Round Steels (Round Bar Steel)

Classification by process
Simbi yakatenderedzwa inotsanangurwa seinopisa yakakungurutswa, yefodya uye inotonhora inodhonzwa.Kupisa kwakatenderedzwa simbi inosvika 5.5-250 mm muhukuru.Pakati pavo: 5.5-25 mm simbi diki yakatenderedza kazhinji kune mitsetse yakatwasuka mumasumbu ekupa, inowanzoshandiswa pakusimbisa mbariro, mabhaudhi uye akasiyana emakanika zvikamu;Simbi yakatenderedzwa yakakura kupfuura 25 mm, inonyanya kushandiswa mukugadzira zvikamu zvemuchina, seamless simbi pombi billet, nezvimwe.
Yakarongwa nemakemikari
Carbon simbi inogona kupatsanurwa kuita yakaderera kabhoni simbi, yepakati kabhoni simbi uye yakakwira kabhoni simbi zvinoenderana nemakemikari ayo (kureva kabhoni yemukati).
(1) Simbi yakapfava
Iyo inozivikanwawo sesimbi yakapfava, kabhoni yemukati kubva 0.10% kusvika 0.30% Yakaderera kabhoni simbi iri nyore kugashira akasiyana siyana ekugadzirisa senge forging, welding nekucheka, inowanzoshandiswa mukugadzira cheni, rivets, mabhaudhi, shafts, nezvimwe.
(2) Medium carbon steel
Carbon content 0.25% ~ 0.60% carbon steel.Kune sedative simbi, semi-sedative simbi, kufashaira simbi uye zvimwe zvigadzirwa.Kunze kwekabhoni, inewo zvishoma zvemanganese (0.70% ~ 1.20%).Zvinoenderana nemhando yechigadzirwa yakakamurwa kuita yakajairwa kabhoni structural simbi uye yakakwirira mhando kabhoni structural simbi.Kushanda kwakanaka kwekupisa uye kucheka kuita, kusashanda zvakanaka kwewelding.Simba uye kuoma kwakakwirira kudarika yakaderera kabhoni simbi, asi plastiki uye kuoma kwakaderera pane yakaderera kabhoni simbi.Zvinhu zvinopisa zvakatenderedzwa uye zvinotonhora zvinodhonzwa zvinogona kushandiswa zvakananga pasina kupisa kupisa kana mushure mekupisa kurapwa.Iyo yepakati kabhoni simbi mushure mekudzima uye kudziya ine yakanaka yakazara mechanicha zvinhu.Hukukutu hwepamusoro hwakawanikwa hunosvika HRC55(HB538), σb is 600 ~ 1100MPa.Saka mune yepakati simba nhanho yekushandiswa kwakasiyana-siyana, yepakati kabhoni simbi ndiyo inonyanya kushandiswa, mukuwedzera kune sechinhu chekuvakisa, asiwo huwandu hukuru hunoshandiswa mukugadzira zvikamu zvakasiyana-siyana zvemakanika.
(3) High carbon steel
Kazhinji inonzi simbi yemidziyo, iyo kabhoni yemukati inotangira pa0.60% kusvika 1.70% uye inogona kuomeswa nekudzikamiswa.Sando nemarango zvinogadzirwa nesimbi ine kabhoni inosvika 0.75%.Maturusi ekucheka akadai sechibhorani, tap, reamer, nezvimwe zvinogadzirwa kubva kusimbi ine kabhoni yemukati ye0.90% kusvika 1.00%.

Kurongwa nemhando yesimbi
Zvinoenderana nemhando yesimbi inogona kukamurwa kuita yakajairwa kabhoni simbi uye yakakwira mhando kabhoni simbi.
(1) Yakajairwa kabhoni structural simbi, inozivikanwawo seyakajairwa kabhoni simbi, ine miganho yakafara pane kabhoni yemukati, maitiro ekuita uye zvirimo zve phosphorus, sarufa uye zvimwe zvakasara zvinhu.MuChina nedzimwe nyika, yakakamurwa kuita zvikamu zvitatu zvinoenderana nemamiriro ekuvimbiswa kuendesa: Kirasi A simbi isimbi ine yakavimbiswa michina zvivakwa.Masimbi eKirasi B (Masimbi eKirasi B) masitadhi ane akavimbiswa kuumbwa kwemakemikari.Simbi dzakakosha (Masimbi eKirasi C) masimbi anovimbisa zvese zvemakanika zvivakwa uye kuumbwa kwemakemikari, uye anowanzo shandiswa mukugadzira zvimwe zvakakosha zvikamu zvezvimiro.China inogadzira uye inoshandisa yakanyanya A3 simbi (Kirasi A No.3 simbi) ine kabhoni inokwana inenge 0.20%, iyo inonyanya kushandiswa muzvivakwa zveinjiniya.
Imwe carbon structural simbi inowedzerawo trace aluminium kana niobium (kana zvimwe carbide kugadzira zvinhu) kugadzira nitride kana carbide zvidimbu, kuitira kudzikamisa kukura kwezviyo, kusimbisa simbi, kuchengetedza simbi.MuChina nedzimwe nyika, kuitira kuti isangane nezvinodiwa zvakakosha zvesimbi yehunyanzvi, chimiro chemakemikari uye zvimiro zveyakajairwa kabhoni structural simbi zvakagadziridzwa, nekudaro kugadzira nhevedzano yeyakajairwa kabhoni structural simbi kuti ishandiswe nehunyanzvi (senge zambuko, kuvaka, rebar, pressure mudziyo simbi, nezvimwewo).
(2) Zvichienzaniswa neyakajairwa kabhoni structural simbi, zvirimo zvesarufa, phosphorus uye zvimwe zvisiri-metallic inclusions mumhando yepamusoro kabhoni structural simbi yakaderera.Zvinoenderana nekabhoni yemukati uye kushandiswa kwakasiyana, iyi mhando yesimbi yakakamurwa kuita zvikamu zvitatu:
① Isingasviki 0.25% C yakaderera kabhoni simbi, kunyanya ine kabhoni isingasviki 0.10% ye08F,08Al, nekuda kwekunaka kwayo kwakadzika kudhirowa uye weldability uye inoshandiswa zvakanyanya seyakadzama yekudhirowa zvikamu zvakaita semota, magaba..... Etc. 20G ndicho chinhu chikuru kune akajairwa boilers.Pamusoro pezvo, simbi yakapfava inoshandiswawo zvakanyanya sesimbi yecarburizing, inoshandiswa mukugadzira michina.
②0.25 ~ 0.60% C isimbi yepakati kabhoni, inonyanya kushandiswa mumamiriro ekupisa, kugadzira zvikamu muindasitiri yekugadzira michina.
(3) Yakakwira kupfuura 0.6% C yakakwira kabhoni simbi, inonyanya kushandiswa mukugadzira zvitubu, magiya, rolls, nezvimwe.
Zvinoenderana neyakasiyana manganese emukati, inogona kukamurwa kuita zvakajairika manganese zvemukati (0.25 ~ 0.8%) uye yakakwira manganese yemukati (0.7 ~ 1.0% uye 0.9 ~ 1.2%) boka resimbi.Manganese inogona kuvandudza kuoma kwesimbi, kusimbisa ferrite, kuvandudza goho resimba, kusimba kwesimba uye kupfeka kuramba kwesimbi.Kazhinji, "Mn" inowedzerwa mushure megiredhi resimbi ine yakakwira manganese zvirimo, senge 15Mn uye 20Mn, kuti isiyanise kubva kune kabhoni simbi ine yakajairika manganese zvirimo.