Cooling method of rail weld, cooling system of rail welds, rail and welded joints

摘要

The present invention includes a column portion first cooling step of cooling in the temperature range of at least some transformation to pearlite to complete from austenite, the column portion cooling area in the rail weld; said pillar in the rail weld the entire part is after transformation to pearlite, and the pillar portion cooling second step of cooling the column portion cooling area; the head in the rail weld; and foot cooling step of cooling the foot in the rail weld and head cooling step of cooling; has a, assuming that (min) t the cooling time of the pillar portion cooling step and the second column portion cooling process of the first 1, k value -0.1t + 0.63 ≦ is to provide a method of cooling a rail weld satisfies the expression represented by the k ≦ -0.1t + 2.33.