汽车电磁继电器触点失效的案例分析

本文针对某款整车电压12V轻型商用车开发过程中发生的汽车电磁继电器触点变形失效故障,结合原理与使用工况,分析故障原因,提出解决方案并验证,为后续继电器选型补充不同场景使用的要求与注意事项。

关于铆模型腔与触点头部尺寸匹配关系的研究

通过分析铆接后触点头部产生银铜结合处边缘裂纹、银开裂、工作面压印及触点与簧片之间有缝隙或变形等质量问题,阐述铆模型腔与触点的匹配性对铆接质量的影响,同时阐明了铆模对铆接质量的重要性,供各电器厂家的生产及技术人员参考。

Evaluation of pitting corrosion of thixoformed A356 alloy using a simulation model

Pitting behavior of thixoformed A356 alloy, with different reheating temperatures, was evaluated. Linear sweep voltammetric tests were used to study the pitting behavior of thixoformed, rheocast and gravity-cast A356 alloy in a 3.5% NaCl solution. A simulation method was also used in order to identify local galvanic corrosion current density between local galvanic couples. The results obtained show that the resistance to pitting corrosion of the thixoformed samples formed at 600 ℃ is higher than that of the samples formed at 610 ℃ as well as rheocast and gravity-cast samples. These results could be explained by morphological aspects of silicon phase as well as the area effect as related to galvanic corrosion between silicon particles and eutectic aluminum phase.