AISI 4340 Steel 36CrNiMo4 1.6511 EN24 817M40 SNCM439

AISI 4340intsimbiyikhabhoni ephakathi, intsimbi ephantsi yealloy eyaziwa ngokuba nokuqina kunye nokomelela kumacandelo amakhulu. I-AISI 4340 ikwalolunye uhlobo lwe-nickel chromium molybdenum steels. Intsimbi ye-4340 ye-alloy inikezelwa ngokubanzi kwaye igxininiswe kuluhlu lwe-tensile ye-930 - 1080 Mpa. Iintsimbi ezingama-4340 ezenziwe zaqina ngaphambili kwaye zinobushushu obungaphezulu bunokuqiniswa ngakumbi ngamadangatye okanye ukwenziwa lukhuni kwe-induction kunye ne-nitriding. Intsimbi ye-4340 inomothuko olungileyo kunye nokuxhathisa impembelelo kunye nokunxiba kunye nokuxhathisa kwe-abrasion kwimeko yokuqina. Iipropati ze-AISI 4340 zetsimbi zinika i-ductility efanelekileyo kwimeko ye-annealed, evumela ukuba igobe okanye yenziwe. I-Fusion kunye ne-resistance welding nayo inokwenzeka ngentsimbi yethu ye-4340 ye-alloy. Izinto ze-ASTM 4340 zihlala zisetyenziswa apho ezinye iintsimbi zealloyi zingenako ukuqina ukunika amandla afunekayo. Kwiindawo ezigxininiswe kakhulu lukhetho oluhle kakhulu. I-AISI 4340 intsimbi ye-alloy inako ukwenziwa ngoomatshini ngazo zonke iindlela zesintu.

Ngenxa yokufumaneka kwe-ASTM 4340 ye-steel ye-grade isoloko ifakwe kwi-European based standard standards 817M40/EN24 kunye ne-1.6511 //36CrNiMo4 okanye i-Japan based SNCM439 steel. Unayo idatha ecacileyo ye-4340 yentsimbi engezantsi.

1. AISI Alloy 4340 Steel Supply Range

4340 Steel Round Bar: ububanzi 8mm – 3000mm (*I-Dia30-240mm kwisitokhwe esikwimeko edibeneyo, ukuthunyelwa kwangoko)

4340 ipleyiti yentsimbi: ubukhulu 10mm – 1500mm x ububanzi 200mm – 3000mm

4340 Steel Grade Square: 20mm - 500mm

Umphezulu Gqiba: Mnyama, rough Machined, Turned okanye ngokweemfuno ezinikiweyo.

2. I-AISI 4340 Ukucaciswa kweNsimbi kunye neMigangatho efanelekileyo

3. I-ASTM ye-4340 yentsimbi kunye ne-Equilvalents Ukuqulunqwa kweekhemikhali

4. AISI Alloy 4340 Steel Mechanical Properties

Iipropati zoThermal

5. Ukwenziwa kwe-4340 Alloy Steel

Ukushisa intsimbi ye-4340 kuqala, ukushisa ukuya kwi-1150 ° C - 1200 ° C ubuninzi bokubumba, ubambe kuze kube yilapho izinga lokushisa lifanayo kulo lonke icandelo.

Musa ukuphosa ngaphantsi kwe-850 °C. I-4340 ineempawu ezintle zokubumba kodwa kufuneka kuthathelwe ingqalelo xa ipholisa njengoko intsimbi ibonisa ukuchaphazeleka ekuqhekekeni. Emva kokusebenza komyinge, umsebenzi kufuneka upholiswe kancinane kangangoko. Kwaye ukupholisa kwisanti okanye kwi-lime eyomileyo kuyacetyiswa njl.

6. I-AISI 4340 yoNyango lweBanga lobushushu leNsimbi

• Ukunciphisa Uxinzelelo

Ukunciphisa uxinzelelo lwentsimbi esele luqinisiwe luphunyezwa ngokufudumeza intsimbi 4340 ukuya phakathi kwama-500 ukuya kuma-550°C. Fudumeza ukuya kuma-600 °C ukuya kuma-650 °C, ubambe de iqondo lobushushu lifane kulo lonke icandelo, cwina iyure e-1 kwindawo ye-25 mm, kwaye uphole emoyeni opholileyo.

• Ukuhlaziya

I-anneal epheleleyo inokwenziwa kwi-844 ° C (1550 F) ilandelwa kukupholisa okulawulwayo (kwiziko) ngesantya esingekho ngokukhawuleza kune-10 ° C (50 F) ngeyure ukuhla ukuya kuma-315 ° C (600 F). Ukusuka kuma-315°C 600 F kusenokubakho umoya opholileyo.

• Ukufudumeza

I-AISI 4340 intsimbi ye-alloy kufuneka ibe kwindawo yokushisa ephathwayo okanye iqheleke kwaye iphathwe ngubushushu ngaphambi kokufudumala. Ubushushu bobushushu buxhomekeke kwinqanaba lamandla elifunekayo. Kumanqanaba amandla kwi-260 - 280 ksi uluhlu lomsindo kwi-232 ° C (450 F). Ukomelela kwi-125 - 200 ksi uluhlu lomsindo kwi-510 ° C (950 F). Kwaye musa ukucaphuka i-4340 steels ukuba i-220 - 260 ksi amandla oluhlu njengoko ukuvutha kungabangela ukuthotywa kwempembelelo yokuchasana kweli nqanaba lamandla.

