FIELD: ferrous metallurgy, namely manufacture of rolled bars for making rollers and races of rolling bearing assemblies.
SUBSTANCE: method comprises steps of melting ball-bearing steel of given kind; casting it; heating ingot for rolling and subjecting it to accelerated after-deformation cooling in cooling apparatuses till temperature of self-tempering in range 690 -630°C. At such treatment eutectic carbide separation along grains boundaries in the form of residues of carbide net in hot rolled piece is no more than 3 marks of scale №4 of given technical standard.
EFFECT: shortened time period of spheroidizing annealing, lowered expenses for energy consumption at heat treatment.
2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR MAKING ROLLED PIECES OF BALL BEARING STEELS | 2001 |
|
RU2201973C2 |
| METHOD FOR PRODUCING OF ROLLED ROUND PROFILED SECTIONS FOR BEARING ROLLING BODIES | 2006 |
|
RU2320733C1 |
| METHOD OF MAKING ROLLED SECTIONS OF BEARING STEEL | 0 |
|
SU648297A1 |
| METHOD FOR PRODUCING STARTING STRIP FROM HYPEREUTECTOID STEELS IN HEAVY BUNDLES | 0 |
|
SU1775195A1 |
| PRODUCTION METHOD OF REBAR FROM SILICON-MANGANESE STEEL | 2008 |
|
RU2376392C1 |
| METHOD OF TREATING TOOL STEEL | 0 |
|
SU1813107A3 |
| METHOD OF PRODUCING ROLLED STOCK OF BEARING AND TOOL POST-EUTECTOIDAL STEELS | 0 |
|
SU1224024A1 |
| METHOD OF ROLLED WIRE MANUFACTURING FOR HARD-WROUGHT FITTINGS | 2007 |
|
RU2333261C1 |
| PROCEDURE FOR PRODUCTION OF PLATE STEEL | 2010 |
|
RU2414516C1 |
| METHOD FOR HEAT TREATMENT OF RAILS | 1991 |
|
RU2023026C1 |
