FIELD: metallurgy.
SUBSTANCE: pearlite rail is obtained by performing at least rough hot rolling and final hot rolling of bloom containing the following, wt %: C - 0.65-1.20, Si - 0.05-2.00, Mn - 0.05-2.00, iron and impurities are the rest; at that, final hot rolling is performed at surface temperature of rail head within not more than 900°C to not less than Ar3 conversion temperature or Arcm conversion temperature till total decrease of surface area of rail head is not less than 20% and relative counter-force is not less than 1.25. Rail head surface subject to final hot rolling is subject to quick cooling to the temperature of not more than 590°C with cooling rate of 2 to 30°C/sec.
EFFECT: improving wear resistance and ductility of rail, providing hardness of rail head within specified limits.
2 cl, 5 tbl, 8 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| RAILROAD RAIL FROM PERLITIC STEEL WITH HIGH RESISTANCE TO WEAR AND HIGH IMPACT STRENGTH AND METHOD OF ITS PRODUCTION | 1994 |
|
RU2107740C1 |
| RAIL OF STEEL WITH ELEVATED WEAR- AND FATIGUE-DAMAGE RESISTANCE AND METHOD OF MANUFACTURING THEREOF | 1996 |
|
RU2113511C1 |
| RAILS FROM LOW-ALLOYED HEAT-TREATED PERILIT STEEL FEATURING HIGH WEAR RESISTANCE AND WELDABILITY AND METHOD OF THEIR PRODUCTION | 1996 |
|
RU2139946C1 |
| RAIL FROM PERLITIC STEEL WITH HIGH WEAR RESISTANCE AND METHOD OF RAIL MANUFACTURE | 1995 |
|
RU2112051C1 |
| RAIL FROM HIGH-CARBON PEARLITE STEEL WITH EXCELLENT DUCTILITY, AND METHOD FOR ITS OBTAINING | 2010 |
|
RU2488643C1 |
| RAILS FROM PEARLITE STEEL WITH EXCELLENT WEAR RESISTANCE AND IMPACT STRENGTH | 2010 |
|
RU2485201C2 |
| PEARLITE RAILS | 2010 |
|
RU2476617C1 |
| METHOD OF PRODUCING HIGH-STRENGTHENING STEEL VALVE RAILS | 2013 |
|
RU2683403C2 |
| RAIL WITH PERLITE STRUCTURE THAT FEATURES HIGH RESISTANCE TO ABRASION AND IMPACT RESISTANCE | 2009 |
|
RU2461639C1 |
| RAIL STEEL AND METHOD OF MAKING RAILS THEREFROM | 2020 |
|
RU2832531C1 |
