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用于发动机的气门座圈是用于和气门相配合,使燃烧室保持气密性的一个零件。对气门座圈要求的性能是,耐磨性高与对气门的侵蚀性小。通常,对汽油发动机进气气门座圈材料,最优先考虑的是成本。可是,最近为应对发动机输出功率较高和类似工况,现在进气气门座圈也需要高耐磨性。一直在强烈要求开发一种既能满足这些要求又使成本增高最少的新材料。作为这项研究成果开发的材料,当用于汽油发动机进气气门座圈时,耐磨性与切削性高,而和通常使用的为改善切削性经含浸树脂处理的材料相比,由于省掉了含浸树脂处理,从而减低了成本。在这篇报告中阐述了新材料的开发与特性。添加的硬质颗粒的类型与数量都强烈影响气门座圈(VSI)的耐磨性。在这项研究中,通过添加5%(质量分数)Fe-Mo-Si合金作为硬质颗粒制造的材料,其耐磨性优于常规材料。不进行含浸树脂处理,采用析出MnS法得到令人满意的切削性。新开发的气门座圈(VSI)材料达到了耐磨性、切削性及成本的开发目标。从2005年10月,新开发的气门座圈材料开始进行批量生产。
The valve seat for the engine is a part that is used with the valve to keep the combustion chamber hermetically sealed. Required performance of the valve seat is that high wear resistance and erosion of the valve small. Often, the highest priority is on the cost of gasoline engine intake valve seat materials. However, in response to the recent high engine output and similar conditions, intake valve races now also require high wear resistance. There has been a strong demand for the development of new materials that meet these requirements with minimal cost increases. The material developed as a result of this research shows high abrasion resistance and machinability when used in a gas engine intake valve seat, and as compared with commonly used materials for improving machinability that have been treated with an impregnated resin, Impregnated resin treatment, thus reducing costs. The report describes the development and characteristics of new materials. The type and amount of hard particles added strongly influence the wear resistance of the valve seat ring (VSI). In this study, wear resistance was better than conventional materials by adding 5% (mass fraction) Fe-Mo-Si alloy as a hard particle. Impregnated resin treatment is not performed, and precipitation of MnS is obtained satisfactorily. The newly developed valve seat (VSI) material achieves the development goals of abrasion resistance, machinability and cost. From October 2005, the newly developed valve seat material began mass production.