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Bakin Karfe Bolts: Hex Bolts da Material maki
2026-08-05
1. Gabatarwa
Bakin karfe yana haɗuwa da juriya na lalata da ƙarfin injina, yana mai da su mahimmanci a duk faɗin gine-gine, ruwa, sarrafa abinci, da masana'antar likita. Ba kamar carbon karfe fasteners bukatar kariya coatings, bakin karfe samu da lalata juriya daga wani kai-warkar da chromium oxide Layer. Wannan jagorar ya ƙunshi abubuwa biyu mafi mahimmanci: ƙirar hex bolt da zaɓin darajar bakin karfe.
2. Hex Bolts
Hex bolts yana fasalta kai mai gefe shida yana ba da damar ingantacciyar jujjuyawar juzu'i ta madaidaitan wrenches ko soket. Zane ya ƙunshi kan mai hexagonal, shank mara zare, yanki mai zare, da tip mai haɗe. Babban fa'idodin sun haɗa da babban ƙarfin juzu'i, samun damar duniya, ingantaccen masana'antu, sake amfani da shi, da bin ka'idodin ƙasashen duniya (ISO 4014, DIN 933, ASTM A325).
Tebur 1. Daidaitaccen Girman Hex Bolt (Bakin Karfe)
| Girman Suna | Zaren Pitch (TPI) | Nisa kai (mm) | Ƙarfin Tensile (MPa) |
| 1/4 - 20 | 20 | 11.1 | 520 |
| 3/8 - 16 | 16 | 14.3 | 520 |
| 1/2 - 13 | 13 | 19.1 | 520 |
| 3/4 - 10 | 10 | 28.6 | 520 |
3. Bakin Karfe Makin
Bakin karfe fasteners an classified zuwa hudu iyalai: austenitic (304, 316 - wadanda ba Magnetic, high lalata juriya), ferritic (430 - Magnetic, tattali), martensitic (410 - hardenable, matsakaici lalata), da hazo-hardening (17-4PH - high ƙarfi). A karkashin ISO 3506, maki suna amfani da lambar lambar haruffa inda A = austenitic, C = martensitic, kuma lambar tana nuna aji ƙarfin ƙarfi (50/70/80).
Tebura 2. Makin Bakin Karfe gama-gari don Bolts
| Daraja | Babban darajar ISO | Tensile (MPa) | Juriya na lalata. | Mabuɗin Abubuwa | Aikace-aikace na yau da kullun |
| 304 | A2-70 | 700 | Yayi kyau | 18% Cr, 8% Ni | Janar manufa, abinci |
| 316 | A4-70 | 700 | Madalla | 16% Cr, 10% Ni, 2% Mo | Marine, sunadarai, likita |
| 410 | C3-80 | 550 | Matsakaici | 12% Cr | Cutlery, bawuloli |
| 17-4PH | A4-80 | 800 | Yayi kyau | 16% Cr, 4% Ni, 4% Cu | Aerospace, babban ƙarfi |
3.1 Zaɓin Matsayi ta Muhalli
Tebur 3. Matsayin da aka ba da shawarar ta muhallin Sabis
| Muhalli | Matsayin da aka Shawarta | Dalili |
| Cikin gida / bushe | 304 (A2) | Isasshen farashi mai sauƙi |
| Waje / Coastal | 316 (A4) | Mo yana tsayayya da harin chloride |
| Sinadaran Shuka | 316L / 904L | Mafi girman juriya acid |
| Babban Ƙarfin Bukatun | 17-4PH (A4-80) | Hazo-taurare |
4. Mahimman Abubuwan La'akari
Galling: Makin Austenitic (304, 316) suna da saurin kama zaren yayin ɗaurewa. Use anti-seize compounds or dissimilar grade pairings (A2 bolt with A4 nut) to mitigate.
Abin sha'awa: Maganin acid (ASTM A967) yana kawar da baƙin ƙarfe kyauta kuma yana haɓaka Layer oxide, inganta juriya na lalata bayan masana'anta.
Magnetism: Makin Austenitic ba na maganadisu ba ne lokacin da aka goge amma yana iya zama wani bangare na maganadisu bayan aikin sanyi. Matsayin Ferritic da Martensitic maki ne na gaske.
5. Kammalawa
Bakin karfe hex bolts sun haɗu da ƙira mai amfani na geometric tare da juzu'in ƙarfe. Daga darajar 304 na tattalin arziki don amfani da gabaɗaya zuwa 17-4PH mai ƙarfi don aikace-aikacen buƙatu, daidaita madaidaicin maki zuwa yanayin sabis yana tabbatar da ingantaccen aiki da tsawon rai.
