铸造2026，Vol.75Issue(7)：807-816,10.DOI:10.27014/j.cnki.zhuzao.2026.0103
隔片-孕育剂复合孕育工艺对D2钢铸态组织与偏析的改善
Improvement of As-Cast Micro structure and Segregation of D2 Steel by Spacer-Inoculant Composite Inoculation Process
摘要
Abstract
D2 steel(Chinese national standard grade:Cr12Mo1V1)is a high-carbon and high-chromium ledeburitic die steel,which has excellent hardenability and wear resistance and is widely used in the field of die manufacturing.However,its high carbon and chromium content easily leads to the uneven precipitation of eutectic carbides during the smelting and solidification processes,thereby affecting the mechanical properties and processing performance of the material.In this study,casting experiments were carried out,combined with metallographic microscope analysis and scanning electron microscope(SEM)observation technology,to systematically explore the regulatory effect of the composite inoculation process of spacers combined with inoculants on the as-cast microstructure of D2 steel,and clarify the mechanism of this process in grain refinement,improvement of element segregation and optimization of carbide distribution.The experimental results show that the single inoculant treatment has a limited effect on the overall grain refinement of the castings;the casting process with spacers can effectively refine the grain size,and different spacer thicknesses have significant differences in the grain refinement effect;the composite inoculation process with the synergistic effect of spacers and inoculants has the best grain refinement effect on the as-cast grains of D2 steel.Among them,the grain size of the optimal process group is reduced by 76％compared with that of the castings produced by the traditional casting process,which significantly improves the uniformity of the as-cast microstructure.关键词
D2钢/Cr12Mo1V1钢/复合孕育工艺/孕育剂/铸态组织/晶粒细化/元素偏析/共晶碳化物Key words
D2 steel/Cr12Mo1V1 steel/composite inoculation process/inoculant/as-cast microstructure/grain refinement/element segregation/eutectic carbide分类
矿业与冶金引用本文复制引用
宋嘉成,邓沛然,董玮,王宇轩,欧嘉林,孙佳..隔片-孕育剂复合孕育工艺对D2钢铸态组织与偏析的改善[J].铸造,2026,75(7):807-816,10.基金项目
上海市高峰学科(0235-A1-5300-24-090802-高水平-高峰学科-材料科学与工程). （0235-A1-5300-24-090802-高水平-高峰学科-材料科学与工程）
