细直径型腔中灰铸铁铁液充型能力研究.pdfVIP

维普资讯 学兔兔 Mar．2008 铸 造 VoI．57 No．3 FOUNDRY ·287· 细直径型腔中灰铸铁铁液充型能力研究 唐 桢，徐锦锋，翟 波 (西安理工大学材料科学与工程学院，陕西西安710048) 摘要：结合Flemings提出的液态合金停止流动机理与凝固理论，建立了细直径型腔中灰铸铁铁液充型能力的计算模 型。采用该模型理论预测了灰铸铁铁液的充型能力，并采用正交试验方法，研究了浇注温度、铸型温度、压头高度和 型腔截面半径对铁液充型能力的影响规律。结果表明，新建理论模型能够较好地预测灰铸铁铁液在细直径型腔中的充 型能力，预测结果与试验结果相吻合，发现影响充型能力的各因素的显著性由高到低依次为：型腔截面半径、浇注温 度、压头高度、铸型温度。 关键词：细直径型腔；灰铸铁；充型能力；计算模型 中图分类号：TG21 1 文献标识码：A 文章编号：1001—4977(2008)03—0287—04 Study on Filling Capacity of Liquid Gray Iron in a SmalI Diameter Mould TANG Zhen，XU Jin—feng，ZHAI Bo (School of Materials Science and Engineering，Xian University of Technology，Xi。an 710048，China) Abstract~A filling capacity computing model of liquid gray iron in a small diameter mould was established by combining stoppage mechanism of liquid alloy flow with the solidification theory．The filling capacity of the liquid gray iron was predicted theoretically using this mode1．Orthogonal test method was applied to study the effect of some factors on the filling capacity of liquid gray iron．The results showed that the novel model can be used to predict the filling capacity of liquid iron in small diameter mould and the experimental data is in agreement with the theoretical analysis． It is found that the sequence—based factors affecting filling capacity is radius of mould，pouring temperature，fall head and mould temperature． Key words：small diameter mould；gray iron；filling capacity；computing model 目前，铸铁件焊补大多采用铸铁芯焊条或异质焊 本研究中，根据Flemings提出的液态合金停止流 条，但只有铸铁同质焊材才可满足铸铁件