化学共沉淀工艺对镍包覆碳化钨硬质合金粉体包覆质量的影响
Effects of Chemical Co-precipitation Process on Coating Quality of NickelCoated Tungsten Carbide Cemented Carbide Powder
摘 要
以碳化钨(WC)粉末和NiCl2·6H2O为原料，将化学共沉淀工艺和高温氢气还原工艺相结合制备了镍包覆WC复合粉体(WC-Ni)。对WC-Ni复合粉末的微观形貌、物相组成进行了表征与分析，研究了化学共沉淀工艺对镍包覆WC粉体包覆质量的影响。结果表明：在适当料液浓度、温度和沉淀剂加入体积流量条件下，通过调节晶粒成核速率、粒子间的碰撞几率和颗粒聚集程度，有利于获得分散均匀、包覆致密的WC-Ni粉末。优化工艺条件为0.4 mol·L-1 NiCl2+0.2 mol·L-1(NH4)2C2O4，反应温度50 ℃，沉淀剂加入体积流量0.17 mL·s-1。
化学共沉淀法
团聚
微观形貌
WC cemented carbide powder
chemical co-precipitation method
agglomerate
micro morphology
Abstract
Using tungsten carbide (WC) powder and NiCl2·6H2O as raw materials, nickel coated WC composite powder (WC-Ni) was prepared by combining chemical co-precipitation process and high temperature hydrogen reduction process. The micro morphology and phase composition of WC-Ni composite powder were characterized and analyzed. The effect of chemical co-precipitation process on the effect of nickel coated WC powder was studied. The results show that under the conditions of proper liquid concentration, temperature and precipitant addition volume flow, by adjusting the nucleation rate of crystal grains, the collision probability between particles and the degree of particle aggregation, it was beneficial to obtain uniformly dispersed and densely coated WC-Ni powder. The optimized process conditions were 0.4 mol·L-1 NiCl2+0.2 mol·L-1(NH4)2C2O4, the reaction temperature was 50 ℃, and the addition volume flow of precipitant was 0.17 mL·s-1.
中图分类号 TG135 DOI 10.11973/lhjy-wl202112008
所属栏目 试验与研究
基金项目
收稿日期 2020/12/17
修改稿日期
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备注赵小鹏(1984-),男,高级工程师,主要从事工程材料应用与分析工作,605285229@qq.com
引用该论文: ZHAO Xiaopeng,WANG Yisheng,YANG Hao,MIN Fanlu,ZHANG Jianfeng. Effects of Chemical Co-precipitation Process on Coating Quality of NickelCoated Tungsten Carbide Cemented Carbide Powder[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2021, 57(12): 38～43
赵小鹏,王义盛,杨浩,闵凡路,张建峰. 化学共沉淀工艺对镍包覆碳化钨硬质合金粉体包覆质量的影响[J]. 理化检验－物理分册, 2021, 57(12): 38～43
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参考文献
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【3】蔡海燕.超粗晶硬质合金的研究现状与发展趋势[J].硬质合金, 2018, 35(4):297-303.
【4】YANG G, MING Y Y, LUO B H, et al. Effects of NbC additions on the microstructure and properties of non-uniform structure WC-Co cemented carbides[J].Materials Science and Engineering: A, 2017, 687:259-268.
【5】LIN H, SUN J C, LI C H, et al. A facile route to synthesize WC-Co nanocomposite powders and properties of sintered bulk[J].Journal of Alloys and Compounds, 2016, 682:531-536.
【6】LIU W, SONG X, WANG K, et al. A novel rapid route for synthesizing WC-Co bulk by in situ reactions in spark plasma sintering[J].Materials Science and Engineering: A, 2009, 499:476-481.
【7】SUGIYAMA I, MIZUMUKAI Y, TANIUCHI T, et al. Carbon content dependence of grain growth mode in VC-doped WC-Co hardmetals[J]. International Journal of Refractory Metals and Hard Materials, 2015, 52:245-251.
【8】谷万里.机械球磨法制备Ti3SiC2/Al纳米复合材料[J].复合材料学报, 2006, 23(6):134-137.
【9】侯玉柏, 鲍君峰, 崔颖.高压氢还原制备钴包球形碳化钨的工艺研究[J].热喷涂技术, 2012, 4(3):44-48.
【10】郭圣达, 羊建高, 吕健, 等.喷雾转化法纳米WC-6Co复合粉形貌研究[J].稀有金属, 2015, 39(1):43-48.
【11】LIU Z, JIAN L, TAO W. Preparation of WC-Co composite powder by electroless plating and its application in laser cladding[J].Materials Letters, 2006, 60:1956-1959.
【12】孙业熙, 苏伟, 杨海林, 等.一步还原包裹粉工艺制备WC-Co超粗硬质合金[J].稀有金属材料与工程, 2016, 45(2):409-414.
【13】王玉香, 文小强, 袁德林.共沉淀-喷雾干燥法制备超细WC-Co复合粉的研究[J].世界有色金属, 2019(6):174-175.
【14】吴厚平, 张立, 王元杰, 等.化学包裹粉工艺制备粗晶粒WC-Co硬质合金[J].中国有色金属学报, 2010, 20(4):701-705.
【15】MOHAMMADZADEH H, REZAIE H, SAMIM H, et al. Synthesis of WC-Ni composite powders by thermochemical processing method based on co-precipitation[J].Materials Chemistry and Physics, 2015, 149:145-155.
【16】索鎏敏, 华宁, 韩英, 等.氧化沉淀法制备纳米级Mn3O4粉体及影响因素[J].微纳电子技术, 2009, 46(1):23-28.
【17】张绍岩, 丁士文, 刘淑娟, 等.均相沉淀法合成纳米ZnO及其光催化性能研究[J].化学学报, 2002, 60(7):1225-1229.
【18】黄明雯, 宋鹂, 张金朝.液相沉淀法制备草酸钴粉体的研究[J].无机盐工业, 2008, 40(4):31-34.
【19】刘莹, 王文祥, 李慧颖, 等.草酸盐沉淀法制备钴氧化物超细粉末前驱体[J].湿法冶金, 2017, 36(2):101-105.
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