【作者】 熊博文；

【导师】 吴振卿；

【作者基本信息】 郑州大学 ， 材料加工工程， 2006， 硕士

【摘要】 随着工业自动化程度的提高，对机械零件工作的连续性、安全性要求也提高，而实践证明，导致机械运转失效的主要原因是由于活动构件或者联结件在摩擦力的作用下产生的磨损，磨损导致机械的运转失效，更可能引发安全隐患，这其中磨料磨损占整个磨损总量的50％，故越来越多的研究者对抗磨料磨损的材料进行了一系列的研究。 本文着重论述了俩部分内容：1)研制了一种新型的低应力磨料磨损试验机，主要是对松散磨料磨损提出的，并针对试验机做了磨损试验，取得了满意的效果；2)对双金属复合磨辊的外层金属高铬铸铁进行了磨料磨损研究，高铬铸铁成分为(Wt％)2.2～2.6C，13～15Cr，0.5～1.0Mn，0.4～0.8 Si，0.8～1.0Mo，0.05≥P、S，采用线切割机切割成Φ5×16(mm)的圆柱试样，在不同载荷下对高铬铸铁的抗磨料磨损性能进行了研究，得出了高铬铸铁的理想应用的载荷条件，为双金属复合磨辊的实际应用作指导性作用。 一种新型的低应力磨料磨损试验机的设计是根据低应力磨料磨损原理设计的，低应力磨料磨损是指磨粒的压溃强度超过与工件接触产生的应力，在磨损的过程中磨粒没有压碎，磨料在工件的表面滑动或滚动，由于应力较低，划痕较浅。现有的低应力磨料磨损试验机一般是磨料处于固定或半固定的状态，要不就是对磨料的粒度有很高的要求，本试验机的磨料完全处于松散状态，而且还可以根据实际的工作环境选择需要的磨料和磨料粒度进行模拟，从而更真实的模拟工况条件下的材料磨损情况。此试验机虽然结构简单实用性较强，但仍有不足之处，在磨损试验过程中表现出夹具磨损比较厉害，期待有更好的夹紧转动方式，另外需要加入一些更智能的机构，使其中的一些参数可调节，例如增加一个调速器调节转盘的转速或者能够灵活的改变磨损面与转动方向的夹角等。 对双金属复合磨辊的外层金属高铬铸铁进行不同载荷抗磨料磨损性能研究，也有研究者做过类似的试验，但给出的是少数载荷点，不能说明整个磨损情况。本试验着重提出一系列的载荷对高铬铸铁的磨损情况，得出以下结论：1)高铬铸铁在载荷增加到45N左右时，材料的耐磨性急剧降低，碳化物开始脱落，随着载荷的进一步增大，碳化物的脱落加剧。这是因为载荷的增加作用在碳化物单更多还原

【Abstract】 With the automatization of degree have improved in the industry, the demand of the mechanism continuity and security also have increased, the reason that cause the operation of mechanism to invalidation is the wear by the friction, which abrade the movement component and joint component. The wear not only case the operations to failure, but also bring on safe hidden trouble , the quantity of grinding abrasion is the half of the total of the wear, so more and more the researchers is go on a series of the investigations on the wearable materials.The paper emphasize on discussing two parts content: 1) In order to apply on the relax grain, we have developed a new low stress grinding abrasive tester and experiment on it, we have attained satisfying purpose; 2) we experiment on the high chromium cast iron of the binary-metal composite grinding roll , the element of the high chromium white cast iron (Wt%) is 2.2 ~ 2.6 C, 13-15 Cr, 0.5 ~ 1.0 Mn, 0.4 ~ 0.8 Si, 0.8 ~ 1.0 Mo, 0.05≥ P、S, it was incised toΦ5×16 (mm) columnar sample, The high chromium white cast iron under different loads was carried on grinding abrasion test on the testing machine , and we have attained the ideal applied load of the high chromium white cast iron , which have the guidance of the application of the high chromium white cast iron in fact.The design of the new low stress grinding abrasive tester is base on the principle of the low grinding abrasion, the low stress grinding abrasive is the stress cause by the components under the burst intensity of the grain, during the wearing, the grain can’t burst, the grain was glided or rolled on the surface of the workpieces, because of the low stress, the nick was fleet. To this day, the mostly grain is immobility or half-immobility on the low stress grinding abrasive tester, and the demand of the granularity of the grain is very high, the new low stress grinding abrasive tester keep the grain on relax state, in order to attain the true grinding abrasion data, we can vary the grain and the granularity carry on simulation with the work condition. The machine is simple and also availability, but still have some deficiency, we found that更多还原