超细Cr_(3)C_(2)粉体的制备及其在WC-10Co-0.5Cr_(3)C_(2)硬质合金中的应用研究  

The Preparation of Ultrafine Cr_(3)C_(2) Powder and its Application in WC-10Co-0.5Cr_(3)C_(2) Cemented Carbide

作　　者：陈金清[1] 高茜 何人桂 李亚军 CHEN Jinqing;GAO Xi;HE Rengui;LI Yajun(Faculty of Metallurgical Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China;Institute of Jiangxi Tungsten and Rare Earth,Ganzhou 341000,Jiangxi,China;School of Chemistry and Chemical Engineering,Gannan Normal University,Ganzhou 341000,Jiangxi,China)

机构地区：[1]江西理工大学材料冶金化学学部,江西赣州341000 [2]江西省钨与稀土研究院,江西赣州341000 [3]赣南师范大学化学化工学院,江西赣州341000

出　　处：《中国钨业》2024年第5期46-55,共10页China Tungsten Industry

基　　金：江西省教育厅科学技术研究项目(GJJ211440);赣州市科技计划项目(2023PGX17232,202101125020)。

摘　　要：本研究探索了一种在高温旋转管式炉中以Cr_(2)O_(3)和炭黑为原料,在氢气气氛中碳热还原-碳化连续高效制备超细Cr_(3)C_(2)粉体的方法。试验研究了反应温度、保温时间、氢气流量等因素对制备Cr_(3)C_(2)粉体的组成、形貌、粒度以及总碳(C_(t))、氧(O)含量的影响。结果表明:在温度为1150℃、保温时间为10 min、氢气流量为1.40 L/min条件下,制备了平均粒度为0.75μm的Cr_(3)C_(2)粉体。将本试验制得的Cr_(3)C_(2)粉体应用于WC-10Co-0.5Cr_(3)C_(2)硬质合金制备过程,并与市售Cr_(3)C_(2)对比发现,本试验制备的Cr_(3)C_(2)粉体可以更有效地抑制硬质合金烧结过程中WC晶粒的异常长大。This study explores a continuous and efficient carbothermal reduction-carburization synthesis method for ultrafine Cr_(3)C_(2)powders using Cr_(2)O_(3)and carbon black as raw materials in a high-temperature rotary tube furnace under hydrogen atmosphere.The effects of reaction temperature,holding time,and hydrogen flow rate on the composition,morphology,particle size,total carbon(C_(t))content,and oxygen(O)content of the synthesized Cr_(3)C_(2)powders were systematically investigated.The results demonstrated that Cr_(3)C_(2)powders with an average particle size of 0.75μm were successfully prepared under optimized conditions of 1150℃reaction temperature,10-minute holding time,and 1.40 L/min hydrogen flow rate.When applied to the preparation of WC-10Co-0.5Cr_(3)C_(2)cemented carbide,comparative analysis with commercially available Cr_(3)C_(2)revealed that the synthesized Cr_(3)C_(2)powders exhibited superior effectiveness in suppressing abnormal grain growth of WC during the sintering process.This enhanced performance highlights the technological advantages of the proposed synthesis method in producing high-quality carbide additives for advanced hard alloy applications.

关 键 词：超细 Cr_(3)C_(2)粉体 碳热还原-碳化 高温旋转管式炉 硬质合金 

分 类 号：TF123[冶金工程—粉末冶金]