表面硅颗粒整形对高硅铝合金缸套摩擦磨损性能的影响

发布时间：2018-06-29 20:41

本文选题：缸套 + 边角圆化　；参考：《中国表面工程》2016年06期

【摘要】：研究了一种新型的高硅铝合金缸套表面处理技术,采用橡胶圈+金刚石颗粒的方式研磨缸套表面,这种表面硅颗粒整形技术可以使硅颗粒凸出表面并且边角圆化。整形处理缸套表面2 min,可制备出凸出高度约为1.2μm,边角轮廓自然圆化过渡的硅颗粒。摩擦磨损试验结果表明,相对于未整形,整形处理后的高硅铝合金缸套的摩擦因数可从0.14降低到0.12,降幅约为14%;磨损量从0.7 mg降低到0.2 mg,降幅约为71%。未整形的硅颗粒表面覆盖一层铝,或与缸套表面保持同一高度。当活塞环与缸套对磨时,铝作为软金属易发生塑性流变,被碾压覆盖到硅颗粒表面上,发生黏着磨损,所以摩擦因数及磨损量较大。而整形后的硅颗粒凸出缸套表面以承担载荷,加强了表面支承力,而且与铝基体共同形成的凹陷处储油,增大润滑效果,同时其边角圆化,避免了应力集中。所以整形技术可以有效地降低高硅铝合金缸套的摩擦因数及磨损量,改善摩擦磨损性能。
[Abstract]:A new type of high silicon aluminum alloy cylinder liner surface treatment technology is studied. The rubber ring diamond particle is used to grind the cylinder liner surface. This kind of surface silicon particle shaping technology can make the silicon particle protrude out of the surface and round the edge angle. The silicon particles with a protruding height of about 1.2 渭 m and natural circular transition of edge profile can be prepared by shaping the cylinder liner surface for 2 mins. The results of friction and wear test show that the friction coefficient of high silicon aluminum alloy cylinder liner after plastic treatment can be reduced from 0.14 to 0.12, the decrease is about 14%, and the wear amount is reduced from 0.7 mg to 0.2 mg, the decrease is about 71%. The surface of unshaped silicon particles is coated with aluminum or at the same height as the cylinder liner surface. When piston ring and cylinder liner are grinded against each other, the plastic rheology of aluminum is easy to occur as a soft metal, and it is rolled onto the surface of silicon particles, resulting in adhesive wear, so the friction coefficient and wear amount are larger. The shaped silicon particles protrude out of the cylinder liner surface to bear the load, strengthen the surface supporting force, and store oil in the joint depression with aluminum matrix to increase the lubricating effect, at the same time, the edge angle is rounded and the stress concentration is avoided. Therefore, the plastic technology can effectively reduce the friction coefficient and wear quantity of high silicon aluminum alloy cylinder liner, and improve the friction and wear performance.
【作者单位】：大连海事大学船机修造工程交通行业重点实验室;
【基金】：国家重大基础研究发展计划(973计划)(2010) 国家自然科学基金(51509029) 辽宁省教育厅基金(L2015065) 中央高校基本科研业务费专项资金(3132015032)
【分类号】：TG178

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