Field wear tests of ploughshares in the southern Xinjiang region.

• The gradual transition of the plowshare from the initial wear stage to the stable wear stage. • Changes in wear size are concentrated at the edge of the plowshare. • Dp value is less than 0.2, the wear mechanism is micro-plowing. • The coupling of abrasive wear, impact wear and corrosive wear exacerbates the wear of the plowshare. The ploughshare represents a pivotal component of high-speed plough. The condition of the ploughshare's wear and tear directly affects a soil tilling operation. This paper carries out experimental field wear studies on the ploughshare of a high-speed plough to investigate the changes in mass, thickness, cutting edge parameters, wear profile, 3D wear morphology, microscopic wear morphology, and tissue composition of the 65Mn ploughshare in 35 ha, 70 ha, 105 ha, and 140 ha cultivation areas, and calculates the degree of penetration (D p value) of the wear surface to analyze the wear mechanism, with a view to prolonging the service life of the ploughshare from the perspective of its design and materials. The results showed that the ploughshare showed adaptive wear changes in response to cultivation, most pronounced in the first 35 ha. The wear rate of the ploughshare shows a decreasing trend with the increase of the cultivated area, indicating a gradual transition from the initial wear stage to the stable wear stage. During cultivation, the stresses are concentrated in the ploughshare cutting edge area, and the wear size of the cutting edge varies significantly. Wear of the ploughshare in parts other than the cutting edge is dominated by a reduction in thickness. The roughness of the wear surface stabilized at about 0.4 μm throughout the wear period. With the change of Y-axis position, the wear mechanism changes from impact wear to micro-ploughing, and finally the form of micro-ploughing action decreases gradually. The D p values of the calculated wear surface grooves are all less than 0.2, and the wear mechanism is micro-plowing. Observation of the microscopic wear morphology reveals traces of corrosive wear in addition to abrasive wear, where the soil reacts chemically with the metal and cracks the surface and subsurface layers of the metal. The coupling of abrasive wear, impact wear and corrosive wear exacerbates the wear of the ploughshare. [ABSTRACT FROM AUTHOR]