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本文在试验基础上比较了几种拖拉机铸造履带板材料的磨料磨损特性,对几种拖拉机履带板材料进行实验室和田间磨损试验的结果表明:含碳量较高(约0.35％)及含硫量较低(约0.02％)的31Mn2Si铸钢的耐磨性较好,增加淬火及回火温度对耐磨性不利。Mn7也是一种合适的履带板材料且特别适用于在水田中工作。这两种材料都可考虑作为常用的高锰钢履带板的代用材料。 田间试验表明:拖拉机工作的土壤类型和条件不同,履带板会在不同部位“优先磨损”。微观分析指出:履带板表面的磨损是多种类型磨损机理的综合结果。在水田中使用的履带板磨损表面除了经受磨料颗粒压入并磨损以外还要经受腐蚀的作用。这种腐蚀明显地加速了磨损过程。
In this paper, the abrasive wear characteristics of several tractor cast track shoes were compared on the basis of experiments. The laboratory and field wear tests on several tractor track shoes showed that the carbon content is high (about 0.35%) and the sulfur content 31Mn2Si castings with lower amounts (about 0.02%) have better wear resistance, and increased quenching and tempering temperatures are not good for wear resistance. Mn7 is also a suitable track shoe material and is particularly suitable for use in paddy fields. Both of these materials can be considered as a substitute for commonly used high manganese steel track shoes. Field tests show that: tractor soil types and conditions of work, different parts of the track shoes will be “preferential wear.” Microanalysis indicates that the wear on the track shoe surface is a composite result of many types of wear mechanisms. The track wear surface used in paddy fields is subject to corrosion in addition to being pressed and worn by abrasive particles. This corrosion significantly accelerates the wear process.