Ukwakheka kwamakhemikhali

I-Gr.3: Okuqukethwe kwekhabhoni ≤0.19%, okuqukethwe kwe-silicon 0.18% -0.37%, okuqukethwe kwe-manganese 0.31% -0.64%, okuqukethwe kwe-phosphorus nesibabule ≤0.025%, futhi iqukethe u-3.18% -3.82% we-nickel.

I-Gr.6: Okuqukethwe kwekhabhoni ≤0.30%, okuqukethwe kwe-silicon ≥0.10%, okuqukethwe kwe-manganese 0.29% -1.06%, okuqukethwe kwe-phosphorus nesibabule Konke ≤0.025%.

Izakhiwo zemishini

I-Gr.3: amandla aqinile ≥450MPa, amandla esivuno ≥240MPa, ubude ≥30% ngobude, ≥20% ngokuphambene, izinga lokushisa lokuhlola umthelela ophansi ngu-150°F (-100°C).

I-Gr.6: amandla aqinile ≥415MPa, amandla esivuno ≥240MPa, ubude ≥30% ngobude, ≥16.5% ngokuphambene, izinga lokushisa lokuhlola umthelela ophansi ngu-50°F (-45°C).

Inqubo yokukhiqiza

Ukuncibilikisa: Sebenzisa isithando somlilo sikagesi noma isiguquli kanye nezinye izinto zokusebenza ukuze ukhiphe i-oxidize, ususe i-slag kanye ne-alloy yensimbi encibilikisiwe ukuze uthole insimbi Ehlanzekile encibilikisiwe.

Ukugingqika: Jova insimbi encibilikisiwe emshinini wokugaya ukuze ugingqike, kancane kancane wehlise ububanzi beshubhu futhi uthole ukujiya kodonga oludingekayo, ngesikhathi esifanayo, bushelelezi ishubhu lensimbi.

Ukucubungula okubandayo: Ngokucubungula okubandayo okufana nokudweba okubandayo noma ukugoqa okubandayo, ukunemba kanye nekhwalithi yangaphezulu yeshubhu lensimbi ingathuthukiswa.

Ukwelashwa kokushisa: Ngokujwayelekile, kulethwa esimweni esijwayelekile noma esijwayelekile futhi esishisayo ukuze kuqedwe ingcindezi esele ngaphakathi kweshubhu lensimbi futhi kuthuthukiswe ukusebenza kwayo okuphelele.

Inkambu yohlelo lokusebenza

I-Petrochemical: Isetshenziselwa ukukhiqiza amapayipi emikhumbi enengcindezi ephansi yezinga lokushisa eliphansi kanye namapayipi okushintshanisa ukushisa okunezinga lokushisa eliphansi emikhakheni ye-petroleum, imboni yamakhemikhali, njll., engahlangabezana nezidingo zokusetshenziswa ezindaweni ezinezinga lokushisa eliphansi, njengegesi yemvelo ewuketshezi oluwuketshezi lwamathangi okugcina igesi yemvelo, amapayipi okudlulisa izinga lokushisa eliphansi, njll.

Igesi yemvelo: Ifanele amapayipi okuhambisa igesi yemvelo kanye namathangi okugcina igesi nezinye izinto zokusebenza ukuze kuqinisekiswe ukusebenza okuphephile endaweni enezinga lokushisa eliphansi.

Eminye imikhakha: Ibuye isetshenziswe emandleni, emkhathini nasekwakheni imikhumbi, njengezinto eziyinhloko zesakhiwo sama-condensers, ama-boilers nezinye izinto zokusebenza kumishini yamandla, kanye nezinto eziyinhloko zesakhiwo sezinhlelo ze-hydraulic, amasistimu kaphethiloli kanye nezinye izinto zokusebenza emkhakheni we-aerospace.

