| 喷雾干燥-直接碳化法制备WC-Co复合粉末 |
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| 引用本文： | 汤昌仁,易茂中,谭兴龙.喷雾干燥-直接碳化法制备WC-Co复合粉末[J].粉末冶金技术,2010,28(4). |
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| 作者姓名： | 汤昌仁 易茂中 谭兴龙 |
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| 作者单位： | 中南大学粉末冶金国家重点实验室,长沙,410083 |
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| 摘 要： | 在高性能WC-Co的制备中,WC与Co均匀混合和C含量的严格控制具有重要意义。以偏钨酸铵、乙酸钴、重铬酸铵和炭黑为原料,通过喷雾干燥和直接还原碳化法制备WC-Co复合粉末,然后在钼丝炉中通入氢气对前驱体进行还原碳化制备WC-Co复合粉末。对制备好的WC-Co进行总碳含量测定,用X射线衍射进行相分析。研究了喷雾法制备WC复合粉末形貌粒度及碳化温度、碳化时间、配碳量对WC-Co粉末总碳量的影响。结果表明:WC复合粉末为球形粉末,平均颗粒度为50μm;当碳化温度在950℃、碳化时间为3.5h、配碳量为9%时,所得WC-Co复合粉末中WC与Co达到均匀的分布,且其实际总碳含量达到理论总碳量5.79%。
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| 关 键 词： | 喷雾干燥 总碳量 配碳量 碳化温度 |
Preparation of WC-Co composite powder by spray-drying and direct carbonization method |
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| Tang Changren,Yi Maozhong,Tan Xinglong.Preparation of WC-Co composite powder by spray-drying and direct carbonization method[J].Powder Metallurgy Technology,2010,28(4). |
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| Authors: | Tang Changren Yi Maozhong Tan Xinglong |
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| Affiliation: | Tang Changren,Yi Maozhong,Tan Xinglong(State Key Laboratory for Powder Metallurgy,Central South University,Changsha 410083,China) |
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| Abstract: | It is significant to mixing WC and Co evenly and control the content of carbon strictly in the prearation of high performance WC-Co.AMT,(CH3COO)2Co,(NH4)2Cr2O7,and carbon black were used as raw materials.WC-Co precursor powder was prepared by spray-drying,and then WC-Co composite powder was prepared by deoxidizing and carbonizing the powder precursor in the atmosphere of H2 in Mo wire furnance.The total carbon content of the alloy powder was measured,and the phase of the powder was anylysed by XRD.The morph... |
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| Keywords: | spray drying total carbon content carbon addition carbonization temperature |
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