表面技术2017，Vol.46Issue(6)：215-220,6.DOI:10.16490/j.cnki.issn.1001-3660.2017.06.034
泥浆泵高铬铸铁材料激光淬火技术及其摩擦磨损性能研究
Laser Quenching Technology and Friction & Wear Properties of Mud Pump High Chromium Iron Material
摘要
Abstract
The work aims to improve abrasion resistance of high chromium iron. CO2 laser was applied to surface la-ser-quenchingof high chromium iron sample. Under the condition of abrasive medium, tribological properties of sample subject to laser quenching were studied on MMW-1A-type tester. Surface friction coefficient and wear rate of the sample were meas-ured and analyzed. Surface micro-structure of the samplewas refined by laser quenching, which could be divided into three zones from the surface to the center, namely, quenched zone, heat affected transitionzone and substrate zone. Compared with the substrate, hardness of the quenched layer was enhanced greatly. The maximum hardness up to 1105.7HV was present on the subsurface. When the friction-wear test reached a steady state, friction coefficient of the quenched sample surface was lower than that of the unquenched one. The friction coefficient was about 0.3 (the minimum)at the quenching zoneintervalof 1 mm while that of the unquenched onewas up to 0.65. Provided with the same wear duration, wear rate of the laser quenched sample was lower than that of the unquenched one. Minimum friction coefficient and optimum abrasion resistance were obtained at the quenching zone interval of 1 mm. The laser quenching technology can effectively improve abrasion resistance of high chromium cast iron, and prolong service life of mud pump cylinder.关键词
泥浆泵缸套/高铬铸铁/激光淬火/淬硬层/摩擦磨损Key words
mud pump cylinder/high chromium cast iron/laser quenching/hardened layer/friction and wear分类
矿业与冶金引用本文复制引用
华希俊,郝静文,王蓉,张培耘,丁积霖,符永宏..泥浆泵高铬铸铁材料激光淬火技术及其摩擦磨损性能研究[J].表面技术,2017,46(6):215-220,6.基金项目
国家自然科学基金资助项目(51375211) （51375211）
江苏省工业支撑项目(BE2014115) （BE2014115）
江苏省自然科学基金(BK20130524) National Natural Science Foundation of China(51375211), Industrial Support Project of Jiangsu Province, China(BE2014115), Natural Science Foundation of Jiangsu Province, China(BK20130524) （BK20130524）
