Ipuleti lensimbi le-S460N/Z35 elilungisa imvelo, ipuleti laseYurophu elinamandla aphezulu, iphrofayili yensimbi ye-S460N, S460NL, S460N-Z35: I-S460N, S460NL, S460N-Z35 iyinsimbi yokusanhlamvu eshisiwe eshisiwe eshisayo ngaphansi kwesimo esijwayelekile/esijwayelekile sokugoqa, ubukhulu bepuleti lensimbi le-S460 elisezingeni elingaphezu kuka-200mm.
I-S275 yensimbi yesakhiwo esingeyona i-alloy standard: EN10025-3, inombolo: 1.8901 Igama lensimbi liqukethe izingxenye ezilandelayo: Uhlamvu lwesibonakaliso S: ukuqina okuhlobene nensimbi yesakhiwo okungaphansi kuka-16mm inani lamandla okukhiqiza: inani eliphansi lokukhiqiza Izimo zokulethwa: N icacisa ukuthi umthelela ekushiseni okungengaphansi kwama-degrees angu--50 umelelwa uhlamvu olukhulu L.
S460N, S460NL, S460N-Z35 Ubukhulu, ukuma, isisindo kanye nokuphambuka okuvumelekile.
Usayizi, ukuma kanye nokuphambuka okuvumelekile kwepuleti lensimbi kufanele kuhambisane nezinhlinzeko ze-EN10025-1 ngo-2004.
Isimo sokulethwa se-S460N, S460NL, S460N-Z35 Amapuleti ensimbi avame ukulethwa esesimweni esijwayelekile noma ngokugoqwa okuvamile ngaphansi kwezimo ezifanayo.
I-S460N, S460NL, S460N-Z35 Ukwakheka Kwamakhemikhali kwensimbi ye-S460N, S460NL, S460N-Z35 Ukwakheka kwamakhemikhali (ukuhlaziywa kokuncibilika) kufanele kuhambisane nethebula elilandelayo (%).
Izidingo zokwakheka kwamakhemikhali ze-S460N, S460NL, S460N-Z35: Nb+Ti+V≤0.26; Cr+Mo≤0.38 S460N Ukuhlaziywa Kokuncibilika Kwe-Carbon Equivalent (CEV).
I-S460N, S460NL, S460N-Z35 Izakhiwo zemishini Izakhiwo zemishini kanye nezakhiwo zenqubo ze-S460N, S460NL, S460N-Z35 kufanele zihlangabezane nezidingo zethebula elilandelayo: Izakhiwo zemishini ze-S460N (ezifanele ukuwela).
Amandla okushaya e-S460N, S460NL, S460N-Z35 esimweni esijwayelekile.
Ngemva kokufakwa kanye nokulungiswa, insimbi yekhabhoni ingathola isakhiwo esilinganiselwe noma esicishe sibe nesilinganiso, futhi ngemva kokucima, ingathola isakhiwo esingesilingani. Ngakho-ke, lapho kufundwa isakhiwo ngemva kokwelashwa kokushisa, akufanele kubhekwe kuphela umdwebo wesigaba sekhabhoni yensimbi kodwa futhi nejika lokuguqulwa kwe-isothermal (ijika C) lensimbi.
Umdwebo wesigaba sekhabhoni yensimbi ungabonisa inqubo yokwenza i-alloy ikhanye kancane, isakhiwo ekushiseni kwegumbi kanye nenani elilinganiselwe lezigaba, kanti i-C curve ingabonisa isakhiwo sensimbi enokwakheka okuthile ngaphansi kwezimo zokupholisa ezahlukene. I-C curve ifanele izimo zokupholisa ezishintshashintshayo; I-CCT curve (i-austenitic continuous cooling curve) iyasebenza ezimweni zokupholisa okuqhubekayo. Ngezinga elithile, i-C curve ingasetshenziswa futhi ukulinganisa ushintsho lwesakhiwo esincane ngesikhathi sokupholisa okuqhubekayo.
Uma i-austenite ipholiswa kancane (okulingana nokupholisa kwesithando somlilo, njengoba kuboniswe ku-Fig. 2 V1), imikhiqizo yokuguqulwa iseduze nesakhiwo sokulingana, okungukuthi i-pearlite ne-ferrite. Ngokwanda kwesilinganiso sokupholisa, okungukuthi, lapho i-V3>V2>V1, ukupholisa okunganele kwe-austenite kuyanda kancane kancane, futhi inani le-ferrite epholisiwe liyancipha kancane kancane, kuyilapho inani le-pearlite likhula kancane kancane, futhi isakhiwo siba sincane kakhulu. Ngalesi sikhathi, inani elincane le-ferrite epholisiwe lisakazwa kakhulu emngceleni wokusanhlamvu.
Ngakho-ke, isakhiwo se-v1 yi-ferrite+pearlite; isakhiwo se-v2 yi-ferrite+sorbite; isakhiwo esincane se-v3 yi-ferrite+troostite.
Uma izinga lokupholisa lingu-v4, inani elincane le-ferrite ne-troostite (ngezinye izikhathi inani elincane le-bainite lingabonakala) liyavuthuluka, kanti i-austenite iguqulwa kakhulu ibe yi-martensite ne-troostite; Uma izinga lokupholisa lingu-v5 lidlula izinga lokupholisa elibalulekile, insimbi iguqulwa ngokuphelele ibe yi-martensite.
Ukuguqulwa kwensimbi ye-hypereutectoid kufana nokwensimbi ye-hypoeutectoid, umehluko ukuthi i-ferrite iqalela endaweni yokugcina kanye ne-cementite iqalela endaweni yokuqala.
Isikhathi sokuthunyelwe: Disemba 14-2022
