Tekanyetso ea Pipe ea Tšepe ea Astm A139
Ho hlahisa phaephe ea tšepe e potolohang ea S235 J0 - tharollo e feto-fetohang e etselitsoeng ho fihlela litlhoko tse fapaneng tsa indasteri ea sejoale-joale. E hlahisitsoe fekthering ea sejoale-joale e fumanehang Motseng oa Cangzhou, Profinseng ea Hebei, k'hamphani ea rona e bile moetapele tlhahisong ea tšepe ho tloha ka 1993. Khamphani e akaretsa sebaka sa lisekoere-mithara tse 350,000 'me e na le thepa eohle ea RMB limilione tse 680. Re motlotlo ho ba le basebetsi ba inehetseng ba litsebi tse 680 tse nang le boiphihlelo ba inehetseng ho faneng ka lihlahisoa tsa boleng bo holimo.
E 'ngoe ea likarolo tse ikhethang tsa phaephe ea tšepe e potolohang ea S235 J0 ke ho tenyetseha ha eona ho ikhethang ka bophara le litlhaloso tsa botenya ba lebota. Ho tenyetseha hona ho re lumella ho fihlela litlhoko tse fapaneng tsa tlhahiso, haholo-holo tlhahisong ea liphaephe tse nang le mabota a maholo. Hore na o hloka phaephe bakeng sa kaho, oli le khase, kapa lits'ebetso tse ling tsa indasteri, phaephe ea rona ea S235 J0 e entsoe ho fihlela litlhoko tse thata.ASTM A139maemo a liphaephe tsa tšepe ho netefatsa botshepehi le tshebetso esita le maemong a thata ka ho fetisisa.
Boitlamo ba rona ho boleng le boqapi bo bolela hore karolo e 'ngoe le e 'ngoe ea phaephe ea tšepe ea S235 J0 e feta litekong tse matla le lits'ebetsong tsa taolo ea boleng, ho netefatsa hore sehlahisoa seo u se fumanang ha se fihlelle feela empa se feta maemo a indasteri. Ka boiphihlelo le boiphihlelo ba rona bo boholo, re ikemiselitse ho fa bareki ba rona litharollo tse ntle ka ho fetisisa tse etselitsoeng ho fihlela litlhoko tsa bona tse ikhethileng.
Tlhaloso ea Sehlahisoa
| sehlopha sa tšepe | matla a fokolang a chai Mpa | Matla a tšepe | Bolelele bo fokolang % | Matla a fokolang a tšusumetso J | ||||
| Botenya bo boletsoeng mm | Botenya bo boletsoeng mm | Botenya bo boletsoeng mm | mochesong oa teko ea | |||||
| 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 | - | - | |||||
Sebopeho sa Lik'hemik'hale
| Sehlopha sa tšepe | Mofuta oa ho tlosa oksijene a | % ka boima, boholo | ||||||
| Lebitso la tšepe | Nomoro ea tšepe | 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. Mokhoa oa ho tlosa oxidation o khethiloe ka tsela e latelang: FF: Tšepe e bolailoeng ka botlalo e nang le likarolo tse tlamang naetrojene ka bongata bo lekaneng ho tlama naetrojene e fumanehang (mohlala, bonyane 0,020 % kakaretso ea Al kapa 0,015 % Al e qhibilihang).b. Boleng bo phahameng ka ho fetisisa ba naetrojene ha bo sebetse haeba motsoako oa lik'hemik'hale o bontša bonyane kakaretso ea Al ea 0,020 % ka karolelano ea bonyane ea Al/N ea 2:1, kapa haeba ho na le likarolo tse ling tse lekaneng tsa N-binding. Likarolo tse tlamang N li tla tlalehoa Tokomaneng ea Tlhahlobo. | ||||||||
Molemo oa Sehlahisoa
1. E 'ngoe ea melemo e meholo ea phala ea tšepe ea ASTM A139 ke ho tenyetseha ha eona ka bophara le litlhaloso tsa botenya ba lebota. Ho tenyetseha hona ho lumella bahlahisi ho hlahisa liphaephe ka boholo bo fapaneng ho fihlela litlhoko tse fapaneng tsa projeke.
