NY-05变性淀粉在苎麻织物上浆中的应用

探讨应用NY-05变性淀粉对苎麻织物的上浆工艺,苎麻纱毛羽长,纱线脆硬,浆纱中贴伏毛羽、保持纱线伸长是关键.采用以NY-05变性淀粉62.5 kg、PVA18.5 kg、柔软剂2 kg的配方对苎麻27.8/27.8 205/228品种进行上浆,提高了浆膜的弹性和耐磨性,浆纱毛羽明显减少,织机效率显著提高,用浆成本降低,经济效益显著.     

石灰石-石膏湿法脱硫装置常见故障分析及处理

在石灰石-石膏湿法脱硫工艺中,设备经常发生磨损、结垢堵塞、腐蚀等缺陷,严重时会影响到脱硫设施的投入率.根据生产实际对容易发生的缺陷原因进行分析,提出解决方案和对策措施,并在原有设备的基础上提出改进建议,提高设备的可靠性.     

TiC铸铁材料在船舶柴油机气缸套中的应用

本文采用原位合成的方法,在熔体中加入钛铁与铸铁中的碳合成TiC强化铸铁材料,制备出了TiC质量比分别为0.5%、1.0%、1.5%和2.0%的TiC强化铸铁材料,并考察了强化铸铁的组织、力学性能和耐磨损性能。结果表明,金相均显示出基体中合成了呈小块状多边形的TiC颗粒。原位合成TiC颗粒增强后的铸铁材料,其力学性能较基体都有不同程度的提高。并且随着TiC加入量的增强,其硬度、抗拉强度和磨损性能都显著提高。在此基础上,对TiC颗粒强化铸铁材料的力学性能及摩擦磨损性能的影响机理进行适当分析和讨论。     

基于单片机测试系统对凿削磨损的动态测量和分析

介绍了单颗粒凿削磨损测试系统的原理、结构、测试方法以及在镁合金表面电弧喷涂锌铝合金的表面质量的检测中的应用.试验通过对试样划痕形貌尺寸数据的测量和对单片机力学信号的采集来进行计算,从而来绘制多条比能耗对应磨损体积的关系曲线,从对凿削磨损的开始到结束的整个磨损过程的动态分析,为磨损机理研究提供更多的细节,通过测试数据的处理,继而确定获得具有最佳耐磨性能的喷涂工艺参数.     

多元复合离子渗盐浴技术在液压支架维修中的应用

多元复合离子渗盐浴处理是在LTC防腐技术基础上研发的一种新的金属表面强化改性技术。将工件在两种不同性质的熔融盐液中先后进行处理,使多种元素同时渗入金属表面,形成由几种化合物组成的复合渗层,使金属表面得到强化改性,耐磨性、抗蚀性和耐疲劳性同时得到较大提高,本技术还具有节能、变形量小等优点。在液压支架维修中,利用此技术来强化改性千斤顶缸体内表面的耐磨性、抗蚀性,达到提升千斤顶的使用寿命,进而提升液压支架维修使用寿命。     

