PL405012A1 - Method of thermo-mechanical processing of semi-hot forged steel products - Google Patents
Method of thermo-mechanical processing of semi-hot forged steel productsInfo
- Publication number
- PL405012A1 PL405012A1 PL405012A PL40501213A PL405012A1 PL 405012 A1 PL405012 A1 PL 405012A1 PL 405012 A PL405012 A PL 405012A PL 40501213 A PL40501213 A PL 40501213A PL 405012 A1 PL405012 A1 PL 405012A1
- Authority
- PL
- Poland
- Prior art keywords
- temperature
- steel
- thermo
- total
- semi
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title abstract 5
- 239000010959 steel Substances 0.000 title abstract 5
- 238000000034 method Methods 0.000 title abstract 2
- 230000000930 thermomechanical effect Effects 0.000 title abstract 2
- 238000005242 forging Methods 0.000 abstract 4
- 238000005275 alloying Methods 0.000 abstract 2
- 229910001566 austenite Inorganic materials 0.000 abstract 2
- 229910000734 martensite Inorganic materials 0.000 abstract 2
- 229910000859 α-Fe Inorganic materials 0.000 abstract 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910001563 bainite Inorganic materials 0.000 abstract 1
- 238000007664 blowing Methods 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 239000003245 coal Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 235000019362 perlite Nutrition 0.000 abstract 1
- 239000010451 perlite Substances 0.000 abstract 1
- 230000009466 transformation Effects 0.000 abstract 1
Landscapes
- Forging (AREA)
Abstract
Sposób przeróbki cieplnomechanicznej wyrobów stalowych kutych na pólgoraco, zwlaszcza stali o podwyzszonej wytrzymalosci i zawierajacej 0,3% to 0,45% wegla oraz sumarycznie 3-5% pierwiastków stopowych, charakteryzuje sie tym, ze najpierw stal w postaci preta zawierajaca 0,3% do 0,45% wegla oraz sumarycznie 3-5% pierwiastków stopowych jest podgrzana wstepnie do temperatury ok.900-950°C i jest wytrzymana w tej temperaturze przez czas determinowany uzyskaniem równomiernej temperatury na calym przekroju poprzecznym, a nastepnie jest schlodzona ponizej temperatury Ms, gdzie Ms oznacza poczatek temperatury przemiany martenzytycznej. Z kolei pociety na kawalki pret jest nagrzany do temperatury Ae3 + 50-70°C s, jest wytrzymany w tym zakresie temperatur, a nastepnie schlodzony do temperatury, w której stal sklada sie w 100% z austenitu lub w 1/2 do 3/4 z austenitu, a w pozostalej czesci z ferrytu i jest odksztalcona w tej temperaturze z sumarycznym stopniem redukcji ? = 1,2 lub wyzszym, zas bezposrednio po kuciu zrealizowanym na prasie lub mlocie uzyskana odkuwka jest trzymana w narzedziach o temperaturze 120-220°C w czasie odpowiednim do uzyskania struktury martenzytu, bainitu, perlitu lub ich mieszaniny oraz ferrytu, po czym nastepuje wyjecie i wytrzymanie odkuwki w powietrzu bez wymuszonej konwekcji oraz schlodzenie odkuwki do temperatury otoczenia za pomoca wymuszonego nawiewu powietrza o predkosci 18-20 m/s.Method of thermo-mechanical processing of semi-hot forged steel products, especially steel with increased strength and containing 0.3% to 0.45% carbon and in total 3-5% of alloying elements, characterized by the fact that steel in the form of rod containing 0.3% up to 0.45% of coal and a total of 3-5% of alloying elements is preheated to a temperature of about 900-950 ° C and is held at this temperature for a time determined by obtaining a uniform temperature across the entire cross section, and then cooled below the Ms temperature , where Ms means the beginning of the martensitic transformation temperature. In turn, cut into pieces, the rod is heated to Ae3 + 50-70 ° C, is resistant in this temperature range, and then cooled to the temperature at which steel consists of 100% austenite or 1/2 to 3 / 4 from austenite, and the rest from ferrite and is deformed at this temperature with a total reduction ratio? = 1.2 or higher, and immediately after forging carried out on a press or a hammer, the obtained forging is kept in tools at a temperature of 120-220 ° C for a time appropriate to obtain the structure of martensite, bainite, perlite or their mixture and ferrite, followed by removal and withstand the forgings in the air without forced convection and cool the forgings to ambient temperature with the help of forced air blowing at a speed of 18-20 m / s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL405012A PL225286B1 (en) | 2013-08-06 | 2013-08-06 | Method for thermo-mechanical processing of steel semi-hot forged |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL405012A PL225286B1 (en) | 2013-08-06 | 2013-08-06 | Method for thermo-mechanical processing of steel semi-hot forged |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL405012A1 true PL405012A1 (en) | 2014-01-20 |
| PL225286B1 PL225286B1 (en) | 2017-03-31 |
Family
ID=49920893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL405012A PL225286B1 (en) | 2013-08-06 | 2013-08-06 | Method for thermo-mechanical processing of steel semi-hot forged |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL225286B1 (en) |
-
2013
- 2013-08-06 PL PL405012A patent/PL225286B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL225286B1 (en) | 2017-03-31 |
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