Ukufudumeza kufuneka kuphetshwe ukuba kunokwenzeka phakathi koluhlu lwama-250 °C ukuya kuma-450 °C ngenxa yobunzima bomsindo.

• Idangatye okanye Induction Ukuqina

Njengoko kukhankanyiwe ngasentla, imivalo yentsimbi ye-4340 eqinisiweyo ngaphambili kunye ne-4340 inokuthi iphinde iqiniswe ngakumbi ngedangatye okanye iindlela zokuqinisa i-induction ezikhokelela kwimeko yobunzima obungaphezu kwe-Rc 50. AISI 4340 iinxalenye zentsimbi kufuneka zitshiswe ngokukhawuleza kangangoko kunokwenzeka iqondo lobushushu be-austenitic (830 °C – 860 °C) kunye nobunzulu obufunekayo obulandelwa yi-oyile ekhawulezileyo okanye ukucinywa kwamanzi, ngokuxhomekeke kubulukhuni obufunekayo, ubungakanani besixhobo sokusebenza/ukumila kunye namalungiselelo okucima.

Ukulandela ukucima ukufudumala kwesandla, ukufudumeza kwi-150 ° C - 200 ° C kuya kunciphisa uxinzelelo kwimeko enempembelelo encinci kubulukhuni bayo.

Zonke izinto zomphezulu owenziwe nge-de-carburised kufuneka ziqale zisuswe ukuqinisekisa iziphumo ezingcono.

• Nitriding

Intsimbi ye-4340 eqiniweyo kunye ne-4340 i-alloy inokuthi ifakwe i-nitrided, inika ubunzima bomhlaba ukuya kuthi ga kwi-Rc 60. Ukushisa ukuya kwi-500 ° C - 530 ° C kwaye ubambe ixesha elaneleyo (ukusuka kwi-10 ukuya kwii-60 iiyure) ukuphuhlisa ubunzulu becala. I-Nitriding kufuneka ilandelwe kukupholisa okucothayo (akukho kucinywa) ukunciphisa ingxaki yokugqwetheka. Iimathiriyeli ze-nitrided grade 4340 ke ngoko zinokutshintshwa zibe kufutshane nobukhulu bokugqibela, kushiyeke isibonelelo esincinci sokusila kuphela. Amandla okuqina ombindi wesixhobo sentsimbi angama-4340 akasoloko echaphazeleka kuba ubushushu be-nitriding bungaphantsi kobushushu obusetyenzisiweyo.

Ubulukhuni bomphezulu obufikelelwa ngama-600 ukuya kuma-650HV.

7. Ubuchule

Ukumachina kwenziwa ngcono ngentsimbi ye-alloy 4340 kwindawo efakwe i-annealed or normalized and tempered condition. Iyakwazi ukucwangciswa ngokulula kuzo zonke iindlela eziqhelekileyo ezifana nokubona, ukujika, ukubhola njl njl. Nangona kunjalo kwiimeko zamandla aphezulu e-200 ksi okanye ngaphezulu ukucwangciswa kwe-machinability kuphela ukusuka kwi-25% ukuya kwi-10% ye-alloy kwi-anneal condition.

8. Ukuwelda

I-Welding yensimbi ye-4340 kwimeko enzima kunye neyomsindo (njengoko inikezelwa ngokuqhelekileyo), ayikhuthazwa kwaye kufuneka igwenywe ukuba kunokwenzeka, ngenxa yengozi yokucima ukucima, njengoko iimpawu zomatshini ziya kutshintshwa ngaphakathi kwendawo echaphazelekayo yokushisa kwe-weld.

Ukuba i-welding kufuneka yenziwe, shushubeza ukuya kuma-200 ukuya kuma-300°C kwaye uyigcine le nto ngelixa udibanisa. Ngokukhawuleza emva koxinzelelo lwe-welding khulula kwi-550 ukuya kwi-650 ° C, ngaphambi kokuqina kunye nokuvutha.

Ukuba ukuwelda kwimeko yokuqina kunye nobushushu kuyimfuneko ngokwenene, ngoko ke umsebenzi, ngoko nangoko ekupholiseni ukufudumala isandla, kufuneka ukuba uxinzelelo luthotywe nge-15 °C ngaphantsi kobushushu bokuqala.

9. Ukusetyenziswa kwe-4340 Steel

I-AISI 4340 yensimbi isetyenziswe kumacandelo amaninzi amashishini kwizicelo ezifuna i-tensile ephezulu / isivuno samandla ngaphezu kwe-4140 yensimbi inokubonelela.

Ezinye izicelo eziqhelekileyo ezifana nezi:

• Izixhobo zokuHlalisa iiNqwelo-moya
• Iimoto,
• Ukugrunjwa kwe-oyile negesi,
• Ukwenza,
• Ukubumba okufudumeleyo nokubandayo,
• Ukwakhiwa koomatshini,
• IiNkqubo zokuTshintshela, njengezixhobo zokuhambisa amandla kunye neeshafti.
• Imizi-mveliso yobunjineli ngokubanzi kunye nokusetyenziswa kokusetyenziswa kolwakhiwo, njengale: iishafti ezinzima, iigiya, ii-axles, ii-spindles, i-couplings, izikhonkwane, ii-chucks, iimolds njl.

I-Gnee Steel ngomnye wababoneleli abaphambili be-AISI 4340 yentsimbi kwisicelo sakho esahlukileyo njengoko kungasentla. Kwaye sinikezela ngentsimbi ye-4140, iintsimbi ezingama-4130 ngokunjalo. Qhagamshelana nam kwaye undazise izicelo zakho nangaliphi na ixesha.