Kugwiritsa Ntchito ndi Kusanthula kwa ASTM A1045 Structural Steel Pipe

Chitoliro Chachitsulo cha ASTM A1045nthawi zambiri amagwiritsidwa ntchito pazinthu zachitsulo chosasinthika chitoliro.Chitoliro chosasokonekera chachitsulo chagawidwa mu GB8162 ndi GB8163, zomwe ndi mfundo ziwiri zomwe zimagwiritsidwa ntchito ku China.Komabe, ASTM A1045Structural Steel Pipeali ndi GB8162 yokha, yomwe ndi zinthu zomwe zimagwiritsidwa ntchito popanga makina.

Chitoliro chachitsulo cha ASTM A1045 ndi chitoliro chachitsulo chomwe chimagwiritsidwa ntchito kawirikawiri chozimitsidwa komanso chotenthetsera chachitsulo chokhala ndi zida zabwino zamakina, kuuma kotsika komanso kosavuta kusweka pakuzimitsa madzi.Zigawo zing'onozing'ono ziyenera kuzimitsidwa ndi kutenthedwa, ndipo zigawo zazikulu ziyenera kukhala zokhazikika, zomwe zimagwiritsidwa ntchito kwambiri popanga zida zosuntha zamphamvu, monga turbine impeller ndi compressor piston.Shaft, giya, choyikapo, nyongolotsi, etc.

ASTM1045 mpweya zitsulo chitolirolili pafupifupi 0,45% mpweya, pang'ono manganese, pakachitsulo, etc., ndi otsika sulfure ndi phosphorous zili apamwamba mpweya structural zitsulo chitoliro.

Kutentha kutentha kutentha: normalizing 850, quenching 840, tempering 600. ASTM1045 zitsulo ndi apamwamba mpweya structural zitsulo ndi otsika kuuma ndipo n'zosavuta kudula.Nthawi zambiri nkhungu imagwiritsidwa ntchito ngati ma templates, zikhomo, zipilala zowongolera, ndi zina zambiri, koma ziyenera kutenthedwa.1. ASTM1045 zitsulo ndi zoyenerera ngati kuuma kwake kuli kwakukulu kuposa HRC55 (mpaka HRC62) pambuyo pozimitsa ndi musanapse.Kulimba kwapamwamba kwambiri pakugwiritsa ntchito ndi HRC55 (kuyezetsa kwambiri HRC58).2. Njira yopangira kutentha kwa carburizing ndi kuzimitsa singagwiritsidwe ntchito pazitsulo za ASTM1045.Zigawo zozimitsidwa ndi zowuma zimakhala ndi makina abwino ophatikizana ndipo zimagwiritsidwa ntchito kwambiri m'magawo osiyanasiyana ofunikira, makamaka ndodo zolumikizira, mabawuti, magiya ndi ma shaft omwe amagwira ntchito mosinthasintha.Komabe, kuuma kwapamtunda kumakhala kochepa ndipo sikutha kuvala.Kulimba kwa magawo kumatha kupitilizidwa ndikuzimitsa ndi kutenthetsa + pamwamba kuzimitsa.Chithandizo cha carburizing nthawi zambiri chimagwiritsidwa ntchito pazinthu zolemetsa zolemetsa zokhala ndi abrasion kukana komanso kukana koyambira, ndipo kukana kwake kwa abrasion ndikokwera kwambiri kuposa kuzimitsa ndi kutentha + pamwamba.Mpweya wake wapamwamba ndi 0.8-1.2%, ndipo pachimake chake nthawi zambiri ndi 0.1-0.25% (0.35% muzochitika zapadera).Pambuyo pa chithandizo cha kutentha, pamwamba pamakhala kuuma kwambiri (HRC58-62), ndipo pachimake chimakhala ndi kuuma kochepa komanso kukana mphamvu.Ngati chitsulo cha ASTM1045 chikugwiritsidwa ntchito posungira carburizing, martensite yolimba komanso yolimba imawonekera pachimake pambuyo pozimitsa, kutaya ubwino wa chithandizo cha carburizing.Pakadali pano, kaboni wazinthu zomwe zimagwiritsa ntchito carburizing siwokwera, ndipo mphamvu yayikulu imatha kufika pamwamba kwambiri ndi 0.30%, zomwe sizigwiritsidwa ntchito kawirikawiri.0.35% sanawonepo zitsanzo zilizonse, ndipo adangoziwonetsa m'mabuku ophunzirira.Njira yozimitsira ndikuwotcha + kuzimitsa kwapamwamba kwambiri kumatha kugwiritsidwa ntchito, ndipo kukana kuvala ndikoyipa pang'ono kuposa kubisala kwa carburizing.Njira yopangira kutentha kwazitsulo 45 zotchulidwa mu GB/T699-1999 muyezo ndi 850 ℃ normalizing, 840 ℃ quenching ndi 600 ℃ kutentha.Zomwe zakwaniritsidwa ndikuti mphamvu zokolola ndi ≥ 355MPa.Mphamvu yolimba ya chitsulo 45 yotchulidwa mu GB/T699-1999 muyezo ndi 600MPa, mphamvu zokolola ndi 355MPa, elongation ndi 16%, kuchepetsa dera ndi 40%, ndi mphamvu zowonongeka ndi 39J.