摘要
在工程应用的许多场合中，往往同时存在着磨粒分别在表面滚动与滑动造成的两种磨损形式；因此，滑动磨粒磨损也是一种常见现象，但目前所悉对其研究的文献报道却还甚少。通过往复式滑动磨损试验机对几种不同硬度材料与ＳｉＣ磨粒配磨时的滑动磨粒磨损研究发现，在给定的试验条件下，材料的表面硬度是影响耐磨性的主要因素。当材料的表面硬度高于７３４ＨＶ时，其耐磨性对硬度变化的敏感性很大。例如，当硬度从７３４ＨＶ仅增加到８３０ＨＶ时，材料的耐磨性就可以提高近一倍，但磨报表面粗糙度却略有增大。此时的磨损机制为微切削．在材料的表面硬度低于７３４ＨＶ时，硬度对材料耐磨性的影响较小，如在硬度从３１７ＨＶ增大到７３４ＨＶ的情况下，耐磨性仅能提高约５０％，但磨损表面粗糙度的降低很快，此时的磨损机制以微切削为主，还伴随有应变疲劳剥层。因此，在许多工程应用中，追求材料表面的高硬度是获得理想使用寿命的关键。
In a numerous cases of industrial application there exist usually two kinds of abrasivewear produced by rolling and sliding of abrasive particles at the same time. Therefore,the slidingabrasive wear is a common phenomenon as well,which was still less reported in literatures.Through the studies of sliding abrasive wear for the steels of different hardness matching with SiCabrasive particles on a reciprocating wear testing machine it was found that the surface hardness ofsteels is the main influencing factor of their wear-resistance. When the hardness is higher than 734HV,the wear resistance is very sensitive to the hardness.For instance,when the hardness isincreased from 7 34 HV to 830 HV,the wear-resistance can be improved about 1 00%,although theroughness of wear surface shows a little increasement,the wear mechanism is micro-cutting at thistime.When the hardness is lower than 734HV,it is less sensitive to the wear-resistance.Forinstance,when the hardness is increased from 317 HV to 734 HV,the wear-resistance is improvedonly 50%,but the roughness of wear surface decreases rapidly. In this case,the wear mechanismis micro-cutting dominantly accompanying with delamination induced by strain fatigue. Therefore,the higher surface hardness of steels is the key point for getting an ideal life-time in many industrialapplications.
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
1994年第3期213-219,共7页
Tribology
