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左西南 《中国新技术新产品》2009,(24):149-149
轴承在各种场合得到广泛的应用,而作为一种精密的机械产品,一旦锈蚀,会对其使用带来不良的影响。因此必须要高度重视轴承的防锈工作。轴承的防锈包括工序间的防锈和成品的防锈两个方面。一般对成品的防锈比较重视,防锈效果也较好。而工序间的防锈由于观念和成本等方面的原因,不太被重视。因此采用简单方便,高效低成本的防锈方法就显得尤为重要。 相似文献
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铸件毛坯工序间防锈采用传统的浸(喷)涂法有许多缺点,如:和漆附着力差、污染切削液和零件清洁度下降等。为此,作者研制了水基防锈剂,克服了上述缺点。实践证明,这种防锈剂经济效益也十分显著。 相似文献
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由于本厂产品生产过程的特殊性 ,磷化及未磷化的工件需要经过近 1个月后才能进行涂装 ,因此钢铁件工序间的防锈显得尤其重要。基于以往这方面工作的欠缺 ,本文作者通过试验 ,对两种防锈药品进行性能评定 ,并选出更为适合我厂生产需要的SF 90 0型防锈产品。通过对该产品的应用 ,使我厂钢铁工序间防锈的工作更加完善 ,消除了人工擦除锈迹不彻底而带来的涂装质量隐患 ,产品的表面处理质量得到了明显的提高。1 试验方法本试验采用 70℃腐蚀失重试验法 ,方法为 :将B3F钢试片用砂布磨光 ,依次用汽油→汽油→乙醇→乙醇洗净后吹干 ,用分析天平… 相似文献
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为了解决某些特殊场合,如地下管道、国防坑道中的管线、电缆等的防锈问题,在研制油溶性气相缓蚀剂的基础上,以含不饱和键的丁基橡胶、多聚萜烯树脂、增塑剂、无机充填剂和稳定剂为粘结剂的基础配方,开发成功了多金属通用气相防锈胶带。同时采用盐雾箱加速试验和自然环境试验对其防锈效果进行了研究,结果显示,该气相防锈胶带对多种金属材料和合金具有优异的防锈效果。它不仅可以有效解决各种地下管道的防锈问题,还可以广泛用于各种不适宜涂油或包装的各种金属平面的防锈。 相似文献
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碳钢材质汽车零部件产品在生产的全过程中,仓储周转是必不可少的环节.为了避免锈蚀发生,同时兼顾经济性,仓储周转期间的产品防锈方案必须和生产计划紧密结合,在满足生产的前提下达到防锈方案的优化.根据不同存储周期的要求,通过试验选择合理的防锈材料,为有效解决零件的锈蚀问题提供适用、经济的防锈方案.采用水基防锈剂、水基防锈剂与气相防锈纸(复膜)配合、碳氢防锈剂与塑料袋配合3种防锈方案,分别可实现零部件仓储周转期间1个月、6个月及12个月存储期的防锈. 相似文献
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铸铁水基防锈剂的研究 总被引:1,自引:0,他引:1
通过正交试验,从一组水溶性高分子成膜剂中选出了较理想的聚丙烯酸酯作为水基防锈剂的成膜剂。含5%聚丙烯酸酯的有机水基防锈剂CM-1对铸铁的室内防锈达3个月以上。 相似文献
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在分析化学成分对铸态球墨铸铁影响的基础上,通过采用低稀土球化剂、使用盖包法球化处理以及复合孕育工艺等一系列措施,成功实现了完全铸态条件下球墨铸铁件的生产。该方法无需对铸件进行热处理,提高了生产效率,降低了铸件生产成本,改善了生产环境。 相似文献
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目的 以铸造表面存在黑色斑点的某ZTA15钛合金零件为研究对象,研究零件铸造表面外来物质的成分、结合方式及其形成原因。方法 利用扫描电子显微镜对零件铸造表面及截面形貌进行观察,利用能谱分析仪对零件铸造表面及截面成分进行分析。结果 零件铸造表面主要存在棕刚玉颗粒和碳黑颗粒两种外来物质,棕刚玉颗粒嵌入铸件基体,碳黑颗粒附着于铸造表面。结论 零件铸造表面黑色斑点是碳黑颗粒显示,附着于铸造表面的碳黑颗粒对零件表面质量及镀层质量有影响,碳黑颗粒产生于零件表面油污清洗不洁净真空热处理后析出,热处理前采用超声波清洗+冷水洗+热水洗+吹干的方法清洁零件,可改善零件热处理后的表面质量。 相似文献
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The thermal shock resistance test was conducted for grey cast iron and a compacted cast iron for use in casting environment. The test consisted of a specimen partially immersed in a molten salt bath of 55% Na2C03 and 45% CaC03 at 1000 ° C for 4.5 min, followed by plunging into water. The test results from laboratory and field indicated that the grey cast iron is superior to the compacted cast iron. In the laboratory test, the thermal shock resistance of the cast iron can be judged from the summation of crack length and crack patterns in the specimen after a certain number of thermal shock cycles. The inferior thermal shock resistance of the compacted cast iron is mainly attributed to the more extensive martensite formation after the thermal shock cycling compared with the grey cast iron. 相似文献
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Preparation of Superhydrophilic and Underwater Superoleophobic Nanofiber‐Based Meshes from Waste Glass for Multifunctional Oil/Water Separation
