbide Composition and Morphology of H13 Steel[J]. Materials for mechancial engineering, 2022, 46(12): 43～49
欧阳伟豪,周健,高鹏,迟宏宵,谢官利,王文军. 铌含量对H13钢枝晶偏析及碳化物组成和形貌的影响[J]. 机械工程材料, 2022, 46(12): 43～49
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【3】CHANGS H,TANGT P,HUANGK T.Improvement of aluminum erosion behavior and corrosion resistance of AISI H13 tool steel by oxidation treatment[J].ISIJ International,2010,50(4):569-573.
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