Imininingwane kanye nobukhulu

Ukucaciswa okujwayelekile nobukhulu kunobubanzi obubanzi, obufana nobubanzi obungaphandle obungu-21.3-711mm, ukujiya kodonga 2-120mm, njll.
Gr.6 ipayipi lensimbi engenamthungo, ikakhulukazi i-ASTM A333/A333M GR.6 noma i-SA-333/SA333M GR.6ipayipi lensimbi elingenamthungo eliphansi lokushisa eliphansi, liyinto ebalulekile yezimboni, esetshenziswa kabanzi ezikhathini ezihlukahlukene ezidinga ukuqina kwezinga lokushisa eliphansi namandla aphezulu. Okulandelayo yisingeniso esiningiliziwe sepayipi lensimbi elingenamthungo le-Gr.6:

1. Amazinga wokusebenzisa nezinto zokwakha

Amazinga okusetshenziswa: Gr.6 ipayipi lensimbi engenamthungo lisebenzisa i-ASTM A333/A333M noma amazinga e-ASME SA-333/SA333M, akhishwa i-American Society for Testing and Materials (ASTM) kanye ne-American Society of Mechanical Engineers (ASME) futhi asetshenziswa ngokukhethekile ukuze ucacise izidingo zobuchwepheshe zamapayipi ensimbi angenazihibe.

Okubalulekile: Ipayipi lensimbi elingenamthungo le-Gr.6 ipayipi lensimbi elinethempelesha eliphansi elingenanikeli, esebenzisa insimbi eqinile ye-aluminium-deoxidized fine-grained low-temperature, eyaziwa nangokuthi i-aluminium-killed steel. Isakhiwo sayo se-metallographic yi-cubic ferrite egxile emzimbeni.

2. Ukwakheka kwamakhemikhali

Ukwakheka kwamakhemikhali kwepayipi lensimbi elingenamthungo le-Gr.6 kufaka phakathi:

Ikhabhoni (C): Okuqukethwe kuphansi, ngokuvamile akudluli ku-0.30%, okusiza ukwehlisa ukonakala kwensimbi.

I-Manganese (Mn): Okuqukethwe kuphakathi kuka-0.29% no-1.06%, okungathuthukisa amandla nokuqina kwensimbi.

I-Silicon (Si): Okuqukethwe kuphakathi kuka-0.10% no-0.37%, okusiza inqubo ye-deoxidation yensimbi futhi ingathuthukisa amandla ensimbi ngezinga elithile.

I-Phosphorus (P) nesibabule (S): Njengezakhi zokungcola, okuqukethwe kwazo kunqunyelwe ngokuqinile, ngokuvamile akudluli ku-0.025%, ngoba okuqukethwe okuphezulu kwe-phosphorus nesibabule kuzonciphisa ukuqina nokushisela kwensimbi.

Ezinye izakhi ze-alloying: njenge-chromium (Cr), i-nickel (Ni), i-molybdenum (Mo), njll., okuqukethwe kwakho kulawulwa ezingeni eliphansi ukuze kuqinisekiswe ukusebenza kwezinga lokushisa eliphansi nokusebenza okuphelele kwensimbi.

3. Izakhiwo zemishini

Ipayipi lensimbi elingenamthungo le-Gr.6 linezakhiwo ezinhle kakhulu zemishini, ikakhulukazi ezihlanganisa:

Amandla okuqina: Ngokuvamile phakathi kuka-415 no-655 MPa, okuqinisekisa ukuthi ipayipi lensimbi lingakwazi ukugcina ubuqotho besakhiwo futhi livimbele ukuphuka lapho lingaphansi kwengcindezi.

Amandla okukhiqiza: Inani elincane limayelana ne-240 MPa (lingakwazi futhi ukufinyelela ngaphezu kwama-MPa angu-200), ukuze lingakhiqizi ukuguqulwa ngokweqile ngaphansi kwamandla athile angaphandle.

Ukwelula: hhayi ngaphansi kuka-30%, okusho ukuthi ipayipi lensimbi linekhono elihle lokuguquguquka kwepulasitiki futhi lingakhiqiza ukuguquguquka okuthile ngaphandle kokuphuka lapho lelulwa ngamandla angaphandle. Lokhu kubaluleke kakhulu ukuze kusetshenziswe ezindaweni zokushisa eziphansi, ngoba izinga lokushisa eliphansi lingase lenze izinto zibe brittle, futhi ipulasitiki enhle inganciphisa ubungozi bokuthi i-embrittlement enjalo.

Ukuqina komthelela: Ezingeni lokushisa elishiwo eliphansi (elifana -45°C), amandla omthelela kufanele ahlangabezane nezimfuneko ezithile zezinombolo ngokuqinisekiswa kokuhlolwa komthelela we-Charpy ukuze kuqinisekiswe ukuthi ipayipi lensimbi ngeke liqhekeke ngaphansi komthelela ophansi wezinga lokushisa.