Hoʻopuka ʻo Saky Steel i nā pepa kila kila martensitic paʻakikī 440 moʻo a me nā papa 440A, 440B, 440C
AISI 440A, UNS S44002, JIS SUS440A, W.-nr. 1.4109 (DIN X70CrMo15) nā pepa kila kila, nā papa, nā pālahalaha
AISI 440B, UNS S44003, JIS SUS440B, W.-nr. 1.4112 (DIN X90CrMoV18) nā pepa kila kila, nā papa, nā pālahalaha
AISI 440C, UNS S44004, JIS SUS440C, W.-nr. 1.4125 (DIN X105CrMo17) nā pepa kila kila, nā papa, nā pālahalaha
440A 440B 440C ʻāpana kemika:
| Papa | 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 |
Ua piʻi aʻe ka nui o ke kalapona a me ka paʻakikī o 440A-440B-440C mai ABC (A-0.75%, B-0.9%, C-1.2%). He kila kila kiʻekiʻe maikaʻi loa ka 440C me ka paʻakikī o 56-58 RC. Loaʻa i kēia mau kila ʻekolu ke kūpaʻa maikaʻi i ka popo, ʻo 440A ka mea maikaʻi loa, a ʻo 440C ka mea haʻahaʻa loa. He mea maʻamau loa ka 440C. ʻO ke ʻano kemika o ke kila kila martensitic e hōʻike ʻia e ka hoʻohui ʻana o nā mea e like me ka molybdenum, tungsten, vanadium, a me ka niobium e pili ana i ka hui pū ʻana o nā ʻāpana like ʻole o 0.1%-1.0% C a me 12%-27% Cr. ʻOiai he ʻano cubic kikowaena kino ke ʻano o nā ʻiʻo, hāʻule koke ka ikaika i nā mahana kiʻekiʻe. Ma lalo o 600 ° C, ʻo ka ikaika wela kiʻekiʻe ka mea kiʻekiʻe loa ma waena o nā ʻano kila kila āpau, a ʻo ka ikaika kolo hoʻi ka mea kiʻekiʻe loa. Loaʻa iā 440A nā waiwai hoʻopau a paʻakikī maikaʻi loa a me ka paʻakikī kiʻekiʻe. ʻOi aku ka paʻakikī ma mua o ke kila 440B a me ke kila 440C. Hoʻohana ʻia ʻo 440B no nā mea hana ʻokiʻoki, nā mea hana ana, nā bearings a me nā valves. ʻOi aku ka paʻakikī ma mua o ke kila 440A a ʻoi aku ka paʻakikī ma mua o ke kila 440C. ʻO ka 440C ka paʻakikī kiʻekiʻe loa o nā kila kila kila a pau a me ke kila pale wela a hoʻohana ʻia no nā nozzles a me nā bearings. ʻO 440F kahi papa kila e hoʻomaikaʻi i nā waiwai ʻoki maʻalahi o ke kila 440C no nā mīkini hana aunoa.
Ka manawa hoʻouna: Aug-17-2018