Karfe mai laushi Karfe mai laushi Karfe mai laushi Karfe mai laushi wani nau'in karfe ne na bakin karfe mai kama da chromium wanda ke kula da tsarin martensitic a zafin ɗaki, wanda za'a iya daidaita halayensa ta hanyar maganin zafi (ƙuntawa da dumamawa). Gabaɗaya, wani nau'in karfe ne mai tauri wanda za'a iya taurara shi. Bayan kashewa, rage zafi da kuma rage zafi, an inganta taurin karfen bakin karfe na 440 sosai fiye da na sauran ƙarfe masu jure zafi. Ana amfani da shi sosai wajen kera kayan aiki na ɗaukar kaya, yankewa, ko ƙirar filastik waɗanda ke buƙatar kaya mai yawa da juriya a ƙarƙashin yanayin lalata. Karfe mai laushi na Amurka na jerin 440 wanda ya haɗa da: 440A, 440B, 440C, 440F. Yawan carbon na 440A, 440B da 440C ya ƙaru a jere. 440F (ASTM A582) wani nau'in karfe ne na yankewa kyauta tare da ƙara abun ciki na S bisa ga 440C.
Daidaitattun maki na 440 SS
| Ba'amurke | ASTM | 440A | 440B | 440C | 440F |
| UNS | S44002 | S44003 | S44004 | S44020 | |
| Jafananci | JIS | SUS 440A | SUS 440B | SUS 440C | SUS 440F |
| Jamusanci | DIN | 1.4109 | 1.4122 | 1.4125 | / |
| China | GB | 7Cr17 | 8Cr17 | 11Cr17 9Cr18Mo | Y11Cr17 |
Sinadarin Sinadarai 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) |
Lura: ƙimar da ke cikin maƙallan an yarda da ita kuma ba dole ba ne.
Taurin SS 440
| Maki | Tauri, Rufewa (HB) | Maganin zafi (HRC) |
| 440A | ≤255 | ≥54 |
| 440B | ≤255 | ≥56 |
| 440C | ≤269 | ≥58 |
| 440F | ≤269 | ≥58 |
Kamar ƙarfe na ƙarfe na yau da kullun, ƙarfen bakin ƙarfe na Saky mai jerin 440 Martensite yana da halaye na taurarewa ta hanyar kashewa, kuma yana iya samun nau'ikan kayan aikin injiniya iri-iri ta hanyar maganin zafi daban-daban. Gabaɗaya, 440A yana da kyakkyawan aikin taurarewa da babban tauri, kuma taurinsa ya fi na 440B da 440C. 440B yana da tauri da tauri mafi girma fiye da 440A da 440C don kayan aikin yankewa, kayan aikin aunawa, bearings da bawuloli. 440C tana da mafi girman tauri fiye da dukkan bakin karfe da kuma ƙarfe mai jure zafi don kayan aikin yankewa masu inganci, bututun ƙarfe da bearings. 440F ƙarfe ne mai yankewa kyauta kuma galibi ana amfani da shi a cikin lathes na atomatik.
Lokacin Saƙo: Yuli-07-2020