不锈钢表面SiO2-ZrO2-Al2O3-Cr2O3陶瓷涂层性能的研究

将氧氯化锆、正硅酸乙脂、无水乙醇3种物质按物质的量比135放进烧杯搅拌均匀后,再放进微波炉加热10s取出,得到SiO2-ZrO2溶胶。然后,将100mL氨水、50mL硝酸铝溶液和50mL硝酸铬溶液混合均匀后,放进微波炉加热1min后取出,即制得Al2O3-Cr2O3溶胶。取SiO2-ZrO2溶胶和Al2O3-Cr2O3溶胶按n(SiO2)n(ZrO2)n(Al2O3)n(Cr2O3)=6211混合,搅拌2h,得到SiO2-ZrO2-Al2O3-Cr2O3复合溶胶。将打磨、除锈、除油处理后的不锈钢基体浸入SiO2-ZrO2-Al2O3-Cr2O3溶胶一定时间后,以浸渍提拉法得到均匀的溶胶涂层,真空干燥48h,经700℃热处理1h后便可得到SiO2-ZrO2-Al2O3-Cr2O3复合陶瓷涂层。采用XRD、IR和SEM对不同条件热处理的复合陶瓷涂层的物相组成、表面形貌进行分析,并对复合陶瓷涂层的性能进行了研究。结果表明(1)SiO2-ZrO2-Al2O3-Cr2O3复合溶胶热处理后为非晶态材料,且在凝胶中形成了三维的硅氧四面体网络骨架;(2)涂层试样不出现龟裂或脱落的循环次数(900℃,空冷)在15~30次范围内,涂层的抗热震性较好;(3)在700℃热处理1h条件下,涂层单位面积的质量损失最小,具有较好的抗腐蚀性;(4)有涂层试样较无涂层试样的氧化速率低,且以3次涂膜的氧化速率最低;涂层由粒径为2~3μm左右的微粒组成,涂层较致密,抗氧化性较好;(5)有涂层试样的耐磨性均优于无涂层试样,有涂层试样的以3次涂膜的耐磨性最好。     

EVA鞋底发泡材料的耐磨和止滑性能研究

通过改变乙烯醋酸乙烯共聚物(EVA)鞋底发泡材料中的过氧化二异丙苯(DCP)和偶氮二甲酰胺(AC)含量,在配方中加入碳酸钙和采用三元乙丙橡胶(EPDM)部分替代EVA三种方法,分析材料干湿止滑和磨耗性能.发现适当的发泡剂用量下,增加交联剂,材料的耐磨性上升,干湿止滑性能不变,但交联剂超过交联密度临界值后,干湿止滑性能下...     

Effect of high volume tile ceramic wastes on resistance of geopolymer mortars to abrasion and freezing-thawing cycles: Experimental and deep learning modelling

Utilizing industrial and agriculture waste materials to produce a green and sustainable mortar have widely investigated and assessed based on the mechanical and durability properties. Herein, the abrasion and freezing-thawing resistance of fly ash (FA)-ground blast furnace slag (GBFS) based geopolymer mortars incorporating high content of tile ceramic wastes (TCWs) have been evaluated experimentally and mathematically using artificial neural network (ANN). A relatively dilute (4 M) alkaline solution was used to activate the ternary blend. The TCWs was maintained as a relatively large percentage of the total binder, i.e. 50%, 60% and 70%. Once the casting process was complete, curing of the samples was performed at 27 °C. These then underwent testing at day 1, day 3, day 7 and day 28 to provide durability data for various specimen ages. Tests encompassed exposure to abrasion, ability to withstand cyclic freeze-thawing and wet-drying, and permeability to water. Investigations to establish the impact of the high TCWs proportion on the generation of sodium aluminium, calcium aluminium and calcium silicate hydrate (N, C-A-S-H) gels, respectively, included X-ray diffraction, scanning electron microscopy and Fourier-transform infrared spectroscopy. The large percentage of TCWs (70%) generated GPMs that had a minimal effect on the environment and which, by day 28, evidenced a compressive strength above 35 MPa. Augmenting the GBFS and FA content promoted the capacity to withstand freeze-thawing cycles and enhanced durability. Improved performance was also observed in scenarios associated with abrasion resistance. In addition, the proposed models proved their accuracy in which MSE, MAPE, SI were less than 1.93, while R2 of greater than 0.9 confirmed the closeness between predicted and actual results. Substitution of TCWs and FA for GBFS additionally reduced landfill problems of ceramic wastes and achieved the sustainability aims.     

濮城油田井下管杆偏磨原因分析及对策

分析了濮城油田抽油井井下油管与抽油杆偏磨原因,提出了相应的治理措施。现场应用结果,有效地延长了抽油井的检泵周期。