辽宁省建平县富山石粉厂——铸造用醇基涂料悬浮剂-锂基膨润土 ：水基涂料增稠防沉剂-钠基膨润土

锂基膨润土在醇基溶液中有高度分散性、粘稠性、流变性、触变性及很强的悬浮性，能有效地将溶液中其它耐火材料分散并悬浮起来，防止溶质沉淀及分层。是生产铸造醇基涂料的优质悬浮剂。采用锂基膨润土为悬浮剂配制的醇基快干涂料，具有不沉淀、分散性高，快干、强度高，无污染，铸件表面光洁度高的特点。     

锂基膨润土的制备及其在铸造涂料中的应用

概述了锂基膨润土的制备过程。通过X射线衍射、差热分析及热失重分析,对钙基膨润土和锂基膨润土的矿物结构和失水特征进行了分析,并测试了膨润土的悬浮度;同时介绍了采用锂基膨润土作悬浮剂所制铸造涂料的配制工艺、性能和使用效果。结果表明,制备的锂基膨润土在醇溶剂中悬浮性良好,可缩短铸造涂料的生产周期,并降低生产成本。     

速溶型醇基快干铸钢涂料的研制

本涂料使用醇基膨润土和高稠化能力的交联型聚乙烯醇缩丁醛作稠化剂,配成的载体为软胶型屈服──假塑性流体。用少量水、甲醇或丙酮调节涂料的悬浮性能、燃烧性能和流变性质。使用不同的耐火基材可以配制出多种烧结剥离型涂料。用刚玉粉、锆英粉、石英粉等配制速溶型醇基快干涂料,在浇注合金钢和普通碳素钢铸件上都取得了良好的抗粘砂效果,提高了表面质量。本涂料预制成粉状,使用时先加少量水和甲醇或丙铜活化,然后添加适量酒精进行研磨,即得良好悬浮性能的醇基快干涂料。     

有机膨润土浆制醇基快干涂料

用活性剂A将普通膨润土处理成有机膨润土浆,其膨润值、沉降系数、静切力限趋于稳定,能满足醇基快干涂料悬浮稳定性要求。该浆比市售有机膨润土悬浮力强。处理工艺简单,价格低廉。用它配制的醇基快干涂料性能好,可用于生产碳钢、合金钢及铸铁件。铸件表面光洁,已被十几家工厂采用     

醇基涂料涂刷性能影响因素研究

配制了醇基刷涂涂料,通过正交试验,测试了凹凸棒土、锂基膨润土、聚乙烯醇羧丁醛(PVB)、酚醛树脂、有机硅表面活性剂、脂肪醇聚氧乙烯醚的加入量不同时醇基涂料的涂刷指数,分析凹凸棒土、锂基膨润土、聚乙烯醇缩丁醛(PVB)、酚醛树脂、有机硅表面活性剂、脂肪醇聚氧乙烯醚对涂刷指数的影响,为进一步改善涂料的涂刷性能做好重要的工作。     

水基、醇基快干锆英粉涂料的研制和应用

作者应用胶体化学原理,研制成一种人工合成的锂基膨润土,它是水基、醇基涂料的良好悬浮剂。锂基膨润土适用性广,与多种耐火材料均能制成水基、醇基涂料。大隆机器厂生产的出口阀门铸钢件,应用该涂料,铸件表面质量令人满意。     

悬浮剂对覆膜砂醇基涂料工艺性能的影响

良好的悬浮剂能有效地保证涂料各组分的均一性，充分发挥涂料的作用，而且还有利于施涂，提高涂层和铸件的表面质量。通过悬浮剂种类和悬浮剂含量两个指标研究其对覆膜砂醇基涂料工艺性能的影响。结果表明：选取进口钠基膨润土做悬浮剂配制的涂料，与锂基膨润土、硅酸镁铝、ATT50、球粘土配制的涂料相比，具有更好的抗流淌性和流平性。随着悬浮剂含量不断增加，涂料的粘度、密度、流平性、悬浮性、涂层厚度及剪切稀释比有不同的变化。     

高压造型用醇基涂料的研究与应用

作者研制了用于高压造型生产铸铁、铸钢件的醇基涂料.该涂料采用石墨粉、铝矾土和锆英粉三种不同耐火填料,三种耐火填料配制的醇基涂料,均能满足涂料各项工艺性能要求,能使铸件表面粗糙度达到GB60601—85:Ra≤12.5μm,铸件表面光洁不粘砂.本涂料采用锂改性膨润土和助剂“D”使醇蒸涂料的悬浮稳定性在8小时内达90%以上,华晋机械制造厂高压造型线采用此种醇基涂料.改善了铸件表面质量消除了铸件粘砂缺陷.     

醇基复合白刚玉涂料粘砂问题的研究

涂料骨料具有较高的烧结强度可有效解决铸件在浇铸过程中的粘砂问题。以白刚玉作为基准骨料,在1 300℃下分别与氧化锌、滑石粉、铝矾土、膨润土、石英粉、二氧化钛、锆英粉、云母等8种辅助骨料进行了单一烧结,烧结强度测试和复合烧结实验。结果表明,白刚玉与锆英粉、二氧化钛、膨润土具有较高的烧结强度。骨料组成为80%白刚玉、20%锆英粉、2%二氧化钛、4%膨润土时涂料的烧结强度最高。按此配方制备的醇基复合白刚玉涂料现场试用涂刷性能好,发气量低,悬浮性好,不易粘砂,与国外知名品牌产品性能相当。     

