AISI 4340 Karfe 36CrNiMo4 1.6511 EN24 817M40 SNCM439

AISI 4340karfeCarbon matsakaici ne, ƙaramin ƙarfe mai ƙarancin ƙarfi wanda aka sani don tauri da ƙarfi a cikin manyan sassa. AISI 4340 kuma nau'in nickel chromium molybdenum karafa ne. 4340 gami da ƙarfe gabaɗaya ana ba da taurare da zafin rai a cikin kewayon tensile na 930 – 1080 Mpa. Ƙarƙashin ƙarfe na 4340 da aka rigaya da zafin jiki na iya ƙara taurare ta hanyar harshen wuta ko taurin induction da kuma ta nitriding. Karfe na 4340 yana da kyakykyawar girgiza da juriya gami da juriya da juriya a cikin yanayin taurare. AISI 4340 kaddarorin karfe suna ba da kyakkyawar ductility a cikin yanayin da ba a taɓa gani ba, yana ba da damar lankwasa ko kafa. Fusion da juriya waldi ne kuma zai yiwu tare da mu 4340 gami karfe. Ana amfani da kayan ASTM 4340 sau da yawa inda sauran ƙarfe na ƙarfe ba su da taurin don ba da ƙarfin da ake buƙata. Don ɓangarorin da aka matsa sosai yana da kyakkyawan zaɓi. AISI 4340 gami da ƙarfe  kuma ana iya sarrafa shi ta duk hanyoyin al'ada.

Saboda samuwan ƙarfe na ASTM 4340 sau da yawa ana musanya shi da ƙa'idodin Turai 817M40 / EN24 da 1.6511 / 36CrNiMo4 ko Japan tushen SNCM439 karfe. Kuna da cikakkun bayanai na 4340 karfe a ƙasa.

1. AISI Alloy 4340 Karfe Supply Range

4340 Karfe Round Bar: diamita 8mm - 3000mm (*Dia30-240mm a cikin hannun jari a cikin yanayin da ba a taɓa gani ba, jigilar kayayyaki nan da nan)

4340 Karfe Plate: kauri 10mm - 1500mm x nisa 200mm - 3000mm

4340 Karfe Grade Square: 20mm - 500mm

Ƙarshen Sama: Black, Rough Machined, Juya ko kamar yadda aka ba da buƙatun.

2. AISI 4340 Ƙayyadaddun Ƙarfe da Ma'auni masu dacewa

3. ASTM 4340 Karfe Da Daidaituwar Sinadarai

4. AISI Alloy 4340 Karfe Kayan aikin injiniya

Thermal Properties

5. Karfe 4340 Alloy Karfe

Preheat karfe 4340 na farko, zafi har zuwa 1150 ° C - 1200 ° C matsakaicin don ƙirƙira, riƙe har sai zafin jiki ya zama iri ɗaya a cikin sashin.

Kar a yi sanyi a ƙasa da 850 ° C. 4340 yana da halaye masu kyau na ƙirƙira amma dole ne a kula yayin sanyaya kamar yadda ƙarfe ya nuna yiwuwar fashewa. Bayan aikin ƙirƙira ya kamata a sanyaya ɓangaren aikin a hankali a hankali. Kuma ana bada shawarar sanyaya a cikin yashi ko busassun lemun tsami da dai sauransu.

6. AISI 4340 Karfe Grade Heat Jiyya

• Rage damuwa

Don kawar da damuwa na ƙarfe da aka rigaya yana samuwa ta hanyar dumama karfe 4340 zuwa tsakanin 500 zuwa 550 ° C. Yi zafi zuwa 600 ° C - 650 ° C, riƙe har sai yawan zafin jiki ya zama iri ɗaya a ko'ina cikin sashin, jiƙa na awa 1 a kowane yanki na 25 mm, kuma kwantar da hankali a cikin iska.

• Annealing

Ana iya yin cikakken anneal a 844°C (1550F) sannan kuma sarrafa (tanderu) sanyaya a cikin ƙimar da ba ta sauri fiye da 10°C (50F) a cikin awa ɗaya zuwa 315°C (600F). Daga 315°C 600F ana iya sanyaya iska.

• Haushi

AISI 4340 gami karfe ya kamata a cikin zafi bi da ko normalize da zafi bi da yanayin kafin tempering. Yanayin zafin jiki don ya dogara da ƙarfin ƙarfin da ake so. Don matakan ƙarfi a cikin zafin kewayon 260 – 280 ksi a 232°C (450F). Don ƙarfi a cikin zafin kewayon 125 – 200 ksi a 510°C (950F). Kuma kada ku yi fushi da 4340 karfe idan yana cikin ƙarfin ƙarfin 220 - 260 ksi kamar yadda yanayin zafi zai iya haifar da lalata juriya ga wannan ƙarfin.

