FIELD: metallurgy.
SUBSTANCE: semi-product from Cr-Ni-Mo-V steel is heated for hardening to temperature Ac3 +(30÷50)°C and further tempering at 600÷700°C with cooling in air, then ageing is performed at 450±10°C with holding for 5.0÷10.0 h for complete billet heating, and is cooled in air. At temperature of heating for hardening holding is performed for time as per 2.5÷3.0 min/mm of cross-section, cooling is performed in oil, and during tempering the hold time is 5.0÷6.0 min/mm of cross-section with further cooling in air.
EFFECT: increasing of cold-resistance of martensite steels.
2 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| THERMAL TREATMENT METHOD OF SEMI-FINISHED PRODUCTS FROM HYPOPEARLITIC STEELS | 2008 |
|
RU2373292C1 |
| THERMAL TREATMENT METHOD TO PRODUCE PARTS WITH HIGH DIMENSIONAL ACCURACY | 2020 |
|
RU2734208C1 |
| PROCEDURE FOR HEAT TREATMENT OF FLATS OUT OF LOW CARBON FERRITE-PEARLITE STEEL | 2009 |
|
RU2414517C1 |
| METHOD OF THERMODIFFUSION ZINC COATING FASTENERS FROM BAINITE CLASS STEELS WITH SIMULTANEOUS INCREASE OF COLD RESISTANCE THEREOF | 2015 |
|
RU2607505C1 |
| PROCEDURE FOR THERMAL TREATMENT OF FLAT OF LOW CARBON FERRITE-PEARLITE STEEL | 2009 |
|
RU2427653C1 |
| THERMAL TREATMENT OF WELDS OF LOW-CARBON FERRITE-PERLITE STEELS | 2014 |
|
RU2566241C1 |
| PROCEDURE FOR FABRICATION OF FORGED PIECES OF LOW CARBON FERRITE-PEARLITE STEELS | 2009 |
|
RU2415183C1 |
| HEAT TREATMENT METHOD OF WELDED JOINTS OF LOW CARBON FERRITE-PEARLITE STEELS | 2005 |
|
RU2299252C1 |
| METHOD FOR CHEMICAL-THERMAL PROCESSING OF COMPONENTS FROM MARTENSITIC STEELS | 2014 |
|
RU2574944C1 |
| SEAMLESS HIGH-STRENGTH PIPE OF STEEL OF MARTENSITE GRADE FOR CASING STRINGS AND ITS PRODUCTION METHOD | 2021 |
|
RU2787205C2 |
