| 摘要 |
Cylinder running surface layer applied by plasma spraying has a number of open pores and has a degree of porosity of 0.5-10%. The average pore size is 1-50 microns. The pores are distributed dimensionally or in a planar manner in the running surface layer surface. The cylinder running surface layer surface contains 0.5-8 wt.% oxygen with iron oxide (FeO) and iron oxide (Fe3O4) crystals to form a solid lubricant. The roughness of the cylinder running surface layer is adjusted to 0.02-0.4 microns (average roughness) with a depth of 0.5-5 microns. An Independent claim is also included for a process for the production of a cylinder running surface layer. Preferred Features: The cylinder running surface layer has a Vickers micro-hardness HV0.3 of 350-550 N/mm squared. The cylinder running surface layer has the following composition: 0.05-1.5 wt.% carbon (C), 0.05-3.5 wt.% manganese (Mn), 0.05-18 wt.% chromium (Cr), 0.01-1 wt.% silicon (Si), 0.001-0.4 wt.% sulfur (S) and a balance of iron (Fe). |