Ya kamata a guje wa zafin jiki idan zai yiwu a cikin kewayon 250 ° C - 450 ° C saboda tashin hankali.

• Harden wuta ko Induction Hardening

Kamar yadda aka ambata a sama, sandunan ƙarfe ko faranti na 4340 da aka riga aka gama da su za a iya ƙara taurare ta ko dai ta hanyar  harshen wuta ko induction hardening hanyoyin haifar da taurin harka fiye da Rc 50. AISI 4340 sassa karfe ya kamata a mai zafi da wuri-wuri don kewayon zafin jiki na austenitic (830 ° C - 860 ° C) da zurfin shari'ar da ake buƙata ta biyo bayan mai nan da nan ko kashe ruwa, dangane da taurin da ake buƙata, girman workpiece / siffa da shirye-shiryen quenching.

Bayan quenching zuwa hannun dumi, zafin jiki a 150 ° C - 200 ° C zai rage damuwa a cikin yanayin tare da ƙarancin tasiri akan taurinsa.

Dole ne a fara cire duk abubuwan da aka lalatar da su don tabbatar da kyakkyawan sakamako.

• Nitriding

Hardened da tempered 4340 gami karfe kuma za a iya nitrided, bada wani surface taurin har zuwa Rc 60. Heat zuwa 500 ° C - 530 ° C da kuma riƙe don isasshen lokaci (daga 10 zuwa 60 hours) don bunkasa zurfin harka. Nitriding ya kamata a bi shi ta hanyar jinkirin sanyaya (ba quench) rage matsalar murdiya ba. Don haka ana iya sarrafa kayan nitrided na 4340 zuwa kusan girman ƙarshe, barin ƙaramin izinin niƙa kawai. Ƙarfin jigon jigon kayan ƙarfe na 4340 yawanci ba ya yin tasiri tunda kewayon zafin nitriding gabaɗaya yana ƙasa da ainihin zafin zafin da ake aiki dashi.

Taurin saman da ake samu shine 600 zuwa 650HV.

7. Machini

Machining an fi yin aiki tare da gami da ƙarfe 4340 a cikin yanayin da ba a taɓa gani ba ko daidaitacce da yanayin zafi. Ana iya yin shi da sauri ta duk hanyoyin da aka saba amfani da su kamar sawing, juyawa, hakowa da dai sauransu Duk da haka a cikin yanayin ƙarfin ƙarfin 200 ksi ko mafi girma machinability shine kawai daga 25% zuwa 10% na gami a cikin yanayin annealed.

8. Walda

Welding na karfe 4340 a cikin taurare da tempered yanayin (kamar yadda aka saba kawota), ba a ba da shawarar kuma ya kamata a kauce masa idan a kowane zai yiwu, saboda hadarin quench fatattaka, kamar yadda inji Properties za a canza a cikin weld zafi shafi yankin.

Idan dole ne a yi walda, kafin a yi zafi zuwa 200 zuwa 300°C kuma a kiyaye wannan yayin walda. Nan da nan bayan walda danniya sauƙaƙa a 550 zuwa 650 ° C, kafin hardening da tempering.

Idan walda a cikin taurare da yanayin zafi yana da matukar mahimmanci, to, yanki na aiki, nan da nan a kan sanyaya zuwa hannun dumi, ya kamata idan zai yiwu danniya ya sauƙaƙa a 15 ° C ƙasa da asalin zafin jiki na asali.

9. Aikace-aikacen Karfe 4340

AISI 4340 karfe ana amfani da a mafi yawan masana'antu sassa don aikace-aikace bukatar mafi girma tensile / yawan amfanin ƙasa ƙarfi fiye da 4140 karfe iya samar.

Wasu aikace-aikace na yau da kullun kamar:

• Jirgin Saukowa Gear
• Motoci,
• Hako Mai da Gas,
• Ƙirƙira,
• Dumi Da Sanyi,
• Ginin Inji,
• Tsare-tsaren Canja wurin, kamar injin watsa wutar lantarki da shafts.
• Masana'antu na injiniya na gabaɗaya da aikace-aikacen amfani da tsarin, kamar: ƙwanƙolin nauyi, gears, axles, spindles, couplings, fil, chucks, molds da sauransu.

Gnee Karfe yana ɗaya daga cikin manyan masu samar da ƙarfe na AISI 4340 don aikace-aikacen ku daban kamar na sama. Kuma muna samar da karfe 4140, karfe 4130 kuma. Tuntube ni kuma sanar da ni buƙatunku kowane lokaci.