I-Q345B i-square-diameter ye-square ye-square-diameter ye-square ye-square ye-square yimveliso yensimbi ende enecandelo elingenanto kwaye ingabikho i-seams, eyenziwe ngombhobho wensimbi ongenamthungo njengento esisiseko ngokuqengqeleka okanye umzobo obandayo. Xa kuthelekiswa nezinto eziqinileyo zentsimbi ezifana nentsimbi engqukuva, imibhobho yentsimbi engenamthungo emikhulu enobubanzi ilula ngobunzima xa ukugoba kunye namandla okugoba kuyafana. Ziyintsimbi ye-cross-section yezoqoqosho kwaye zisetyenziswa ngokubanzi kwimizila yezakhiwo kunye neengxenye zemishini.

I-Q345B imibhobho yentsimbi engenamthungo enkulu enobubanzi obungenamthungo inokohlulwa ibe yimibhobho yentsimbi yesikwere kunye nemibhobho yentsimbi enokwakheka okukhethekileyo ngokwemilo eyahlukeneyo yendawo enqamlezileyo. Xa i-cross-section ye-circular iphantsi koxinzelelo lwe-radial yangaphakathi okanye yangaphandle, amandla alingana. Ngoko ke, uninzi lwemibhobho yensimbi yimibhobho ejikelezayo. Nangona kunjalo, imibhobho ejikelezayo nayo inemida ethile. Ngokomzekelo, phantsi kwemeko yokugoba kwendiza, umbhobho ojikelezayo uya kuba namandla njengemibhobho yentsimbi engenamthungo kunye nemibhobho yoxande kumandla okugoba. Imibhobho yesikwere kunye noxande iqhele ukusetyenziswa kwezinye izakhelo zoomatshini bezolimo, intsimbi kunye nefenitshala yomthi, njl njl

Zeziphi iingenelo ze-Q345B umbhobho wensimbi omkhulu ububanzi?
1. Umphezulu we-Q345B we-square-diameter ye-square umbhobho wensimbi unobude obude kwaye unonyango oluchasayo kunye ne-rust. Isantya se-oxidation asiyi kukhawuleza kwaye i-rust emhlophe ayiyi kubumba kwipayipi yensimbi yesikwere.
2. Inezakhiwo ezichasene ne-corrosion kunye ne-wear-resistant-resistant, okwenza umbhobho wensimbi ongenamthungo unobomi obude benkonzo.
3. Imibhobho yentsimbi engenamthungo ikhuselwe. Emva kokufudumeza, i-galvanizing eshushu-dip yenziwa kwindawo nganye yombhobho wensimbi ongenamthungo, kwaye izikhundla ze-convex kunye ne-concave zikhuselwe.
4. Ngenxa yokuba umbhobho wensimbi ongenamthungo ushushu-ukudipha i-galvanized ngaphandle, ugcina ixesha lokupeyinta okanye ukuxubha, okwenza ukwakhiwa kube lula.
5. Imibhobho yentsimbi enezitshizi eshushu-dip ayiyi kuba ngumkhenkce okanye iphuke kwangeentsuku ezingama-39, nto leyo eyenza ukuba ifaneleke kakhulu kwimimandla esemantla.

Ngethuba lokuvunywa kweprojekthi ye-Q345B i-square-diameter ye-square yensimbi yombhobho, kubalulekile ukunyamekela ukuhambelana kweembombo ezine, kwaye ukuphambuka kwamacala amane kuphakathi komgangatho wesizwe. Umgangatho kazwelonke wokutshintshwa kwe-square engenamthungo kunye nemibhobho yoxande ngokuqhelekileyo: GB/T3094-2008, kwaye kusekho kulo mgangatho. Impazamo ye-dimensional ye-engile engu-R ilungisiwe. Umbhobho wensimbi okhanyayo unamandla ngakumbi kunombhobho wentsimbi oqondileyo we-square we-square ngokwemiqathango yoxinzelelo. Ixabiso lombhobho wentsimbi yesikwere esikhanyayo ubuncinci kakhulu. Umbhobho wentsimbi eqaqambileyo uya kuba neziphelo zombhobho ngexesha lokucubungula. Kwimeko yomsila osicaba, ukukhetha umsila ngumlinganiselo owongezelelweyo.

Kutheni le nto i-Q345B i-square-diameter ye-square imibhobho yentsimbi kufuneka ihanjiswe? Esona sizathu siphambili kukuphucula umgangatho we-Q345B wemibhobho yentsimbi enobubanzi obukhulu, kuquka:
(1) Ngokumalunga ne-carbon steel high kunye ne-alloy steel high, ukucima kunokuphuhlisa amandla ayo ukuphucula ukuqhutyelwa.
(2) Ngokubhekiselele kwintsimbi ephantsi kwekhabhoni, ukucima kunokutshintsha unyango lobushushu ukulungiselela ukucima i-induction kunokunciphisa ukuguqulwa kwemibhobho engenamthungo kunye nokunciphisa iindleko zokuvelisa.
(3) Ngokuphathelele i-high-carbon steel, ukucima kunokususa isakhiwo sothungelwano lokusabalalisa i-cementite, enenzuzo kwi-spheroidizing annealing.
(4) Kwimibhobho emikhulu kunye nobukhulu obuphakathi obungenamthungo okanye ukufakwa kwentsimbi kunye namacandelo atshintshileyo kakhulu, ukucima kungasetyenziselwa endaweni yonyango lobushushu ukunciphisa utyekelo lokuguqulwa kunye nokuqhekeka okanye ukulungiselela unyango lobushushu.
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(6) Isetyenziswe kwi-aluminium die castings ukunyusa umxholo we-ferrite oqhelekileyo kunye nokuphucula amandla kunye nokumelana nokunxiba kwe-castings.