FIELD: chemical and heat treatment processes, namely nitriding parts of construction steels in gas medium, possibly in machine engineering and other branches of industry.
SUBSTANCE: method comprises steps of preliminary heat treatment including stages of normalizing, tempering, quenching, annealing and controlling microstructure of part before nitriding; stabilizing tempering after preliminary mechanical working and then nitriding part surface at temperature 530°C during stages of heating, soaking and cooling in dissociated ammonium medium; denitriding surface layer of part at temperature 530 - 550°C and performing dehydrogenation annealing.
EFFECT: increased rigidity and wear resistance, lowered fragileness of surface layer of parts of construction steels.
1 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR NITRIDING CORROSION-RESISTANT AND HIGH-ALLOY STEELS | 2020 |
|
RU2756547C1 |
| NITRATION OF MACHINE PARTS WITH PRODUCTION OF NANOSTRUCTURED SURFACE PLY AND PLY COMPOSITION | 2012 |
|
RU2522872C2 |
| PROCESSING METHOD OF STEEL PRODUCTS IN GASEOUS MEDIUM | 2007 |
|
RU2367716C1 |
| PROCESS DETERMINING CORROSION RESISTANCE OF DIFFUSION LAYER OF PART FROM STRUCTURAL STEEL | 1993 |
|
RU2090861C1 |
| METHOD OF PRODUCTION OF COMPONENT PARTS MADE OUT OF STRUCTURAL STEELS | 2001 |
|
RU2250273C2 |
| METHOD FOR TWO-STAGE GASEOUS NITRIDING OF STEEL PRODUCTS | 0 |
|
SU1014986A1 |
| PROCESS FOR MAKING NITRIDED ELONGATED PARTS | 0 |
|
SU899712A1 |
| METHOD OF NITRIDE HARDENING OF STEEL WITH DOUBLE THERMOCHEMICAL TREATMENT | 2000 |
|
RU2184796C2 |
| CONSTRUCTION ALLOYED STEEL | 1995 |
|
RU2089643C1 |
| METHOD FOR NITRIDING BLANKS FROM STEEL | 2022 |
|
RU2801624C1 |
