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电冶熔铸WC/GCr15钢复合材料的摩擦磨损特性 总被引:4,自引:1,他引:4
选择大颗粒WC作增强相,采用电冶熔铸工艺制备了含27%WC粒子的WC/GCr15钢复合材料,观察了复合材料中WC颗粒与钢基体的结合情况;在MM-200型摩擦磨损试验机上研究了室温下复合材料同GCr15钢对摩时的摩擦磨损性能。结果表明:复合材料中的WC颗粒部分溶解于钢基体相,两相界面形成厚达数微米的反应层,有效地提高了界面结合强度。电冶熔铸WC/钢复合材料的耐磨性能比基体材料GCr15钢提高了5倍以上,扫描电镜下的磨痕照片显示:大颗粒WC承担了磨损的主要载荷,实验中没有发生明显脱落的现象,说明界面结合强度在提高复合材料磨损性能方面所起的作用。 相似文献
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WC(27%) reinforced steel matrix composites were produced by using an electroslag melting casting technique. The microstructure of the material was characterized using scanning electron microscopy(SEM), optical microscopy and X-ray diffraction (XRD). Energy dispersive spectroscopy(EDS) and transmission electron microscopy were performed to investigate the interracial composition between WC particle and steel matrix. The results reveal that the WC particles are partially melted into the steel substrate. At the same time, a reaction layer was detected along with the periphery of WC particle, which significantly enhances the bonding strength of the interface. A slipping wear (high stress abrasion) test was utilized to understand the wear behavior of this material. Abrasive experiment displays a better wear resistance than unreinforced steel matrix when coarse WC particles are dispersed into it. The coarse particles provide greater wear-resistance than the fine particles and operatively takes on the most applied loads. Additionally, the large particles have not been peeled during the wear process for a long time, which indicates the effect of interfacial reaction on wear behavior at the ambient temperature. A double carbide (Fe, W)3C is detected in the interface zone between particles and matrices using transmission electron microscopy. 相似文献
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工程车辆座椅减振环节模型探讨 总被引:2,自引:0,他引:2
黄曼平 《安徽建筑工业学院学报》1998,(4)
分析和讨论了几种不同结构的座椅减振模型,并用某工程车辆的基本数据进行座椅的结构参数优化计算。结果表明,这几种结构模型均取得了较好的减振效果,即良好的乘坐舒适性,为工程车辆驾驶座椅的设计提供了有益的参考。 相似文献
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文章介绍了两种装甲战斗车辆行驶试验中有关人机工程的测试和评价情况,并对测试、评价结果进行了分析。由于其人机工程主、客观评价存在不一致的情况,文章对此作了重点的深入分析。结果表明,客观评价反映了车辆的性能;而主观评价则是把人-车辆-环境作为一个系统来分析,尽管被测试者之间存在个体差异,但包含的因素比较全面,因而更可信。文章最后建议装甲车辆应对人-车辆-环境系统进行分析、评价,以及加强对作战人员环境适应性的研究和训练。 相似文献
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