共查询到20条相似文献,搜索用时 31 毫秒
1.
2.
新型铬铁矿粉铸钢复合涂料的研究与应用 总被引:1,自引:0,他引:1
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. 相似文献
3.
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。 相似文献
4.
论文介绍了粘土湿型砂铸造新型醇基喷涂涂料的组成结构、性能特点、应用实例和使用经验.粘土湿型砂铸造新型醇基喷涂涂料的主要性能达到了国内外同类产品领先水平;生产的高锰钢、可锻铸铁和灰口铸铁产品表面光洁,无粘砂、气孔等缺陷. 相似文献
5.
6.
粘土湿型砂用新型醇基喷涂涂料的研究与应用 总被引:2,自引:0,他引:2
介绍了粘土湿型砂铸造新型醇基喷涂涂料的组成结构、生产工艺、性能特点、应用实例和使用经验,重点分析了新型复合分散悬浮剂的主要特点,对比研究了它的悬浮效果,简述了它的作用机理.结果表明:新型醇基复合分散悬浮剂的耐火度高,抗裂性好,悬浮能力与有机膨润土相当;静电分散稳定机理和空间位阻分散稳定机理的共同作用是其分散悬浮效果优良的主要原因.用其生产的高锰钢、可锻铸铁和灰口铸铁产品表面光洁,无粘砂、气孔等缺陷. 相似文献
7.
采用单因素实验方法探讨了电流密度、温度、pH值、搅拌速度对电沉积Cr-Al2O3纳米复合镀的影响;并用L9(34)正交实验方法,确定了主络合剂、辅助络合剂、分散剂、AlCl3.6H2O对纳米复合镀层外观、厚度以及纳米氧化铝含量的影响,确定了最佳镀液配方,并利用扫描电镜、能谱仪和硬度测试仪测试了所得镀层的形貌和性能。结果表明:在最佳工艺条件下,以主络合剂18.9g/L,辅助络合剂3.85g/L,分散剂质量分数2%,结晶氯化铝12g/L所得的镀层厚度可达到13.93μm,纳米氧化铝的质量分数平均可达到10.90%,镀层的显微硬度可达到867.9HV。 相似文献
8.
9.
10.
针对单一络合剂难以兼顾镀液稳定性、镀速和镀层质量等多重要求,现有复合络合剂或成本过高、或工艺稳定性欠佳等问题,采用柠檬酸钠-乳酸-乙酸钠三元复合络合剂,借助增重法、扫描电子显微镜(SEM)、能谱仪(EDS)和材料耐蚀性快速检测专利技术,系统研究了络合剂及还原剂用量、镀液初始pH值及施镀温度对化学镀Ni-P施镀效果的影响,探明镀速、镀层硬度及其P质量分数、镀层腐蚀防护性能随工艺参数的变化规律。结果表明:利用基于三元复合络合剂的镀液,不仅可获得P质量分数最高为18.41%的高磷Ni-P镀层,而且工艺稳定性优异。在适宜的镀液初始pH值区间(4.0~5.5),镀层P质量分数受其它工艺参数的影响甚微,能始终稳定在11.12%~14.52%的高位。典型试样SEM分析表明:镀层表面平整、均匀,结构致密,镀层与基体结合紧密且厚度分布均匀。 相似文献
11.
锂基膨润土在醇基快干锆英粉涂料中的应用试验 总被引:3,自引:0,他引:3
为了提高铸钢件表面光洁度,满足国外客户对毛坯表面的高质量要求,我们分别采用钠基膨润土,钙基膨润土及锂基膨润土作为悬浮剂在醇基快干锆英粉涂料中进行了应用,通过对其悬浮性进行比较性试验,认定锂基膨润土悬浮稳定性最好。本文详细阐述了锂基膨润土的原土的悬浮性,活化处理后的悬浮性及锂基膨润土醇基快干锆英粉涂料的组成,各项性能。并通过生产验证,应用该涂料,铸件表面令人满意。 相似文献
12.
13.
耐油缩孔阴极电泳涂料的研制 总被引:1,自引:1,他引:0
目的 研制耐油缩孔电泳涂料。 方法 制备一种可低温解封的封闭异氰酸酯,将其与常规交联剂复配构架阶梯固化体系,研究不同复配比例对漆膜外观、刀片刃部漆膜厚度、耐油缩孔性能、耐盐雾性能等的影响。 结果 低温交联剂添加量为阳离子树脂总质量的 1 . 0% ~ 1 . 5% 时,阴极电泳漆膜外观良好,耐油缩孔及耐盐雾性能优良。 添加量为 1 . 5% 时,漆膜无油缩孔出现,耐盐雾可达 1032 h 以上,耐锐边腐蚀可达 1 级。 结论 适当添加低温交联剂可显著提高电泳漆膜的耐油缩孔性能。 相似文献
14.
