Saky Karfe Markensitic bakin karfe shine irin chromium bakin karfe wanda ke kula da martaba microstructure a cikin dakin da zafi. Gabaɗaya magana, wani nau'in baƙin ƙarfe ne na bakin ciki. Bayan ya kwashe, zurfin fushi da tashin hankali tsari, da wuya na 440 bakin karfe an inganta shi sosai fiye da sauran bakin ciki da zafi mai tsayayya da karfe. Ana amfani dashi a cikin kerarre ne a cikin kera ku, ko kayan abinci, ko kuma mashin filastik waɗanda ke buƙatar babban kaya da kuma sanya juriya a ƙarƙashin yanayin marasa galihu. Ka'idojin American 440 na Amurka ciki har da: 440A, 440B, 440C, 440f. Abubuwan Carbon na 440a, 440b da 440C sun karu nasara. 440F (Ashem A582) wani nau'in yankan karfe da aka kara da aka kara a kan 440C.
Daidai maki na 440 SS
| Na Amirka | Astm | 440A | 440B | 440C | 440f |
| M | S44002 | S44003 | S44004 | S4402020 | |
| Jafananci | JIS | 2143A | 2140b | 214 440C | Su 440f |
| Na yar ƙasa | In | 1.4109 | 1.4122 | 1.4125 | / |
| China | GB | 7CR17 | 8CR17 | 11C17 9CR18mo | Y11CR17 |
Abubuwan sunadarai na 440 SS
| Maki | C | Si | Mn | P | S | Cr | Mo | Cu | Ni |
| 440A | 0.6-0.75 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440B | 0.75-0.95 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440C | 0.95-1.2 | ≤1.00 | ≤1.00 | ≤0.04 | ≤0.03 | 16.0-18.0 | ≤0.75 | (≤0.5) | (≤0.5) |
| 440f | 0.95-1.2 | ≤1.00 | ≤1.25 | ≤0.06 | ≥0.15 | 16.0-18.0 | / | (≤0.6) | (≤0.5) |
SAURARA: Hasalima darajoji an yarda kuma ba wajibi bane.
Hardness na 440 SS
| Maki | Hardness, annealing (HB) | Jiyya mai zafi (HRC) |
| 440A | ≤255 | ≥54 |
| 440B | ≤255 | ≥56 |
| 440C | ≤269 | ≥58 |
| 440f | ≤269 | ≥58 |
Kamanni iri na yau da kullun na sakin karfe 440 subs banta bakin karfe yana da halaye na taurara ta hanyar quenching ta hanyar magani mai zafi. Gabaɗaya, 440A yana da mafi girman ƙarfin aiki da ƙarfi, da kuma tauri ya fi na 440B da 440C. 440B yana da mafi girman wuya da tauri fiye da 440A da 440C don Kayan aikin kayan, kayan aikin auna, bearings da bawuloli. 440C yana da mafi girman wuya ga duk bakin karfe da zafi resistant karfe don kayan aikin yankan yankan yankuna, nozzles da ɗaukar kaya. 440F shine ƙarfe mai yanke jiki kuma galibi ana amfani dashi a cikin lake ta atomatik.
Lokaci: Jul-07-2020