FIELD: metallurgy.
SUBSTANCE: heating the steel surface of the rail by directing the high-temperature plasma jet and then cooling to provide a reinforced layer on the side surface of the rail head, according to the invention, the heating is carried out by an air plasma arc at a current strength of 90-160 A, a voltage of 130-160 V, cm/min, product conveying speed of 50-200 cm/min and the distance from the plasmotron nozzle exit to the product surface is 20-30 mm, wherein during the heating process, the plasma arc is split into two heating spots.
EFFECT: improving hardening quality of the working surface of rails subjected to high shock loads by increasing the area and depth of the hardened layer, high hardness and wear resistance, reducing energy intensity and simplifying processing.
1 tbl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| TECHNIQUE OF STEEL RAILS THERMAL TREATMENT | 2007 |
|
RU2343211C2 |
| METHOD OF HEAT TREATMENT OF PROFILED METALLIC SURFACES | 2006 |
|
RU2325449C2 |
| PROCEDURE FOR STRENGHENING RAILROAD WHEELS AND RAILROAD WHEEL WITH STRENGTHENED WORKING SURFACE | 2010 |
|
RU2430166C1 |
| METHOD OF THE THERMAL TREATMENT OF THE FORMING ROLLERS | 2005 |
|
RU2298043C1 |
| METHOD AND APPARATUS FOR SURFACE HARDENING OF HEADS OF ACTIVE RAILWAY STEEL RAILS | 2018 |
|
RU2704051C1 |
| METHOD OF SURFACE HARDENING AND DEVICE FOR ITS EMBODIMENT | 1996 |
|
RU2107739C1 |
| METHOD AND DEVICE FOR HARDENING SURFACE OF RAIL HEAD | 2001 |
|
RU2218430C2 |
| METHOD FOR THERMOMECHANICAL HARDENING OF A RAILWAY WHEEL FLANGE | 2021 |
|
RU2778038C1 |
| METHOD FOR REINFORCING LOCOMOTIVE AND CAR WHEELS | 2010 |
|
RU2454469C2 |
| METHOD OF FABRICATING WORK HOLDERS OF TUBE MILLS AT LENGTHWISE TUBE ROLLING | 2006 |
|
RU2327749C1 |
