不同标号石蜡对硬质合金粉末成型性及后续工艺过程的影响
|
摘要
选取常用作硬质合金成型的不同标号石蜡,采用测量压坯的分层单重、压坯的横向断裂强度、转鼓实验以及压坯压制压力等方法表征各石蜡的成型性;采用差热分析对各石蜡进行热失重试验比较不同石蜡的灰分及气化温度;最后通过烧结后合金的性能比较不同石蜡对合金性能的影响。试验结果表明不同的石蜡对硬质合金混合料的成型性存在差异,国产52#石蜡最易成型,国产56#石蜡粘结强度最高,有利于后续加工。各石蜡脱除后残留物都很少,国产48#石蜡脱除过程较缓慢,有利于大件制品生产。各种石蜡对合金力学性能不存在明显的影响。对石蜡成型剂的系统研究,将利于优化硬质合金成型工艺。
Different types of paraffin wax used for cemented carbide forming were selected. The layered single weight of the compact, the transverse rupture strength of the compact, the drum test and the compacting pressure were used to characterize the formation of each type of paraffin wax. Differential thermal analysis was used. The ash and gasification temperature of different paraffin wax were compared by thermal weight loss test of each type of paraffin wax. Finally, the properties of the alloys after sintering were compared with the effects of different paraffin wax on the properties of the alloys.The results show that the different paraffin wax has different moldability to the cemented carbide mixture. The domestic 52#paraffin wax is the most easy to form, and the domestic 56# paraffin wax has the highest bond strength, which is beneficial to the subsequent processing. After the removal of each paraffin wax, there are few residues, and the domestic 48# paraffin wax removal process is slow, which is beneficial to the production of large products. Various paraffin waxes have no significant effect on the mechanical properties of the alloy. Systematic research on paraffin wax molding agents will optimize the cemented carbide molding process.
Different types of paraffin wax used for cemented carbide forming were selected. The layered single weight of the compact, the transverse rupture strength of the compact, the drum test and the compacting pressure were used to characterize the formation of each type of paraffin wax. Differential thermal analysis was used. The ash and gasification temperature of different paraffin wax were compared by thermal weight loss test of each type of paraffin wax. Finally, the properties of the alloys after sintering were compared with the effects of different paraffin wax on the properties of the alloys.The results show that the different paraffin wax has different moldability to the cemented carbide mixture. The domestic 52#paraffin wax is the most easy to form, and the domestic 56# paraffin wax has the highest bond strength, which is beneficial to the subsequent processing. After the removal of each paraffin wax, there are few residues, and the domestic 48# paraffin wax removal process is slow, which is beneficial to the production of large products. Various paraffin waxes have no significant effect on the mechanical properties of the alloy. Systematic research on paraffin wax molding agents will optimize the cemented carbide molding process.
引文
[1]王国栋.硬质合金生产原理[M].北京:冶金工业出版社,1990.Wang Guodong. Theory of producing cemented carbide[M]. Beijing:Metallurgical Industry Press, 1990.
[2]郑国梁,郑彬.硬质合金成形剂的现状与发展趋势[J].稀有金属与硬质合金, 1992,109,(2):39-41.Zheng Guoliang, Zheng Bin. The actuality and development trend of binder for hard metal[J]. Rare Metals and Cemented Carbides, 109,(2):39-41.
[3]周兴灵,彭卫珍,周书助.硬质合金用成型剂现状和发展的探讨[J].湖南冶金职业技术学院学报,2008,8(4):108-111.Zhou Xinglin, Peng Weizhen, Zhou Shuzhu. Discussion about present research and development of cemented carbide binder[J]. Journal of Hunan Metallurgical Professional Technology College, 2008, 8(4):108-111.
[4]孙卫权,孙丹,白佳声.硬质合金用的几种石蜡成型剂的对比研究[J].硬质合金,2011,28(1):29-33.Sun Weiquan, Sun Dan, Bai Jiasheng. Comparative research on properties of four kinds of wax binder for cemented carbide[J]. Cemented Carbide, 2011, 28(1):29-33.
[5]唐楷,颜杰,黄新,等.新型石蜡基成形剂的应用性实验研究[J].硬质合金,2008,25(1):28-31.Tang Kai, Yan Jie, Huang Xin, et al. Study on application experiments of novel wax binder[J]. Cemented Carbide, 2008, 25(1):28-31.
[6]黄伟,刘志. SD成型剂在硬质合金生产上的应用研究[J].四川冶金,2015,37(4):1-4.Huang Wei, Liu Zhi. Research on application technology of SD pressing binder in cemented carbide production[J]. Sichuan Metallurgy,2015, 37(4):1-4.
[7]Wadsworth I, Smith I J, Donohue L A, et al. Thermal stability and oxidation resistance of TiAlN/CrN multilayer coatings[J]. Surface and Coating Technology, 1997, 94-95:315-321.
[8]廖寄乔.粉末冶金实验技术[M].长沙:中南大学出版社,2003:243-257.Liao Jiqiao. Experiment technique of powder metallurgy[M]. Changsha:Central South University Press, 2003:243-257.
[2]郑国梁,郑彬.硬质合金成形剂的现状与发展趋势[J].稀有金属与硬质合金, 1992,109,(2):39-41.Zheng Guoliang, Zheng Bin. The actuality and development trend of binder for hard metal[J]. Rare Metals and Cemented Carbides, 109,(2):39-41.
[3]周兴灵,彭卫珍,周书助.硬质合金用成型剂现状和发展的探讨[J].湖南冶金职业技术学院学报,2008,8(4):108-111.Zhou Xinglin, Peng Weizhen, Zhou Shuzhu. Discussion about present research and development of cemented carbide binder[J]. Journal of Hunan Metallurgical Professional Technology College, 2008, 8(4):108-111.
[4]孙卫权,孙丹,白佳声.硬质合金用的几种石蜡成型剂的对比研究[J].硬质合金,2011,28(1):29-33.Sun Weiquan, Sun Dan, Bai Jiasheng. Comparative research on properties of four kinds of wax binder for cemented carbide[J]. Cemented Carbide, 2011, 28(1):29-33.
[5]唐楷,颜杰,黄新,等.新型石蜡基成形剂的应用性实验研究[J].硬质合金,2008,25(1):28-31.Tang Kai, Yan Jie, Huang Xin, et al. Study on application experiments of novel wax binder[J]. Cemented Carbide, 2008, 25(1):28-31.
[6]黄伟,刘志. SD成型剂在硬质合金生产上的应用研究[J].四川冶金,2015,37(4):1-4.Huang Wei, Liu Zhi. Research on application technology of SD pressing binder in cemented carbide production[J]. Sichuan Metallurgy,2015, 37(4):1-4.
[7]Wadsworth I, Smith I J, Donohue L A, et al. Thermal stability and oxidation resistance of TiAlN/CrN multilayer coatings[J]. Surface and Coating Technology, 1997, 94-95:315-321.
[8]廖寄乔.粉末冶金实验技术[M].长沙:中南大学出版社,2003:243-257.Liao Jiqiao. Experiment technique of powder metallurgy[M]. Changsha:Central South University Press, 2003:243-257.