I-AISI 4340 Steel 36CrNiMo4 1.6511 EN24 817M40 SNCM439

I-AISI 4340insimbiiyikhabhoni emaphakathi, insimbi eyingxubevange ephansi eyaziwa ngokuqina namandla ayo ezigabeni ezinkulu ngokuqhathaniswa. I-AISI 4340 nayo iwuhlobo olulodwa lwezinsimbi ze-nickel chromium molybdenum. Insimbi engu-4340 alloy ngokuvamile inikezwa iqinile futhi iqinisiwe kububanzi obuqinile obungu-930 - 1080 Mpa. Izinsimbi ezingama-4340 eziqiniswe ngaphambili neziqinile zingaqiniswa ngaphezulu yilangabi noma ukuqina kokungeniswa kanye ne-nitriding. I-4340 steel inokushaqeka okuhle kanye nokumelana nomthelela kanye nokumelana nokuguga nokuhuzuka esimweni esiqinile. Izakhiwo zensimbi ze-AISI 4340 zinikeza i-ductility enhle esimweni se-anneal, esivumela ukuthi igotshwe noma yakheke. I-Fusion kanye ne-resistance welding nayo ingenzeka ngensimbi yethu engu-4340 alloy. Izinto ze-ASTM 4340 zivame ukusetshenziswa lapho ezinye izinsimbi ze-alloy zingenakho ukuqina ukuze zinikeze amandla adingekayo. Ezingxenyeni ezigcizelelwe kakhulu kuyisinqumo esihle kakhulu. I-AISI 4340 i-alloy steel ingenziwa futhi ngazo zonke izindlela ezivamile.

Ngenxa yokutholakala kwensimbi yezinga le-ASTM 4340 ivamise ukushintshwa ngezindinganiso zase-Europe 817M40/EN24 kanye ne-1.6511/36CrNiMo4 noma i-Japan based SNCM439 steel. Unemininingwane enemininingwane yensimbi engu-4340 ngezansi.

1. I-AISI Alloy 4340 Steel Supply Range

4340 Steel Round Bar: ububanzi 8mm – 3000mm (*I-Dia30-240mm esitokweni isesimweni esifakiwe, ukuthunyelwa ngokushesha)

I-4340 Steel Plate: ukujiya 10mm - 1500mm x ububanzi 200mm - 3000mm

I-4340 Steel Grade Square: 20mm - 500mm

I-Surface Qeda: Okumnyama, Okumahhadlahhadla, Okuphendukile noma ngokwezidingo ezinikeziwe.

2. I-AISI 4340 Ukucaciswa Kwensimbi kanye Namazinga Afanele

3. I-ASTM 4340 Izinsimbi Nokulingana Kwamakhemikhali

4. I-AISI Alloy 4340 Steel Mechanical Properties

Izakhiwo ezishisayo

5. Ukwenziwa kwe-4340 Alloy Steel

Hlangisa insimbi ngo-4340 kuqala, shisa kuze kufike ku-1150 ° C - 1200 ° C ubukhulu bokwenza, ubambe kuze kube yilapho izinga lokushisa lifana nengxenye yonke.

Ungafoji ngaphansi kuka-850 °C. I-4340 inezici ezinhle zokukhanga kodwa kufanele kuqashelwe lapho ipholisa njengoba insimbi ikhombisa ukuthi isengozini yokuqhekeka. Ngemuva kokusebenza kokubumba, ucezu lomsebenzi kufanele lupholiswe kancane ngangokunokwenzeka. Futhi ukupholisa esihlabathini noma i-lime eyomile kuyanconywa njll.

6. AISI 4340 Steel Grade Heat Treatment

• Ukunciphisa Ingcindezi

Ukuze unciphise ukucindezeleka kwensimbi eqiniswe ngaphambili kufinyelelwa ngokushisisa insimbi engu-4340 iye phakathi kuka-500 kuya ku-550°C. Shisisa ufike ku-600 °C - 650 °C, ubambe kuze kube yilapho izinga lokushisa lilingana endaweni yonke, cwilisa ihora elingu-1 engxenyeni engu-25 mm, futhi uphole emoyeni onganyakazi.

• Anealing

Ukupholisa okugcwele kungenziwa ku-844°C (1550 F) kulandelwe ukupholisa okulawulwayo (isithando somlilo) ngenani elingasheshi ukudlula u-10°C (50 F) ngehora kuze kufike ku-315°C (600 F). Ukusuka ku-315°C 600 F kungase kupholiswe umoya.

• Ukuthukuthela

I-AISI 4340 ingxubevange yensimbi kufanele ibe sesimweni sokushisa noma ijwayele futhi iphathwe ngokushisa ngaphambi kokushisa. Izinga lokushisa lokushisa lincike ezingeni lamandla elifunekayo. Ngamaleveli wamandla ku-260 – 280 ksi range temper ku-232°C (450 F). Ukuze uthole amandla ebangeni le-125 – 200 ksi temper ku-510°C (950 F). Futhi ungazithukuthelisi izinsimbi ezingu-4340 uma ziku-220 - 260 ksi ububanzi bamandla njengoba ukufudumala kungase kubangele ukuwohloka komthelela wokumelana naleli zinga lamandla.

