PL430208A1 - Method of producing a bearing with an increased minimum hardness of 850 HV1 from 38HMJ steel - Google Patents
Method of producing a bearing with an increased minimum hardness of 850 HV1 from 38HMJ steelInfo
- Publication number
- PL430208A1 PL430208A1 PL430208A PL43020819A PL430208A1 PL 430208 A1 PL430208 A1 PL 430208A1 PL 430208 A PL430208 A PL 430208A PL 43020819 A PL43020819 A PL 43020819A PL 430208 A1 PL430208 A1 PL 430208A1
- Authority
- PL
- Poland
- Prior art keywords
- rings
- bearing
- 38hmj
- steel
- temperature
- Prior art date
Links
Landscapes
- Heat Treatment Of Articles (AREA)
- Rolling Contact Bearings (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
Przedmiotem wynalazku jest sposób wykonywania pierścieni łożyska o podwyższonej twardości minimalnej 850 HV1 ze stali 38HMJ obejmujący czynności technologiczne w procesie obróbki cieplnochemicznej. Sposób wykonywania łożyska o podwyższonej twardości ze stali 38HMJ obejmujący proces obróbki cieplno-chemicznej, charakteryzuje się tym, że obejmuje następujące po sobie czynności: wytoczone pierścienie nagrzewa się do temperatury austenityzacji 880 ÷ 920°C, następnie pierścienie chłodzi się w medium chłodzącym - oleju o temperaturze 70 ÷ 100°C lub roztworze soli korzystnie 44% NaNO2 i 56% KNO3, o temperaturze 160 ÷ 180°C, kolejno pierścienie poddaje się wysokiemu odpuszczaniu w temperaturach 550 ÷ 600°C przez 90 ÷ 180 minut, następnie pierścienie poddaje się obróbce szlifierskiej, szlifując czoło pierścieni, bieżnie i średnice, kolejno pierścienie poddaje się azotowaniu w atmosferze gazowej o składzie 55 ÷ 75% NH3zdys, 40 ÷ 20% NH3, N2 5%, na głębokość do 0,3 mm lub azotonawęglaniu w atmosferze 40 ÷ 60% NH3, 60 ÷ 40% CH4 na głębokości 0,03 mm, w zakresie temperatur 500 ÷ 520°C, w czasie od 90 do 300 minut, finalnie dogładza się oscylacyjnie bieżnie pierścieni łożyskowych.The subject of the invention is a method of making bearing rings with an increased minimum hardness of 850 HV1 from 38HMJ steel, including technological activities in the heat-chemical treatment process. The method of making a bearing with increased hardness of 38HMJ steel, including the process of thermo-chemical treatment, is characterized by the following steps: the extruded rings are heated to the austenitizing temperature of 880 ÷ 920 ° C, then the rings are cooled in a cooling medium - oil with temperature 70 ÷ 100 ° C or salt solution, preferably 44% NaNO2 and 56% KNO3, at a temperature of 160 ÷ 180 ° C, then the rings are subjected to high tempering at temperatures of 550 ÷ 600 ° C for 90 ÷ 180 minutes, then the rings are processed grinding, grinding the face of the rings, raceways and diameters, successively, the rings are nitrided in a gas atmosphere of 55 ÷ 75% NH3diss, 40 ÷ 20% NH3, N2 5%, to a depth of 0.3 mm or nitrocarburizing in an atmosphere of 40 ÷ 60 % NH3, 60 ÷ 40% CH4 at a depth of 0.03 mm, in the temperature range 500 ÷ 520 ° C, during 90 to 300 minutes, the oscillating raceways of the bearing rings are finally superfinished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL430208A PL243280B1 (en) | 2019-06-11 | 2019-06-11 | Method of producing a bearing with an increased minimum hardness of 850 HV1 from 38HMJ steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL430208A PL243280B1 (en) | 2019-06-11 | 2019-06-11 | Method of producing a bearing with an increased minimum hardness of 850 HV1 from 38HMJ steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL430208A1 true PL430208A1 (en) | 2020-12-14 |
| PL243280B1 PL243280B1 (en) | 2023-07-31 |
Family
ID=73727770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL430208A PL243280B1 (en) | 2019-06-11 | 2019-06-11 | Method of producing a bearing with an increased minimum hardness of 850 HV1 from 38HMJ steel |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL243280B1 (en) |
-
2019
- 2019-06-11 PL PL430208A patent/PL243280B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL243280B1 (en) | 2023-07-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102888610A (en) | Thermal treatment method for internal spline gear with small modulus | |
| CN102912282A (en) | Secondary carburizing technological method of 16Cr3NiWMoVNbE material | |
| CN106319535B (en) | Heat treatment method for gear shaft | |
| CN107245691B (en) | Surface strengthening method for metal material composite heat treatment | |
| JP2009052119A (en) | Heat-treatment method for steel, method for producing machine part, and machine part | |
| CN104498966A (en) | Process for tufftriding amino gas | |
| RU2532777C1 (en) | Combined chemical-thermal treatment of machine parts of heat-resistant steels | |
| CN108588388A (en) | A kind of heat treatment method for gear wheel | |
| CN105886739A (en) | Processing technology for hinge shaft for low temperature environment | |
| PL430208A1 (en) | Method of producing a bearing with an increased minimum hardness of 850 HV1 from 38HMJ steel | |
| EA202092198A2 (en) | METHOD FOR PRODUCING ROLLED STEEL | |
| JP2015531029A (en) | Method for heat treating steel components and steel components | |
| RU2404267C1 (en) | Method of heat treatment of items from chromium tool steel | |
| CN104404219A (en) | Spring heat treatment method | |
| CN110079652B (en) | Method for producing a steel component | |
| KR950006218A (en) | Valve drive device for internal combustion engine | |
| CN105925773A (en) | Heat treatment method for steel | |
| SU502046A1 (en) | The method of annealing granular perlite steel billets | |
| JP2005133212A (en) | Heat treatment system | |
| JP7370141B2 (en) | Raceway members and rolling bearings | |
| JP2005133211A (en) | Heat treatment system | |
| JP2005133214A (en) | Heat treatment system | |
| JP2021138974A (en) | Heat treatment method and workpiece | |
| CN106893835A (en) | A kind of Technology for Heating Processing of rocking arm | |
| CN106757059A (en) | A kind of Technology for Heating Processing of rocking arm |