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利用销盘高速干滑动摩擦磨损试验机,对30Cr Mn Si Ni2A低合金超高强度钢的摩擦磨损性能进行了研究,应用JSM-6390A型扫描电子显微镜和X-衍射方法对摩擦磨损表面进行观察,表征其摩擦表面的微观形貌、摩擦磨损产生的磨屑以及由于摩擦产热而引起的氧化物,进而推断出磨损机制.结果表明:摩擦系数随速度和载荷的增大而减少,其速度是影响摩擦系数的主要因素;在摩擦初期当摩擦系数快速下降时,摩擦表面温度急剧增加,当达到一定数值后二者都形成一个动态的平衡;随着速度和载荷增大,磨损机理主要由氧化磨损转变为剥落、塑性变形、犁沟以及黏着磨损,且磨损表层的氧化物由Fe O转变为Fe_3O_4和Fe_2O_3,当出现Fe_2O_3氧化物时,磨损率急剧升高.
The friction and wear properties of 30Cr Mn Si Ni2A low-alloy and ultra-high strength steel were studied by using pin-plate high-speed dry sliding friction and wear tester. The surface of friction and wear was observed by JSM-6390A scanning electron microscope and X-ray diffraction. The results showed that the friction coefficient decreased with the increase of velocity and load, and the velocity of friction was The main factors that affect the friction coefficient; when the friction coefficient decreases rapidly in the initial stage of friction, the friction surface temperature increases sharply, and when both reaches a certain value, both of them form a dynamic balance; as the speed and load increase, the wear mechanism mainly consists of oxidation The wear changes into exfoliation, plastic deformation, furrow and adhesive wear, and the wear surface oxide grows from FeO to Fe_3O_4 and Fe_2O_3. When Fe_2O_3 oxide appears, the wear rate increases sharply.