Ibanga:20 Steel
Okujwayelekile:GB / T 699-1999

izici
Ukuqina kuphakeme kakhulu kunensimbi engu-15, akuvami ukuqeda, akukho qhwa eliqhakazile elibandayo elibandayo elibandayo eliphakeme kakhulu lokufaka amandla nokuqina kwe-welding, ukumelana nobukhulu obuncane, ukubukeka okuqinile noma Ukwakheka kwezingxenye eziyinkimbinkimbi okuthambekele ekuqhekekeni kwesimo semishini yokusika kwesimo sokudonswa okubandayo noma okujwayelekile isimo esihle kakhulu esisetshenziswa ekukhiqizeni amandla akusona nobunzima obukhulu
Insimbi ingeyakwekhwalithi ephezulu ye-carbon carbon, insimbi yokuqothula ebandayo, i-steelness inamandla aphansi, ubulukhuni obuhle, ukufudumala kanye nokushaywa kwe-weldurall, isilinganiso se-355-500, isilinganiso sama-24%
Ukwenza okujwayelekile kungakhuthaza ukuguquguquka kwensimbi, lungisa i-proeutectoid enkulu ye-block proeutetectoid, futhi uthuthukise ukusebenza kwezikhala ngaphansi kwama-160hbs
Indlela yezobuchwepheshe yeinsimbiIzingxenye zokufa ngukuthi: Ukuphoqelela Ukuphoqelelwa Ukufa Okungenalutho Kwemishini Ukuvusa Imishini Ebandayo Ukubumba Ukubumba Ukubumba Ukubumba kabusha Imishini Emishini Yokuqothula Imishini yokugaya

Ukwakheka kwamakhemikhali
C: 0.17% ~ 0.24%
SI: 0.17% ~ 0.37%
MN: 0.35% ~ 0.65%
S: 0.035%
P: 0.035%
CR: 0.25%
NI: 0.25%
CU: 0.25
impahla yemishini
Amandla we-Tensile B (MPA): ≥410 (42)
Ukukhiqiza amandla s (MPA): ≥245 (25)
I-Elongation 5 (%): ≥25
Ukuncishiswa kwe-area bits (%): 55 noma ngaphezulu
Ubulukhuni: Hhayi Ukushisa Kwelashwa, ≤156HB
Usayizi wesampula: Usayizi wesampula: 25mm

Olunye Ulwazi

Ukucaciswa Kokwelashwa Okushisa: Ukujwayelekile, 910 ℃, ukupholisa komoya.

Isakhiwo seMetallographic: Ferrite + Pearlite.
Ukwelashwa okushisayensimbi 20 futhi ucime kanzima in thren yensimbi cha. 20:
Ukwelashwa kokushisa kwensimbi engama-20: ngensimbi engu-20, kungenzeka ukufeza ubulukhuni obujwayelekile bokucimaka okungu-30-35hrc.nges Ukushisa okushisa kuphezulu, ukuguqulwa okuqediwe kukhulu:
1. Ngemuva kwemishini evuthayo, umsebenzi we-workpiece ucinyiswe yiwo wonke umuthi wokushisa (920 ℃ aqede brine), bese ecubungulwa.Ukuhlelwa izidingo zobulukhuni ze-30-35hrc, zonke izinqubo kufanele zikwazi ukucubungula, akukho lutho olungaphezu kokuhle ngaphakathi nangaphandle kombuthano wemoto, ukulungiswa kokhiye.
2. Imishini efanayo emishini, indawo yangaphakathi ye-hole eqeda noma itafula elicijile kuphela ukhiye (kuya ngosayizi womsebenzi wokusebenza), futhi ekugcineni uqede.
3. Ukuzikhandla nokucisha, ukugaya umgodi wangaphakathi nokhiye.
Ukugeleza kwenqubo kungokwesibili, okwesithathu kanye nokuningi.
● Ukulethwa Kwezwe: Ukulethwa esimweni sokungabikho ukwelashwa okushisa noma ukwelashwa okushisa (okuvuselelayo, okujwayelekile noma okushisa okuphezulu noma ukulethwa esimweni sokwelashwa okushisa kuzokhonjiswa kwinkontileka. Uma kungabonisiwe, ukulethwa kuzokwenziwa ngaphandleukwelashwa okushisa.