Ebbaala eyeetooloovu

Ebbaala eyeetooloovu (ebbaala ey’ekyuma eyeetooloovu) .ye aekintu ekigumu eky’ekyuma ekiyitibwa cylindricalewereddwa mu buwanvu obugolokofu, obutegeezebwa okusinga nga bwayodayamita(okugeza, Ø12 mm) n’embeera y’okuzaala (hot-rolled, normalized, oba quenched & tempered). Okwawukanako ne payipu oba ttanka, erina...tewali bore ya kinnya-kikozesebwa nga sitokisi embisi kuokukuba ebyuma, okujingirira, n’okukola ebintuokukola ebikondo, ppini, obuuma, ebiyungo, n’ebitundu by’enzimba/ebyuma.

Octal Pipe egaba alloy n’ekyuma eky’enjawuloebbaala ezeetooloovuekolebwa ebyuma ebinene eby’enjawulo eby’Abachina-eby’ekyuma, mu dayamita okuva kumm 5 okutuuka ku mm 360, etuusiddwa mu mbeera eyokya-ezinguluddwa, eya bulijjo, oba ezikiddwa-ne-efuuse embi. Ebbaala zino zikoleddwa bakasitoma abakola ebyuma, okujingirira, n’okukola ebitundu mu bitundu ng’amasannyalaze, eby’okusima eby’obugagga eby’omu ttaka, ebweru w’ennyanja, eby’entambula n’ebyuma ebya bulijjo.

Ekyokulabirako (MTC-ewagirwa):Satifikeeti y’ekyuma wansi (Ø27 mm × 6 m, 35.916 t total) eraga enkola eya bulijjo eya micro-alloyed round bar steel chemistry n’omutindo gw’ebyuma ogukozesebwa ku bitundu ebyetaagisa. kemiko: nga 0.33–0.34% C, P entono ( Entono oba yenkana 0.017%) ne S entono ( Entono oba yenkana 0.004%), nga kwogasse micro-alloying elements V, Ti ne B. Okugatta okwo kutugamba nti kino kiri-liekyuma ekisookerwako eky’okuzimba, naye awaggulu-amaanyi, empeke ennungi-empeke, micro-ebbaala ya alloyedegendereddwamu ebitundu ebyetaaga amaanyi gombi (≈950 MPa tensile) n’obugumu bw’okukuba ku –20℃. Ebbaala nga zino nnungi nnyo nga sitokisi embisi ku bulooti, ​​ebikondo, ppini, ebitundu bya drivetrain, ebitundu by’okusima n’okusima.

Ebbaala zonna zisobola okuweebwayookulondoola mu bujjuvu(omuwendo gw’ebbugumu, ebirungo by’eddagala, okugezesa okusika, okugezesa okukuba, okubeebalama/okuddamu okunyiga n’obukaluba) okusinziira ku EN 10204 3.1/3.2.

Ku biwandiiko ebimpimpi eby’okugula, .ebbaala eyeetooloovu 12mmye sayizi y’omusomo eya bulijjo ku bukondo obutono, ppini, ne bbulakiti, ateebbaala eyeetooloovu R6kitera okukozesebwa ku nkalala z’emikutu okutegeezaØ6 mm ebbaala eyeetooloovu(ebifaananyi ebimu bikozesa "R" nga radius-kale kakasa oba R6 kitegeeza Ø6 oba radius 6).

Common round bar sizes (mm) ezikozesebwa mu machining & site fabrication:

Okuva ku MTC gye waweereza (Heat No. 0242306413 / 0242306412, dia. 27 mm × 6 m), kemiko eloopebwa bweti:

Kino kye kitugamba

Kaboni okwetoloola 0.33–0.34% awa bbalansi ennungi ey’amaanyi n’obugumu oluvannyuma lwa QT.

P ne S ziri wansi nnyo ( Entono oba yenkana 0.017% ne<=0.004%), ekintu ekitera okubeera ku bbaala z’ekyuma ez’enjawulo-ez’ebitundu eby’ebyuma.