2. Bokgoni ba tlhahiso ba khamphani e kang ya rona, e Cangzhou, Profenseng ya Hebei, bo ntlafatsa melemo ya ASTM A139.
3. E thehiloe ka 1993, fektheri ea rona e akaretsa sebaka sa lisekoere-mithara tse 350,000, e na le thepa eohle ea RMB limilione tse 680, 'me e hirile basebetsi ba nang le boiphihlelo ba 680. Meralo ena e meholo ea motheo e re nolofalletsa ho fihlela litlhoko tse fapaneng tsa bareki ha re ntse re boloka maemo a holimo a tlhahiso.
Khaello ea sehlahisoa
1. Tekanyetso ea ASTM A139 e kanna ea se ke ea akaretsa litlhoko tsohle tse ikhethileng bakeng sa lits'ebetso tse itseng, e leng se fellang ka ts'ebetso e ka bang le meeli tlas'a maemo a feteletseng.
2. Ts'ebetso ea tlhahiso e ka ba e rarahaneng le e bitsang chelete e ngata ho feta litekanyetso tse ling, e leng se ka amang litheko le ho fumaneha ha tsona.
Phello
Phaephe ea Tšepe e Kobehileng ea S235 J0 e molemo haholo ho bahlahisi ka lebaka la ho ikamahanya le maemo ha eona. Bokhoni ba ho iketsetsa bophara le botenya ba lebota bo lumella tlhahiso ea phaephe ea boleng bo holimo, e nang le mabota a teteaneng e fihlelang litlhoko tse itseng tsa projeke. Ho tenyetseha hona ha ho eketse feela katleho ea tlhahiso, empa hape ho netefatsa hore sehlahisoa sa ho qetela se ka mamella maemo a fapaneng a tikoloho le likhatello, e leng se etsang hore se lokele mefuta e mengata ea lits'ebetso.
Feme ea rona e Cangzhou, Profinseng ea Hebei, 'me e bile sebapali sa bohlokoa indastering ea tšepe ho tloha ha e thehoa ka 1993. Feme ea rona e akaretsa sebaka sa lisekoere-mithara tse 350,000, e na le thepa eohle ea RMB limilione tse 680, 'me e hirile basebetsi ba nang le boiphihlelo ba 680. Meralo ena ea motheo e matla e re nolofalletsa ho hlahisa liphaephe tsa tšepe tsa boleng bo holimo tse fihlelang maemo a ASTM A139, ho netefatsa hore lihlahisoa tsa rona li fihlela litlhoko tse thata tsa bareki ba rona.
ASTM A139phaephe ea tšepetekanyetso e na le tšusumetso e kholo tlhahisong ea phaephe ea tšepe e potolohang ea S235 J0, e ntlafatsa ho ikamahanya le maemo ha tlhahiso le boleng ba sehlahisoa. Ha re ntse re tsoela pele ho qapa le ho atolosa bokhoni ba rona, re ntse re ikemiselitse ho fana ka litharollo tse ntle tsa tšepe tse fihlelang litlhoko tse fetohang tsa indasteri.
LBH
P1: ASTM A139 ke eng?
ASTM A139 ke tlhaloso e tloaelehileng e hlalosang litlhoko tsa phaephe ea tšepe e tjheseletsoeng ka motlakase. Liphaephe tsena hangata li sebelisoa lits'ebetsong tse nang le khatello e tlase 'me li tsejoa ka matla le ho tšoarella ha tsona. Tekanyetso e netefatsa hore liphaephe li fihlela litšobotsi tse itseng tsa mechini le metsoako ea lik'hemik'hale, e leng se etsang hore li lokele mefuta e fapaneng ea ts'ebeliso ea indasteri.
P2: Melemo ea phaephe ea tšepe ea S235 J0 spiral ke efe?
E 'ngoe ea melemo e meholo ea phaephe ea tšepe e potolohang ea S235 J0 ke ho tenyetseha ha eona ka bophara le litlhaloso tsa botenya ba lebota. Ho tenyetseha hona ho lumella bahlahisi ho hlahisa phaephe ea boleng bo holimo, e nang le mabota a teteaneng e ka mamellang likhatello le likhatello tse matla. Bokhoni ba ho iketsetsa litlhaloso tsena bo etsa hore phaephe ea S235 J0 e be khetho e ntle bakeng sa merero e hlokang boholo le matla a itseng.
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