1. Dab tsi yog txias - rolled steel? Dab tsi yog qhov tseem ceeb ntawm nws thiab kub - rolled steel?
Txias - rolled steel yog hais txog cov steel ua los ntawm rolling kub {1} ricking, cleating, thiab temneing. Nws cov tuab tuab li los ntawm 0.1 txog 3 hli (feem ntau cov gauges nyias).
2. Dab tsi ua cov khoom lis dej num rau txias- rolled steel (xws li SpCC thiab DC01) txhais li cas? Txawv cov teb chaws / qauv muaj muaj kev tsim qauv sib txawv. Cov feem ntau cov uas yog tus Japanese Jis thiab EU thiab EN Txheej txheem:
Japanese Jis: Piv txwv li, spccese, spcc (s- steel, p}}}}}} - cov qhab nia). Spcc Stugs rau "General Txias - rolled carbon steel phaj." Tseem muaj SPCD (Stamping qib, nrog kev txhim kho kom zoo dua) thiab hom (kos duab sib sib nqus, haum rau cov kev sib sib zog nqus).
EU en: piv txwv li, dc01 (d - kev kos duab qib, storing} Kev kos duab rau St12, St14, thiab ST14 hauv Suav GB tus qauv.
Cov tub ntxhais kawm tseem ceeb: cov tsiaj ntawv ntxiv / cov lej tom qab tsim qauv, qhov zoo dua plasticity thiab kev ua haujlwm stamping (haum rau kev ua ntau dua).
3. Dab tsi yog lub hom phiaj ntawm "annealing" txheej txheem rau txias- rolled steel? Thaum lub sij hawm txias cov txheej txheem, steel los xij yauv ua haujlwm nyuaj "(nce lub zog, txo cov khoom tawg, thiab nce ntxiv. Annealing yog qhov txheej txheem tseem ceeb rau kev hloov kho cov khoom no:
Muaj nuj nqi 1: Tshem tawm ua haujlwm ua haujlwm tawv, txo cov tawv tawv, thiab kho kom zoo dua qub (yooj yim tsim cov txheej txheem ntxiv xws li Stamping thiab khoov);
Muaj nuj nqi 2: Txhim kho cov khoom siv microstration microstrabture, thiab txhim kho cov ntawv ruaj khov ntawm cov ntawv stability ntawm cov ntawv sib tw (zam cov kev tawg hauv zos thaum lub sijhawm tsim);
Muaj nuj nqi 3: Tshem tawm sab hauv kev ntxhov siab (tiv thaiv kev deformation thaum lub sijhawm cia / kev ua haujlwm ntawm txias- rolled ntawv).
Cov qauv siv nyiaj pab rau lwm tus muaj xws li: hood ua, tus nqi qis) thiab muaj txiaj ntsig tsis tu ncua (haum rau high - xav cov khoom lag luam).
4. Dab tsi yog hom "txheej txheem" siv rau ntawm txias-} daim ntawv? Vim li cas cov txheej tsim nyog? Txias - rolled steel inherently muaj kev tsis zoo corrosion tsis kam (nquag siv xeb). Txheej ci tau thov los txhim kho corrosion tsis kam thiab txuas lub neej pabcuam ntev. Hom coating muaj xws li:
Galvanized steel (qhov nrov tshaj plaws): Xws li SGCC (kub - dip galvanized txias {} {rolled steel). Lub zinc txheej cais cov cua thiab dej noo thiab muab kev tiv thaiv kev fij tseg (zinc corroundes (cov zinc corroundes ua ntej, tiv thaiv cov hlau).
Alu - kev txiav txheej: xws li AZ150 (Aluminium - zinc aloy txheej, 55% zinc). Nws corrosion tsis kam yog 3 {{- 5 lub sij hawm uas ntawm tus qauv galvanizing (haum rau sab nraum zoov cov ntawv thov, xws li cov nplooj hlau ua ntej steel).
Tinplate txheej (Tinplate): xws li SPTE, tsis yog qhov ci, tsis haum rau cov khoom noj khoom haus (xws li cov kaus poom thiab dej haus cov kaus poom).
Chrome txheej: xws li chrome - plhaw ua kom lub zog loj thiab hnav kom haum rau cov khoom siv zoo nkauj (xws li cov khoom siv hluav taws xob).
5. Dab tsi yog lub hom phiaj ntawm "flattening" txheej txheem rau txias- rolled steel? Leveling yog cov txheej txheem kawg hauv txias - rolled steel ntau lawm (tom qab annealing). Nws cov haujlwm muaj xws li:
Kho: Tshem tawm "cov kab npauj npaim" (caij tsheb ntawm cov npoo thiab nruab nrab ntawm cov hlau nplaum) tom qab ua kom tsis txhob muaj kev ntxhov siab (kom tiv thaiv tsis ncaj ncees);
Kho kom haum saum npoo av: tswj lub ntsej muag saum npoo ntawm lub txias- matte, kom haum cov roughness ntawm cov roughness ntawm cov roualing rollers;
Kev ntxiv me ntsis: nce mentsis muaj zog los ntawm dov nrog kev txo me me (1% -3%) (kom tiv thaiv kom tsis txhob muag dhau).
6. Dab tsi yog cov txheej txheem ua tiav rau cov khaub thuas-} rolled steel? Cov txheej txheem tseem ceeb: kub- raw khoom raw → Tempering → Tempering → Tempering → Tempering → Tempering → Tempering → Tempering (shritting / splitting / splitting / splitting / splitting / splitting / splitting / splitting) → kev kuaj xyuas → ua tiav cov khoom tiav; Kauj Ruam - by -}}} qib ntsuas:
Kub -} rawed raw khoom: 3 {}}}}}}}}}}} kub rolling cob "(uas yuav tsum tau descaling);
Pickling: Hydrochloric acid / sulfuric acid / sulfuric acid / re₂o₃) ntawm cov phaj kub kom tiv thaiv kom tsis txhob raug kaw thiab cuam tshuam rau qhov zoo;
Colding txias: Nruam kev hloov dua tshiab (txo nce txog 70%) yog ua nyob rau hauv chav sov siv cov tuab si colling (piv txwv li, 0.5mm);
Annaling: Lub cev qhuav tawv - polled steel phaj yog muab tso rau hauv ib qho kev siv hluav taws xob thiab muaj nyob ntawm cov khoom siv) kom tshem tawm cov khoom ua haujlwm hnyav;
Tempering: Lub annealed steel phaj yog dov siv ib lub siab npau taws nrog kev txo me me kom raug cov duab thiab kho cov ntxhib;
Xov: Shearing rau hauv kev txiav - - ntev ntev li cas} Tsom, 12,) Cov txiaj ntsig tau tshwm sim yog muab tso rau hauv cia.
7. Dab tsi yog cov teeb meem ib txwm muaj nrog pickling thaum txias-} rolled ntawv ntau lawm? Yuav ua li cas lawv thiaj zam? Cov teeb meem thiab kev daws teeb meem:
Qhov Teeb Meem 1: Tsis tiav Pickling (seem oxide nplai, dub me ntsis nyob rau saum npoo
Qhov Teeb Meem 2: Tshaj -} → corrosion (kho kom zoo rau lub sijhawm steel
Qhov Teeb Meem 3: acid kua mis paug → tov tawm: Nruab ib qho kev sau ua kua (xws li ntauwd pej thuam) thiab siv cov acid mian suppressant.