Ukushisa kufanele kugwenywe uma kungenzeka phakathi kwebanga elingu-250 °C - 450 °C ngenxa yokufutheka kwentukuthelo.

• Flame noma Induction Harding

Njengoba kushiwo ngenhla, izinsimbi zensimbi ezingu-4340 eziqiniswe ngaphambili futhi ezishisiwe zingaqiniswa ngokuqhubekayo ngelangabi noma izindlela zokuqinisa induction okuholela ekubeni ikesi libe lukhuni ngaphezu kuka-Rc 50. Izingxenye zensimbi ze-AISI 4340 kufanele zishiswe ngokushesha ngangokunokwenzeka ukuze izinga lokushisa le-austenitic (830 °C – 860 °C) kanye nokujula kwekesi elidingekayo okulandelwa uwoyela osheshayo noma ukucisha amanzi, kuye ngobulukhuni obudingekayo, usayizi wengcezu yokusebenza/umumo kanye nezinhlelo zokucisha.

Ukulandela ukucisha ukuze kufudumale isandla, ukushisa ku-150°C – 200°C kuzonciphisa ukucindezelwa esimweni esinomthelela omncane ebulukhunini baso.

Zonke izinto ezingaphezulu kwe-de-carburised kumele ziqale zisuswe ukuze kuqinisekiswe imiphumela engcono kakhulu.

• I-Nitriding

Insimbi eqinile ye-4340 alloy nayo ingafakwa i-nitrided, inikeze ubulukhuni obungaphezulu obufika ku-Rc 60. Shisisa ukuya ku-500°C - 530°C futhi ubambe isikhathi esanele (kusuka ku-10 kuya kumahora angu-60) ukuthuthukisa ukujula kwekesi. I-Nitriding kufanele ilandelwe ukupholisa kancane (akukho ukucisha) okunciphisa inkinga yokuhlanekezela. Ngakho-ke izinto ezisetshenziswayo ze-nitrided grade 4340 zingashintshwa zibe usayizi wokugcina, kusale imali encane yokugaya kuphela. Amandla aqinile we-4340 steel core ngokuvamile awathinteki njengoba izinga lokushisa le-nitriding ngokuvamile lingaphansi kwezinga lokushisa lokuqala elisetshenziswayo.

Ubulukhuni bobuso obufinyelelekayo bungu-600 kuya ku-650HV.

7. Ukusebenziseka

Ukumayinisa kwenziwa kahle kakhulu nge-alloy steel 4340 esimweni esishubile noma esijwayelekile nesipholile. Ingenziwa kalula ngomshini ngazo zonke izindlela ezivamile ezifana nokusaha, ukujika, ukubhoboza njll. Kodwa-ke ezimweni zamandla aphezulu angama-200 ksi noma ngaphezulu amandla okusebenza asuka ku-25% kuya ku-10% kuphela we-alloy esesimweni sokucwiliswa.

8. Ukushisela

Ukushiselwa kwensimbi 4340 esimweni esiqinile nesithambile (njengoba kuvame ukunikezwa), akunconywa futhi kufanele kugwenywe uma kungenzeka, ngenxa yengozi yokucisha ukuqhekeka, njengoba izakhiwo zemishini zizoshintshwa ngaphakathi kwendawo ethintekile ukushisa kwe-weld.

Uma ukushisela kufanele kwenziwe, shisa kusengaphambili ku-200 ukuya ku-300°C futhi ukugcine lokhu ngenkathi ushisela. Ngokushesha ngemva kokushisela ukucindezeleka kukhulula ku-550 kuya ku-650 ° C, ngaphambi kokuqina kanye nokushisa.

Uma ukushisela esimweni esiqinile nesiqinile kudingekile ngempela, khona-ke ucezu lomsebenzi, ngokushesha lapho lupholisa ukuze lufudumale, kufanele lukhululeke ukucindezeleka ngo-15 °C ngaphansi kwezinga lokushisa lokuqala.

9. Ukusetshenziswa kwe-4340 Steel

Insimbi ye-AISI 4340 isetshenziswa emikhakheni eminingi yezimboni ngezinhlelo zokusebenza ezidinga amandla aphezulu we-tensile/isivuno kunensimbi engu-4140 enganikeza.

Ezinye izinhlelo zokusebenza ezijwayelekile ezifana nalezi:

• I-Aircraft Landing Gear
• Ezezimoto,
• Ukumba Uwoyela Negesi,
• Ukuqamba,
• Ukwakheka Okufudumele Nokubandayo,
• Ukwakhiwa komshini,
• Amasistimu okudlulisa, njengamagiya okudlulisa amandla namashafti.
• Izimboni ezijwayelekile zobunjiniyela kanye nezinhlelo zokusebenza zokusetshenziswa kwesakhiwo, njengalezi: izinsimbi ezisindayo, amagiya, ama-ekseli, ama-spindle, ama-couplings, amaphini, ama-chucks, isikhunta njll.

I-Gnee Steel ingomunye wabahlinzeki abahamba phambili be-AISI 4340 yensimbi yohlelo lwakho lokusebenza oluhlukile njengenhla. Futhi sinikezela ngensimbi engu-4140, izinsimbi ezingama-4130 futhi. Ngithinte futhi ungazise izicelo zakho noma nini.