440C kowiri tira papa papatahihe hua kowiri tira-kounga teitei e mohiotia ana mo tana whakakotahitanga motuhake o te aukati kakahu me te aukati waikura. No te whanau kowiri tira martensitic ka whakamahia i roto i nga momo ahumahi mo tana mahi pai ake.
Paerewa o te 440C Kowiri tira me nga Koeke Tira Taurite
| Whenua | USA | BS & DIN | Hapani |
| Paerewa | ASTM A276 | EN 10088 | JIS G4303 |
| Koeke | S44004/440C | X105CrMo17/1.4125 | SUS440C |
ASTM A276 440C Steel Chemical Composition me te Ōrite o
| Paerewa | Kōeke | C | Mn | P | S | Si | Cr | Mo |
| ASTM A276 | S44004/440C | 0.95-1.20 | ≦1.00 | ≦0.04 | ≦0.03 | ≦1.00 | 16.0-18.0 | ≦0.75 |
| EN10088 | X105CrMo17/1.4125 | 0.95-1.20 | ≦1.00 | ≦0.04 | ≦0.03 | ≦1.00 | 16.0-18.0 | 0.40-0.80 |
| JIS G4303 | SUS 440C | 0.95-1.20 | ≦1.00 | ≦0.04 | ≦0.03 | ≦1.00 | 16.0-18.0 | ≦0.75 |
440C Kowiri tiraHangaiaĀhuatanga
| Paemahana Whakawera (°C) | Te Kaha Tana (MPa) | Kaha Tuku 0.2% Tohu (MPa) | Whakaroa (% i roto i te 50mm) | Rockwell pakeke (HRC) | Pānga Charpy V (J) |
| Kua whakahiato* | 758 | 448 | 14 | 269HB teitei# | - |
| 204 | 2030 | 1900 | 4 | 59 | 9 |
| 260 | 1960 | 1830 | 4 | 57 | 9 |
| 306 | 1860 | 1740 | 4 | 56 | 9 |
| 371 | 1790 | 1660 | 4 | 56 | 9 |
Anei etahi o nga kaupapa matua hei whakauru i te 440C kowiri tira papa papatahi:
1. Hanganga: 440C kowiri tira papa papatahi kei te nuinga o te chromium (16-18%), te waro (0.95-1.20%), me etahi atu mea iti penei i te konupora, te silicon, me te molybdenum.
2. Te Whakaaetanga Wear: Ko te 440C he kowiri tira papatahi he mea rongonui mo te kaha o te kakahu, e pai ana mo nga tono e pa ana ki nga taonga abrasive, nga taputapu tapahi, nga peera, me nga waahanga-aukati.
3. Te Whakaaetanga Waikura: Ahakoa he kowiri tira te waro-nui, he pai te whakaatu a 440C i te waikura.
4. Te pakeke me te kaha: 440C kowiri tira papa papatahi he tino pai te pakeke me te kaha nui, e whakarato ana i te roa me te roa i roto i nga tono tono.
Wā tuku: Hūrae-05-2023