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将E2和E5消失模涂料按不同体积比混合成新的消失模涂料,对其相关性能进行研究。找出适合大型铸铁件生产的消失模涂料混合比例,并在生产上验证和使用,获得令人满意的效果。 相似文献
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以锆铝石粉为耐火骨料,酚醛树脂和硅溶胶混合使用做粘结剂,CMC和钠基膨润土混合使用做悬浮剂,采用异丙醇作载体,开发出消失模铸钢醇基涂料。通过试验确定了消失模铸钢醇基涂料的最佳配比,并对涂料综合性能进行了测试。 相似文献
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消失模铸造水基涂料的研制 总被引:1,自引:0,他引:1
为降低消失模铸造涂料的成本,研制了铸铁件水基消失模涂料.采用石英粉和石墨为耐火料,以硅溶胶和聚乙烯醇(简称PVA)为复合粘结剂,以钠基膨润土和羧甲基纤维素(简称CMC)为复合悬浮剂,通过实验确定了涂料的最佳配方,并考察了涂料的多种性能,进行了生产应用.结果表明:该涂料性能优良,成本低廉.具有一定的推广价值. 相似文献
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本文介绍碳素醇基涂料在冷硬树脂砂铸铁件上应用的配方、配制工艺及使用效果。该涂料的特点是成本低(成本比锆英粉涂料降低71%),技术性能符合树脂砂要求,耐高温、强度高、悬浮性好、复盖能力强。是应用于冷硬树脂砂铸铁件型(芯)上的好涂料. 相似文献
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本文介绍铸铁湿型铸造中的型腔表面使用的喷涂涂料,该涂料可有效的防止粘砂、掉砂、冲砂等铸造缺陷。铸件表面质量明显提高。 相似文献
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U.C. Nwaogu T. PoulsenR.K. Stage C. BischoffN.S. Tiedje 《Surface & coatings technology》2011,205(16):4035-4044
Foundry refractory coatings protect bonded sand cores and moulds from producing defective castings during the casting process by providing a barrier between the core and the liquid metal. In this study, new sol-gel refractory coating on phenolic urethane cold box (PUCB) core was examined. The coating density, viscosity, moisture content and wet and dry weight of the coating were evaluated on cores that had been coated at three different dip-coating times. The coating coverage, surface appearance and depth of penetration into the cores were examined with a Stereomicroscope. Gray iron castings were produced with sol-gel coated and uncoated cores and the results were related to the coating properties. The casting results were also compared with castings made with cores coated with commercial alcohol-based and water-based foundry coatings. The analyses show that castings produced with sol-gel coated cores have better surface quality than those from uncoated cores and comparable surface quality with the commercial coatings. Therefore, the new sol-gel coating has a potential application in the foundry industry for improving the surface finish of castings thereby reducing the cost of fettling in the foundry industry since the raw materials and technology are easily affordable. 相似文献
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通过分析轴套铸件铸造难点,确定合理铸造工艺:采用顶部环形冒口,使冒口延续度达到100%,避免缩孔、缩松产生;采用底部间接外冷铁工艺,延长冒口补缩距离,使铸件获得自下而上的顺序凝固,获得组织致密铸件;采用铸件表面全敷铬铁矿砂工艺,提高表面质量。通过对各化学成分精准控制,获得力学性能达标的铸件。 相似文献
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对铸钢湿型砂醇基涂料进行了试验研究,得到一种合适的涂料配方。实际应用表明,本涂料喷涂后成膜性能好,不开裂、不起皮,常温和高温强度高,高温抗裂性好,发气量低。采用该涂料喷涂铸型并浇注铸钢摇枕和侧架,铸件无粘砂现象且表面光洁。 相似文献
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粘土砂湿型铸造,铸件表面容易产生粘砂.某厂采用粘土砂湿型生产拖拉机铸件,也遇到了铸件表面粘砂的问题.通过不断选择醇基涂料悬浮剂,调整涂料的配比,最后采用SN-1悬浮剂,经试验和应用取得较好的效果. 相似文献