关键词: 泥浆泵缸套, 磨损, 材料试验, 电子显微镜, 高铬铸铁

Abstract: This paper analyzes ten failed high-chromium cast iron liners of different life time,used in different formations and collected from several oil fields.Metallographic analysis,surface topography analysis by scanning electron microscope,and ferrography analysis of wear de-bris are made.Detailed illustration of the failure process and the essential wear out mechanism gives some new knowledge of theoretical value.With this knowledge,liner material-matching tests are carried out.It shows that despite the reduced chromium content of the current liner by 50%,its life can compare with the current one,and the cost is reduced by 17.8%.It provides efficient data and theoretical basis for developing new model liner and re-ducing cost.

Key words: cylinder liner of mud pump, wear, material test, electron microscope, high-chromium cast iron