Aisi 4340 Karfe | 36CrNiMo4 | 1,6511 | EN24 | 817M40 | SNCM439

Aisi 4340 Karfe |  36CrNiMo4 |  1,6511 |  EN24 |  817M40 |  SNCM439

Short Description:

Aisi 4340 karfe ne a matsakaici carbon, low gami karfe sani na da tauri andstrength a gwada manyan sassan. Aisi 4340 ne kuma daya irin ofnickel chromium molybdenum steels. 4340 gami karfe ne generallysupplied ƙẽƙashe kuma zafin a cikin tensile kewayon 930 - 1080 Mpa.Pre ƙẽƙashe kuma zafin 4340 steels iya zama m surface taurare, ta harshen wuta ko shigar da hardening da kuma ta nitriding. A 4340 karfe yana goodshock da kuma tasiri juriya, kazalika da lalacewa da abrasion resistanc ...


  • Length: 3-5.8mm ko gyare-gyare
  • Surface: black, peeled, ko m juya
  • Heat jiyya: iska-sanyaya, bisa al'ada, annealed, Q & T
  • Smelting tsari: EAF + LF + VD
  • samfurin Detail

    samfurin Tags

    Aisi 4340 karfe

    ne a matsakaici carbon, low gami karfe sani na da tauri da kuma
    ƙarfi a gwada manyan sassan. Aisi 4340 ne kuma daya irin
    nickel chromium molybdenum steels. 4340 gami karfe ne kullum
    kawota ƙẽƙashe kuma zafin a cikin tensile kewayon 930 - 1080 Mpa.
    Pre ƙẽƙashe kuma zafin 4340 steels iya zama m surface taurare, ta

    harshen wuta ko shigar da hardening da kuma ta nitriding. A 4340 karfe yana da kyau
    buga da kuma tasiri juriya, kazalika da lalacewa da abrasion juriya a
    cikin taurare yanayin. Aisi 4340 karfe Properties bayar da kyau ductility
    a annealed yanayin, kyale shi za a lankwashe à ko kafa. Fusion da kuma
    juriya waldi ne kuma zai yiwu tare da mu 4340 gami karfe. ASTM 4340

    material ne sau da yawa amfani inda wasu gami steels ba su da
    hardenability ba ƙarfin da ake bukata. Domin sosai jaddada sassa
    shi ne kyau zabi. Aisi 4340 gami karfe kuma za a iya machined da
    duk m hanyoyin.


    Saboda kasancewa da ASTM 4340 aji karfe ne sau da yawa musanya
    da Turai dangane da matsayin 817M40 / EN24 da 1,6511 / 36CrNiMo4 ko Japan
    tushen SNCM439 karfe. Kana da cikakken data na 4340 karfe kasa.

    1. Aisi 4340 Karfe Musammantawa da Relevant Standards

    kasar USA Birtaniya Birtaniya Japan
    Standard ASTM A29 EN 10250 BS 970 Jis G4103
    maki 4340 36CrNiMo4 /
    1,6511
    EN24 / 817M40 SNCM 439 / SNCM8

    2. ASTM 4340 Steels Kuma Equilvalents Chemical Abun da ke ciki

    Standard Grade C mn P S Si Ni Kr Mo
    ASTM A29 4340 0.38-0.43 0.60-0.80 0,035 0,040 0.15-0.35 1.65-2.00 0.70-0.90 0.20-0.30
    EN 10250 36CrNiMo4 /
    1,6511
    0.32-0.40 0.50-0.80 0,035 0,035 ≦ 0.40 0.90-1.20 0.90-1.2 0.15-0.30
    BS 970 EN24 / 817M40 0.36-0.44 0.45-0.70 0,035 0,040 0.1-0.40 ... 1.00-1.40 0.20-0.35
    Jis G4103 SNCM 439 / SNCM8 0.36-0.43 0.60-0.90 0,030 0,030 0.15-0.35 1.60-2.00 0.60-1.00 0.15-0.30

    3. Aisi Alloy 4140 Karfe inji Properties

    Mechannical Properties

    (Heat Bi Yanayin)

    yanayin Hukuncin sashe
    mm
    Tensile ƙarfi MPa Amfanin ƙasa ƙarfi
    MPa
    Elong.
    %
    Izod Impact
    J
    Brinell
    taurin
    T 250 850-1000 635 13 40 248-302
    T 150 850-1000 665 13 54 248-302
    U 100 930-1080 740 12 47 269-331

    V 63 1000-1150 835 12 47 293-352
    W 30 1080-1230 925 11 41 311-375
    X 30 1150-1300 1005 10 34 341-401

    Y 30 1230-1380 1080 10 24 363-429
    Z 30 1555- 1125 5 10 444-

    thermal Properties

    Kadarorin tsarin awo na mallaka
    Thermal fadada co-m (20 ° C / 68 ° F, misali man ƙẽƙashe, 600 ° C (1110 ° F) fushi 12,3 μm / m ° C 6,83 μin / a ° F
    Thermal watsin (hankula karfe) 44,5 W / MK 309 BTU a / hr.ft². ° F

    4. Forging na 4340 Alloy Karfe

    Preheat

    da karfe 4340 na farko, zafi sama zuwa 1150 ° C - 1200 ° C iyakar for ƙirƙirãwa,
    rike har zafin jiki ne uniform a ko'ina cikin sashe.

