Saky Irin gbejade 440 jara hardenable martensitic alagbara, irin sheets & farahan 440A, 440B, 440C
AISI 440A, UNS S44002, JIS SUS440A, W.-nr. 1.4109 (DIN X70CrMo15) irin alagbara, irin sheets, farahan, ile adagbe
AISI 440B, UNS S44003, JIS SUS440B, W.-nr. 1.4112 (DIN X90CrMoV18) irin alagbara, irin sheets, farahan, ile adagbe
AISI 440C, UNS S44004, JIS SUS440C, W.-nr. 1.4125 (DIN X105CrMo17) irin alagbara, irin sheets, awo, ile adagbe
440A 440B 440C paati kemikali:
| Ipele | C | Si | Mn | S | P | Cr | Ni | Mo |
| 440A | 0.60 ~ 0.75 | ≤1 | ≤1 | ≤0.030 | ≤0.040 | 16.00 ~ 18.00 | - | ≤0.75 |
| 440B | 0.85 ~ 0.95 | ≤1 | ≤1 | ≤0.030 | ≤0.035 | 16.00 ~ 18.00 | ≤0.60 | ≤0.75 |
| 440C | 0.95 – 1.20 | ≤1 | ≤1 | ≤0.030 | ≤0.040 | 16.00 ~ 18.00 | - | ≤0.75 |
Akoonu erogba ati lile ti 440A-440B-440C pọ si ni itẹlera lati ABC (A-0.75%, B-0.9%, C-1.2%). 440C jẹ irin alagbara ti o ga julọ ti o dara pupọ pẹlu lile ti 56-58 RC. Awọn irin mẹta wọnyi ni ipata ipata ti o dara, 440A dara julọ, ati 440C ni o kere julọ. 440C jẹ wọpọ pupọ. Ipilẹ kemikali ti irin alagbara martensitic jẹ ifihan nipasẹ afikun awọn eroja bii molybdenum, tungsten, vanadium, ati niobium ti o da lori apapo awọn ẹya oriṣiriṣi ti 0.1% -1.0% C ati 12% -27% Cr. Níwọ̀n bí ẹ̀ka àsopọ̀ ti jẹ́ ìgbékalẹ̀ onígun tí ó dojúkọ ara, agbára náà ń lọ sílẹ̀ kínníkínní ní àwọn òtútù gíga. Ni isalẹ 600 ° C, agbara iwọn otutu ti o ga julọ laarin gbogbo awọn iru irin alagbara, ati pe agbara ti nrakò tun ga julọ. 440A ni o ni o tayọ quenching ati ìşọn-ini ati ki o ga líle. O ni lile ti o ga ju irin 440B ati irin 440C. 440B ti wa ni lilo fun gige irinṣẹ, wiwọn irinṣẹ, bearings ati falifu. O ni lile ti o ga ju irin 440A ati lile ti o ga ju irin 440C. 440C naa ni líle ti o ga julọ ti gbogbo irin alagbara ati irin ti ko gbona ati pe a lo fun awọn nozzles ati awọn bearings. 440F jẹ ite irin ti o ṣe ilọsiwaju awọn ohun-ini ti o rọrun-ge ti irin 440C fun awọn lathes adaṣe.
Akoko ifiweranṣẹ: Oṣu Kẹjọ-17-2018