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Qinglang Ma Hongfei Cheng Yifu Yu Ying Huang Qipeng Lu Shikui Han Junze Chen Rong Wang Anthony G. Fane Hua Zhang 《Small (Weinheim an der Bergstrasse, Germany)》2017,13(19)
The deterioration of water resources due to oil pollution, arising from oil spills, industrial oily wastewater discharge, etc., urgently requires the development of novel functional materials for highly efficient water remediation. Recently, superhydrophilic and underwater superoleophobic materials have drawn significant attention due to their low oil adhesion and selective oil/water separation. However, it is still a challenge to prepare low‐cost, environmentally friendly, and multifunctional materials with superhydrophilicity and underwater superoleophobicity, which can be stably used for oil/water separation under harsh working conditions. Here, the preparation of nanofiber‐based meshes derived from waste glass through a green and sustainable route is demonstrated. The resulting meshes exhibit excellent performance in the selective separation of a wide range of oil/water mixtures. Importantly, these meshes can also maintain the superwetting property and high oil/water separation efficiency under various harsh conditions. Furthermore, the as‐prepared mesh can remove water‐soluble contaminants simultaneously during the oil/water separation process, leading to multifunctional water purification. The low‐cost and environmentally friendly fabrication, harsh‐environment resistance, and multifunctional characteristics make these nanofiber‐based meshes promising toward oil/water separation under practical conditions. 相似文献
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Cast iron has become a popular cast metal material which is widely used in modern industry and today's technology because of its low cost and desirable properties such as good castability, convenient machining properties, better wear resistance, etc. This paper is concerned with the variation of mechanical properties depending on section thickness of nodular cast iron. Firstly manufacturing process of GGG40 (EN‐GJS‐400‐15/DIN 1693 or 60‐40‐18/ASTM A536) nodular (ductile) cast iron was performed. Sand mould casting was only used as a molding process. Following, convenient moulds were prepared and the casting process was carried out in moulds that have different diameters (≤30 mm) to examine the cooling rate effects to the mechanical properties. Finally, tensile, hardness, metallography and fatigue tests were applied to cast materials test specimens. The results show that the cooling rate which is related to the section thickness affects the mechanical properties clearly. 相似文献
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利用双液铸造液膜连接工艺制备大平面的低碳钢/高铬铸铁耐磨板。采用SEM,EDS对复合层进行组织观察及成分分析。结果表明:不同厚度的复合板从低碳钢侧至高铬铸铁侧可以分为低碳钢→珠光体过渡层→复合层→高铬铸铁过渡层,双金属复合层完全实现了冶金结合。通过对复合层区域进行显微硬度分析,从低碳钢至高铬铸铁侧的显微硬度在345~1260HV范围梯度分布。复合层的显微组织主要为γ-Fe+粒状碳化物。高铬铸铁过渡层奥氏体组织呈现垂直复合层方向的树枝状生长,并随着耐磨板厚度的增加,奥氏体生长的方向性逐渐消失。根据低碳钢的温度变化初步建立了相关的温度场数学模型。 相似文献