15.
16.
B. Robinson A. Tabecki S. Paul G. Shi A. Mills I. P. Parkin J. A. Darr H. L. de Villiers Lovelock 《Journal of Thermal Spray Technology》2017,26(1-2):161-172
The photocatalytic capabilities of titanium dioxide are widely published. Reported applications of titania coatings include air purification, water purification and self-cleaning. Suspension spray has been highlighted as a possible route for the deposition of highly active nanostructured TiO2 coatings. Published work has demonstrated the capabilities of suspension plasma spray and high-velocity suspension flame spray; however, little work exists for suspension flame spray (SFS). Herein, these three suspension spray processes are compared as regards their capability to produce photocatalytic TiO2 coatings and their potential for industrial scale-up. A range of coatings were produced using each process, manipulating coating parameters in order to vary phase composition and other coating characteristics to modify the activity. The coatings produced varied significantly between the processes with SFS being the most effective technique as regards future scale-up and coating photoactivity. SFS coatings were found to be up to nine times more active than analogous coating produced by CVD. 相似文献
17.
针对浸涂醇基涂料的树脂砂芯进行表面干燥的工艺特点,设计了一种安全型砂芯烘干设备,介绍了这种烘干设备的工作原理和系统结构,采用炉顶排气管路和炉底排气管路相结合的方式,有效排出醇基涂料蒸发出来的水分和乙醇蒸汽,既保证了砂芯的烘干质量,又消除了乙醇蒸汽造成的安全隐患,对砂芯烘干炉技术改造和节能环保有一定的推广价值。 相似文献
18.
Vida Khalili Jafar Khalil-Allafi Hossein Maleki-Ghaleh Alexander Paulsen Jan Frenzel Gunther Eggeler 《Journal of Materials Engineering and Performance》2016,25(2):390-400
In this study, different composite coatings with 20 wt.% silicon and 1 wt.% multi-walled carbon nanotubes of hydroxyapatite were developed on NiTi substrate using a combination of electrophoretic deposition and reactive bonding during the sintering. Silicon was used as reactive bonding agent. During electrophoretic deposition, the constant voltage of 30 V was applied for 60 s. After deposition, samples were dried and then sintered at 850 °C for 1 h in a vacuum furnace. SEM, XRD and EDX were used to characterize the microstructure, phase and elemental identification of coatings, respectively. The SEM images of the coatings reveal a uniform and compact structure for HA–Si and HA–Si–MWCNTs. The presence of silicon as a reactive bonding agent as well as formation of new phases such as SiO2, CaSiO3 and Ca3SiO5 during the sintering process results in compact coatings and consumes produced phases from HA decomposition. Formation of the mentioned phases was confirmed using XRD analysis. The EDX elemental maps show a homogeneous distribution of silicon all over the composite coatings. Also, the bonding strength of HA–Si–MWCNTs coating is found to be 27.47 ± 1 MPa. 相似文献
19.
Nanoparticles and nanostructured films have gained an increasing interest for industrial application in the last years. Based on chemical nanotechnology glass‐like protective coatings thermally processed at comparatively lower temperatures around 500°C were developed for metal substrates by two different ways. Starting from polymeric sols (suspension consisting of branched macromolecules) containing multicomponent oxide of the SiO2‐B2O3‐P2O5‐Na2O system produced by hydrolysis and polycondensation of an alkoxide mixture under acidic condition, thin, hard, transparent, crack‐free and corrosion resistant coatings could be applied to aluminium and steel. Coatings from particulate sols (suspension consisting of solid particles) containing multicomponent oxide synthesized under basic condition by electrophoretic deposition (EPD) proved to be a promising method when very thick coatings are required. Both routes offer the potential of a new type of purely inorganic coatings for corrosion and abrasion protection. 相似文献
20.
以硫酸镍为主盐,次亚磷酸钠为还原剂的镀液体系在AZ31镁合金基体表面化学沉积镍-磷镀层,并通过扫描电子显微镜(SEM)、能谱分析(EDS)、金相分析和极化曲线等分析手段探讨了化学镀液中主盐和还原剂的摩尔浓度比(CNi2+/CH2PO-2)对镁合金表面Ni-P镀层的形貌、成分、沉积速度和耐蚀性能的影响。结果表明:CNi2+/CH2PO-2对Ni-P镀层形貌的影响较小,但与膜层中的镍、磷元素的含量呈明显的线性关系;当CNi2+/CH2PO-2在0.4~0.6之间时,镀层沉积速度最快;CNi2+/CH2PO-2为0.3和0.4时,所得镀层的耐蚀性能较好。综上,在仅考虑主盐和还原剂对镀层性能影响的前提下,CNi2+/CH2PO-2=0.4时所得镀层的综合性能最好。 相似文献