FIELD: ferrous metallurgy, namely processes for heat treatment of rail straps used in upper structures of railway roads.
SUBSTANCE: method comprises steps of heating rail straps till temperature 860 - 880°C; piercing openings in them and cooling them in incombustible iron-containing salt of poly-acrylic acid diluted by water at relation 1 : 8 at temperature 20 - 60°C. Invention provides lowered inter-flake spacing of pearlite and reduced quantity of free -structure ferrite in surface layer of straps.
EFFECT: improved operational strength, increased rigidity of straps, enhanced ecology of manufacturing process.
2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF HEAT TREATMENT OF RAILS | 2005 |
|
RU2283353C1 |
| METHOD FOR HEAT TREATMENT OF RAILS | 1991 |
|
RU2023026C1 |
| METHOD OF HEAT TREATMENT OF WHOLE-ROLLED RAILWAY WHEELS | 2016 |
|
RU2632507C1 |
| METHOD OF THE RAILS THERMAL TREATMENT | 2005 |
|
RU2294387C1 |
| METHOD OF HEAT TREATMENT OF STEELS WITH LOW (LH) AND REGULATED (RH) HARDENING ABILITY OF 4TH GENERATION | 2019 |
|
RU2739462C1 |
| METHOD OF CAST STEEL PARTS CONTROLLED THERMAL TREATMENT | 2015 |
|
RU2606665C1 |
| METHOD OF METAL STRUCTURE ALLOY THERMAL TREATMENT | 2010 |
|
RU2447163C1 |
| SEAMLESS ROLLED RAILWAY WHEEL MANUFACTURE METHOD | 1998 |
|
RU2138565C1 |
| PRODUCTION OF HYPEREUTECTIC STEEL RAIL WITH QUENCHED HEAD | 2010 |
|
RU2579319C2 |
| HARD ALLOY QUENCHING METHOD | 2005 |
|
RU2294261C1 |