醇基涂料悬浮性的探讨

介绍了原材料及处理工艺对醇基涂料悬浮性的影响，使用优良有机膨润土作悬浮剂，配以粒度较细但具有适当颗粒级配的耐火粉料，使涂料具有良好的悬浮性和再分散性能。     

大型铸钢件用醇基锆英粉涂料的研制与应用

介绍了大型铸钢件用醇基锆英粉涂料的组成、生产工艺路线及其工艺性能特征,研究了醇基铸造涂料的选材、生产工艺等对涂料性能的影响。该涂料抗粘砂能力强,悬浮性、刷涂性、流平性优异,一次刷涂所得涂层厚度高,适用于各种铸钢件尤其是大型铸钢件的生产,可有效地防止粘砂等缺陷,获得表面质量优良的铸件。     

纳米复合及表面改性铸型醇基粉状涂料的研究

为改善醇基粉状涂料的悬浮稳定性,采用纳米复合和表面改性技术制备了系列醇基粉状涂料。通过扫描电镜考察了粉状涂料的微观形貌,并进行了涂料的实际浇注试验。分析和试验结果表明：研制的醇基粉状涂料无须引发,加醇搅拌后即能制得具有良好悬浮稳定性的浆状涂料;浇注的铸件表面光洁,无粘砂等缺陷。     

Zircon-Based Ceramics Composite Coating for Environmental Barrier Coating

Studies on plasma spraying of zircon (ZrSiO₄) have been carried out by the authors as one of the candidates for an environmental barrier coating (EBC) application, and had reported that substrate temperature is one of the most important factors to obtain crack-free and highly adhesive coating. In this study, several amounts of yttria were added to zircon powder, and the effect of the yttria addition on the structure and properties of the coatings were evaluated to improve the stability of the zircon coating structure at elevated temperature. The coatings obtained were composed of yttria-stabilized zirconia (YSZ), glassy silica, whereas the one prepared from monolithic zircon powder was composed of the metastable high temperature tetragonal phase of zirconia and glassy silica. After the heat treatment over 1200 °C, silica and zirconia formed zircon in all coatings. However, coatings with higher amounts of yttria exhibited lower amounts of zircon. This resulted in the less open porosity of the coating at elevated temperature. These yttria-added coatings also showed good adhesion even after the heat treatment, while monolithic zircon coating pealed off.     

有机膨润土在醇溶剂中的分散悬浮性能研究

采用溶剂油代替二甲苯引发有机膨润土,测试不同配比有机土乙醇悬浮体的黏度和胶体率。试验结果表明,按有机膨润土：120^#溶剂油：乙醇的质量比为1：8：1制成预凝胶,然后将其缓慢分散至乙醇溶剂中,配制成有机土质量分数为2％的乙醇悬浮体,其胶体率能达到82％。采用该分散方法既可充分发挥有机膨润土的分散悬浮性能,又不会对生产环境造成污染。     

Effect of Slurry Composition on Plate Weight in Ceramic Shell Investment Casting

This paper deals with the study of the effect of primary slurry parameters on the plate weight (ceramic retention test) in ceramic shell investment casting process. Four controllable factors of the zircon flour and fused-silica powder based slurries were studied at three levels each by Taguchi’s parametric approach and single-response optimization of plate weight was conducted to identify the main factors controlling its stability. Variations in coating thickness with plate weight were calculated for each slurry and ceramic shell moulds were made on wax plate using primary slurry and coarse fused-silica sand as stucco. The Scanning Electronic Microscopy (SEM) technique has been used to study the surface morphology of zircon flour and fused silca powder particles as well as primary coating (shell surface). X-ray Diffraction (XRD) analysis was done to identify the various phases present in the ceramic slurry coating. Optical profilometer has been used to measure the surface roughness of the shells. The result reveals that the surface condition of shell can be improved by increasing the plate weight, corresponding to higher filler loading in the slurry. Confirmation experiments were conducted at an optimal condition showed that the surface quality of the ceramic shell mould were improved significantly. Castings were produced using Al-7%Si alloy in recommended parameters through ceramic shell investment casting process. Surface roughness of the produced casting were measured and presented in this paper.     

消失模铸造棕刚玉粉-滑石粉水基涂料的研究

选用棕刚玉粉及滑石粉为耐火填料,以硅溶胶及糊精为复合粘结剂,以钠基膨润土和羧甲基纤维素钠(CMC)为复合悬浮剂,通过正交试验方法确定了最佳配方。试验表明,该涂料可用于消失模铸造铜锌合金件、碳钢件,而且成本低廉,实用性强,具有良好的推广价值。     

新型铬铁矿粉铸钢复合涂料的研究与应用

介绍了新型铬铁矿粉水基和醇基铸钢复合涂料的组成结构、生产工艺、性能特点和应用实例.新型铬铁矿粉复合涂料生产成本仅约锆英粉涂料的二分之一,可代替价格昂贵的锆英粉涂料生产无粘砂、气孔等缺陷,表面光洁的合金钢和碳钢铸件.     

球墨铸铁管用消失模涂料的研制

针对球墨铸铁管件的消失模铸造工艺,以铝矾土、石英粉、云母为耐火骨料,膨润土和羧甲基纤维素钠(CMC)为复合悬浮剂,聚乙烯醇(PVA)为粘结剂,进行了耐火涂料的研制。通过涂料的制备和性能检测,并结合生产实际证明,所研制的涂料性能良好,可满足生产要求。     

烧结剥离型醇基浅色铸铁涂料的研究与应用

烧结剥离型醇基浅色铸铁涂料由耐火粉料、剥离助剂、专用复合粘结剂、溶剂和获国家专利的复合分散悬浮剂组成,介绍了其生产工艺、性能特点和应用实例。该涂料的主要性能达到了国内同类产品先进水平。生产实践表明,该涂料烧结剥离性好,生产的铸铁产品表面光洁,无粘砂、气孔等缺陷。