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ESR 1.2343模具钢夹杂物成分及形成原因分析
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作者 付韶华 赵庆晨 +1 位作者 卢伟锋 杨永芳 《模具工业》 2023年第1期63-68,共6页
由于某ESR 1.2343注塑模具钢存在麻点,导致家电产品出现外观质量问题,为探寻麻点产生原因对该模具钢的表面进行了表征分析。通过SEM对夹杂物的形貌进行了表征,在EDS模式下对基材及夹杂物成分进行分析。结果表明,钢体表面存在较粗的夹杂... 由于某ESR 1.2343注塑模具钢存在麻点,导致家电产品出现外观质量问题,为探寻麻点产生原因对该模具钢的表面进行了表征分析。通过SEM对夹杂物的形貌进行了表征,在EDS模式下对基材及夹杂物成分进行分析。结果表明,钢体表面存在较粗的夹杂物,其尺寸在10~30μm,且分布较密,根据GB∕T 10561-2005国标归类为粗系D类2.5级环状氧化物,是由Ca包裹在内的MgO-Al_(2)O_(3)尖晶石构成的近球形析出物,其在电渣重熔生产的钙处理精炼过程中产生,同时由于其表面电位低,在硫和氯腐蚀环境下会引起点蚀,为保障塑件成型质量及生产效率,从企业及用户的角度分别提出了解决方案。 展开更多
关键词 注射模具钢 电渣重熔 非金属夹杂物 微观表征 元素分析 扫描电子显微镜
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DMC/MVQ绝缘复合材料的制备及性能表征
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作者 武卫莉 李德生 《弹性体》 CAS 2013年第3期48-52,共5页
针对硅橡胶力学性能差的特点,本工作以硅橡胶(MVQ)为基相,以团状模塑料(DMC)为增强相,以丁苯橡胶(SBR)为相容剂来制备DMC/MVQ绝缘复合材料,研究了SBR的用量对MVQ性能的影响。结果表明:SBR和MVQ共混制得的并用胶性能要比纯MVQ的性能好,... 针对硅橡胶力学性能差的特点,本工作以硅橡胶(MVQ)为基相,以团状模塑料(DMC)为增强相,以丁苯橡胶(SBR)为相容剂来制备DMC/MVQ绝缘复合材料,研究了SBR的用量对MVQ性能的影响。结果表明:SBR和MVQ共混制得的并用胶性能要比纯MVQ的性能好,其最佳配比为DMC 60phr,SBR 25phr,MVQ 75phr;制备的复合材料体积电阻率都在4.9×1012Ω.m以上,复合材料的绝缘性能良好;通过扫描电镜分析(SEM)和动态热机械分析(DMA),研究了复合材料的相容性,SBR的加入改善了DMC/MVQ绝缘复合材料的相容性,增加了界面相互作用,提高了DMC/MVQ绝缘复合材料的性能。 展开更多
关键词 甲基乙烯基硅橡胶(MVQ) 团状模塑料(DMC) 绝缘复合材料 制备 性能表征
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Utilisation of Indigenous Ceramic Raw Materials for the Production of Water Closet
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作者 Z. U. Elakhame Y. J. Obe +7 位作者 Y. L. Shuaib-Babata L. K. Bankole O. J. Omowunmi I. O. Ambali O. O. Akinsanya A. J. Unachukwu R. G. Adeyemo M. Ikusedun 《Journal of Minerals and Materials Characterization and Engineering》 2020年第5期364-376,共13页
The fact is that Nigeria ceramic raw materials are underutilized as a result of inadequate information on the materials which limits the local production of water closet. The emphasis of this research was on the suita... The fact is that Nigeria ceramic raw materials are underutilized as a result of inadequate information on the materials which limits the local production of water closet. The emphasis of this research was on the suitability of the physio-chemical properties of the abundant locally sourced ceramic raw materials from South-west Nigeria. The selected locally sourced raw materials included: kaolin, feldspar, silica and ball clay. The Physical properties carried out on the specimens produced include chemical analysis, shrinkage, porosity, bulk density, modulus of rupture, plasticity and viscosity. The physical property tests were done in accordance with (ASTM C). Standard and the chemical composition were identified by AAS spectrometer. However, the ratio of kaolin, feldspar, quartz and ball clay was varied in five major formulation represented as A, B, C, D and E. The clay, kaolin, quartz and feldspar used in this study were found to belong to alumina-silicate group suitable for the production of standard water closet. The samples’ properties met the required standards;hence, the materials were found suitable for production of water closet of acceptable standards. Composition A specimen gives the most suitable proportions for the production of water closet at 40% of kaolin, 25% of feldspar, 10% of quartz and 25% of ball clay respectively. 展开更多
关键词 Ceramics Materials characterization mould Slip-Cast Water-Closet
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