    Kada ku ƙirƙira

    kasa 850 ° C. 4340 yana da kyau Forging halaye amma kula dole ne a
    dauka a lokacin da sanyaya matsayin karfe nuna laulayi fatattaka.
    Wadannan Forging aiki da aikin yanki ya kamata a sanyaya kamar yadda sannu a hankali kamar yadda

    zai yiwu. Kuma sanyaya a cikin yashi ko bushe lemun tsami bada shawarar da dai sauransu

    5. Aisi 4340 Karfe Grade Heat jiyya

    • danniya ya ɗauke

    Domin

    pre-taurare karfe danniya ya ɗauke aka samu da dumama karfe 4340
    zuwa tsakanin 500 zuwa 550 ° C. Heat zuwa 600 ° C - 650 ° C, rike har zafin jiki

    ne uniform a ko'ina cikin sashe, jiƙa for 1 hour da 25 mm sashe,
    da kuma kwantar a yanzu iska.

    • Annealing

    A

    cikakken anneal iya yi a 844 ° C (1550 F) bi sarrafawa
    (makera) sanyaya a wani kudi ba da sauri fiye da 10 ° C (50 F) awa saukar zuwa

    315 ° C (600 F). Daga 315 ° C 600 F shi yana iya zama iska sanyaya.

    • Tempering

    Aisi

    4340 gami karfe kasance a cikin zãfi bi da ko bisa al'ada da zafi
    bi da yanayin kafin tempering. A tempering zazzabi for
    dogara kan karfin matakin da ake so. Domin karfin matakan a cikin 260 -

    280 ksi kewayon fushi a 232 ° C (450 F). Domin ƙarfi a cikin 125 - 200
    ksi kewayon fushi a 510 ° C (950 F). Kuma kada zafin da 4340 steels idan
    shi ne a cikin 220 - 260 ksi ƙarfi fuska kamar yadda tempering iya haifar da
    lalacewar tasiri juriya domin wannan matakin na da ƙarfi.

    Tempering kamata a kauce masa idan zai yiwu a cikin kewayon 250 ° C - 450 ° C saboda zafin brittleness.

    • Flame ko shigar da hardening

    Kamar yadda aka ambata a sama, pre-ƙẽƙashe kuma zafin 4340 karfe sanduna ko faranti na iya zama m surface taurare, ta ko dai harshen wuta ko shigar da hardening

    hanyoyin sakamakon wani hali taurin a wuce haddi na RC 50. Aisi 4340
    karfe sassa kamata a mai tsanani da sauri zuwa ga da austenitic
    zazzabi range (830 ° C - 860 ° C) da ake bukata hali zurfin bi ta
    wani nan da nan mai ko ruwa quenching, dangane bisa taurin ake bukata,
    workpiece size / siffar da quenching shirye-shirye.

    Wadannan
    quenching to mika dumi, tempering a 150 ° C - 200 ° C zai rage gajiyan
    a cikin yanayin da kadan sakamako a kan ta daga bãyan wancan.

    All de-carburised surface abu na farko dole ne a cire don tabbatar da mafi kyau da sakamakon.

    • Nitriding

    Ƙẽƙashe

    kuma zafin 4340 gami karfe kuma za a iya nitrided, bada wani surface
    taurin har zuwa RC 60. Heat zuwa 500 ° C - 530 ° C da kuma rike for isasshen
    lokaci (daga 10 zuwa 60 hours) wajen samar da zurfin hali. Nitriding

    ya kamata a bi da jinkirin sanyaya (babu ice), Munã rage matsalar da
    murdiya. A nitrided sa 4340 kayan iya sabili da haka za machined
    zuwa kusa da karshe size, barin wani karamin nika allowance kawai. A tensile

    ƙarfin da 4340 karfe abu core ne yawanci ba ya canzawa tun
    da nitriding zafin jiki fuska ne kullum a kasa asali
    tempering zafin jiki aiki.

    Surface taurin achievable ne 600 zuwa 650HV.

    6. Machinability

    Machining

    ne mafi kyau yi tare da gami karfe 4340 a annealed ko bisa al'ada
    da kuma zafin yanayin. Yana za ta iya daukar machined da duk al'ada
    hanyoyin kamar sawing, juya, hakowa da dai sauransu Duk da haka, a cikin babban
    karfin yanayin 200 ksi ko mafi girma da machinability ne kawai daga

    25% zuwa 10% cewa daga cikin gami a cikin annealed yanayin.

    7. Welding

    Welding

    na karfe 4340 a ƙẽƙashe kuma zafin yanayin (as kullum
    kawota), ba da shawarar da ya kamata a kauce masa idan a duk zai yiwu,
    saboda hatsarin ice fatattaka, a matsayin inji Properties
    za a canza a cikin Weld zafi shafa zone.

    Idan waldi

    dole ne a za'ayi, pre-zafi zuwa 200 zuwa 300 ° C da kuma kula da wannan yayin da
    waldi. Nan da nan bayan waldi danniya taimaka a 550 zuwa 650 ° C, kafin

    su hardening da kuma tempering.

    Idan waldi a ƙẽƙashe kuma
    zafin yanayin ne da gaske zama dole, sa'an nan aikin yanki, nan da nan

    a kan sanyaya a mika dumi, ya kamata idan zai yiwu danniya kuranye a 15 ° C

    da ke ƙasa asali tempering zazzabi.

    8. Application na 4340 Karfe

    Aisi

    4340 karfe da aka yi amfani da mafi masana'antu sassa na aikace-aikace bukata
    mafi girma tensile / amfanin ƙasa ƙarfi daga 4140 karfe iya samar.

    Wasu hankula aikace-aikace kamar:

    • Aircraft Saukowa Gear

    • Automotive,

    • Oil and Gas hakowa,

    • bisa ƙirƙira,

    • Dumi da kuma Cold kafa,

    • Machine Building,

    • Sauye Systems, kamar ikon watsa giya da shafts.

    • Janar

      injiniya masana'antu da kuma tsarin yin amfani da aikace-aikace, kamar: nauyi
      wajibi shafts, giya, axles, spindles, couplings, fil, chucks, kyawon tsayuwa da dai sauransu


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