Mapaipi achitsulo ozungulira a ASTM A139 S235 J0
Chimodzi mwa zabwino zazikulu zaChitoliro chachitsulo chozungulira cha S235 J0ndi kusinthasintha kwake m'mimba mwake ndi makulidwe a khoma. Izi zimathandiza kuti pakhale kusinthasintha kwakukulu pakupanga, makamaka popanga mapaipi okhala ndi makoma akuluakulu komanso okhuthala. Kuphatikiza apo, ukadaulowu ndi wothandiza kwambiri popanga mapaipi okhala ndi makoma okhuthala ang'onoang'ono ndi apakatikati, zomwe zimapangitsa kuti zinthu ziyende bwino kuposa njira zina zomwe zilipo kale.
Katundu wa Makina
| kalasi yachitsulo | mphamvu yocheperako yopezera phindu Mpa | Kulimba kwamakokedwe | Kutalikirana kochepa % | Mphamvu yochepa kwambiri J | ||||
| Kunenepa kotchulidwa mm | Kunenepa kotchulidwa mm | Kunenepa kotchulidwa mm | kutentha koyesedwa kwa | |||||
| 16 | >16≤40 | <3 | ≥3≤40 | ≤40 | -20℃ | 0℃ | 20℃ | |
| S235JRH | 235 | 225 | 360-510 | 360-510 | 24 | - | - | 27 |
| S275J0H | 275 | 265 | 430-580 | 410-560 | 20 | - | 27 | - |
| S275J2H | 27 | - | - | |||||
| S355J0H | 365 | 345 | 510-680 | 470-630 | 20 | - | 27 | - |
| S355J2H | 27 | - | - | |||||
| S355K2H | 40 | - | - | |||||
Kapangidwe ka Mankhwala
| Kalasi yachitsulo | Mtundu wa de-oxidation a | % ndi kulemera, kuchuluka kwakukulu | ||||||
| Dzina lachitsulo | Nambala yachitsulo | C | C | Si | Mn | P | S | Nb |
| S235JRH | 1.0039 | FF | 0,17 | — | 1,40 | 0,040 | 0,040 | 0.009 |
| S275J0H | 1.0149 | FF | 0,20 | — | 1,50 | 0,035 | 0,035 | 0,009 |
| S275J2H | 1.0138 | FF | 0,20 | — | 1,50 | 0,030 | 0,030 | — |
| S355J0H | 1.0547 | FF | 0,22 | 0,55 | 1,60 | 0,035 | 0,035 | 0,009 |
| S355J2H | 1.0576 | FF | 0,22 | 0,55 | 1,60 | 0,030 | 0,030 | — |
| S355K2H | 1.0512 | FF | 0,22 | 0,55 | 1,60 | 0,030 | 0,030 | — |
| a. Njira yochotsera poizoni m'thupi imasankhidwa motere: FF: Chitsulo chophwanyidwa bwino chokhala ndi zinthu zomangira nayitrogeni m'njira zokwanira kumangirira nayitrogeni yomwe ilipo (monga osachepera 0,020 % Al yonse kapena 0,015 % Al yosungunuka).b. Mtengo wapamwamba kwambiri wa nayitrogeni sugwira ntchito ngati kapangidwe ka mankhwala kakuwonetsa kuchuluka kwa Al kocheperako kwa 0,020 % ndi chiŵerengero chochepa cha Al/N cha 2:1, kapena ngati pali zinthu zina zokwanira zomangira N. Zinthu zomangira N ziyenera kulembedwa mu Chikalata Chowunikira. | ||||||||
Makhalidwe abwino kwambiri a chitoliro chachitsulo cha S235 J0 chomwe chimagwiritsidwa ntchito m'njira zosiyanasiyana amachipangitsa kukhala choyenera kugwiritsidwa ntchito m'njira zosiyanasiyana. Kaya ndi mapulojekiti a mafakitale, amalonda kapena zomangamanga, chinthuchi chapangidwa kuti chikwaniritse zofunikira za ogwiritsa ntchito. Kugwira ntchito kwake kodalirika komanso kulimba kwake kumapangitsa kuti chikhale yankho lotsika mtengo pa ntchito iliyonse yomwe imafuna machubu ozungulira a arc.
Kuwonjezera pa chitoliro chachitsulo chozungulira cha S235 J0, mzere wathu wazinthu umaphatikizaponsoChitoliro chachitsulo cha A252 Giredi 3Chogulitsachi chimapangidwa pogwiritsa ntchito ukadaulo waposachedwa kwambiri wotsimikizira kuti chili ndi miyezo yapamwamba kwambiri komanso yodalirika. Chifukwa cha mphamvu yake yolimba komanso kukana dzimbiri, chitoliro chachitsulo cha A252 Giredi 3 ndi chabwino kwambiri pakugwiritsa ntchito molimbika.
Tikunyadira kupereka mzere wonse wa chitoliro cholumikizidwa ndi arc chomwe chimakwaniritsa ndikupitilira miyezo yamakampani. Kudzipereka kwathu ku khalidwe ndi zatsopano kwatipanga kukhala ogulitsa odalirika kumakampani opanga mapayipi achitsulo. Podzipereka kuchita bwino kwambiri, tikupitilizabe kupititsa patsogolo kupanga mapayipi achitsulo.
Ponena za chitoliro cholumikizidwa ndi arc chozungulira, zinthu zathu zimakhazikitsa muyezo wa magwiridwe antchito, kulimba komanso kudalirika. Chitoliro cha Chitsulo cha S235 J0 Spiral ndi Chitoliro cha Chitsulo cha A252 Giredi 3 ndi zitsanzo ziwiri chabe za kudzipereka kwathu kupatsa makasitomala athu mayankho abwino kwambiri. Timayang'ana kwambiri paubwino ndi luso ndipo timadzipereka kukwaniritsa zosowa za makasitomala athu ndikupitilira zomwe amayembekezera.
Mwachidule, chitoliro chathu chachitsulo chozungulira cha S235 J0 ndi chitoliro chachitsulo cha A252 cha kalasi 3 ndi zotsatira za ukadaulo wapamwamba komanso luso lapamwamba. Zogulitsazi zimapereka magwiridwe antchito osayerekezeka, zomwe zimapangitsa kuti zikhale chisankho chabwino kwambiri pa ntchito zosiyanasiyana. Kaya ndi zomangamanga, zomangamanga kapena mapulojekiti amafakitale, mapaipi athu ozungulira ozungulira opangidwa ndi arc welded adapangidwa kuti apereke zotsatira zabwino kwambiri. Khulupirirani kuti ukatswiri wathu ndi chidziwitso chathu zidzakupatsani mapaipi achitsulo abwino kwambiri pamsika.