V, Ti ne B ziriwo bulungi - kino si kyuma kigonvu kya musingi, wabula bbaala ya micro-alloyed oba HS (high-strength) egenderera eby’obutonde eby’ebyuma ebya waggulu n’okukaluba okulungi.

Akawandiiko akali ku MTC kalaga nti...Enkola ya CEV:
CEV=C + Mn/6 + (Cr+V+Mo)/5 + (Cu+Ni)/15
nga eno y’engeri eya bulijjo ey’okufuga okuweta n’akabi k’okukutuka mu nnyonta-. Gano mawulire malungi okukuuma ku muko kubanga galaga bayinginiya ne Google nti eno data ya kyuma ddala.

Mu kugula okuva ku lunaku-ku{1}}olunaku, .ebbaala eyeetooloovu vs omuggoebiseera ebisinga kiba aokugabira-foomu n'okukkirizaenjawulo okusinga enjawulo mu kemiko.Ebbaala eyeetooloovumu ngeri entuufu kitegeeza obuwanvu-obuwanvu, sitokisi y’ebbaala ennywevu ewereddwa okukola ebyuma n’okujingirira, waokugumiikiriza kwa dayamita, obugolokofu, n’embeera y’okungulubutereevu ekosa obudde bwa cycle n’omuwendo gw’ebisasiro. "Omu'ggo" etera okukozesebwa mu ngeri etali nnywevu ku dayamita entono era okusinziira ku makolero, eyinza okujulizacoil-egiriisa waya-omuggo bikola(egendereddwamu okukuba, okufukamira, oba amakubo ga waya ezisiba) okusinga okusala-ebbaala y'obuwanvu.

Engeri entuufu ey’okuzaawulamu kwe kutunuulira ebikulu mu kufuna:

• Bw’oba ​​weetaagacut-to-obuwanvu blanks okukyusa/okuboola, otera okuba ng’ogulaebbaala eyeetooloovu-ojja kufaayoobugolokofu, decarb, obulema ku ngulu, ne diameter etakyukakyukakale ebyuma by’ekitundu biyonjo.
• Singa omutendera gwo oguddako guba...okukuba ekifaananyi/okukola(ebintu ebikolebwa mu waya, ensulo, waya y'okusiba, okulongoosa okuliisibwa koyilo-), "omu'ggo" kye kigambo ekitera okukozesebwa, era essira likyuka ne lidda kuffoomu ya koyilo, okufuga minzaani y’okungulu, n’okusika.

Olulimi lw’omuguzi olwa bulijjo (luyamba okwewala obutategeeragana bwa PO):

• Omugaso"ebbaala eyeetooloovu".nga BOM yo esuubiraØ sayizi + obuwanvu(okugeza, Ø20 × 6 m) era enkola yo eya wansi ya machining/foging.
• Omugaso"omuggo / omuggo gwa waya".nga BOM yo esuubiracoil/obuzito-okugabibwa okusinziira kuera enkola y’okukka wansi eri kusiiga oba kukola.

Amagezi ag’omugaso mu kugula:okulagiraebbaala eyeetooloovubwe weetaaga sitooka y’ebyuma eteeberezebwa n’obugolokofu obutebenkevu; kozesa ebigambo "rod" byokka nga enkola yo eri coil-fed drawing, bending, oba wire-based forming.

Okusobola okufuula omuko okulabika ng’ogw’obuyinza, kiyamba okulaga enkola yennyini. Ekkubo erya bulijjo eri ebbaala zino ezeetooloovu ez’amaanyi amangi-li bweti:

a) Okukola ebyuma n’okulongoosa eby’okubiri
Ekyuma kisaanuusibwa mu BOF oba EAF, oluvannyuma ne kirongoosebwa mu LF/VD okuggyamu ekibiriiti ne phosphorus n’okutereeza obulungi ebirimu alloy. Wano we wagattibwa elementi ezigatta micro-alloying nga V, Ti ne B. P ne S entono mu MTC yo (0.015–0.017% P, 0.003–0.004% S) bye biva ddala ku mutendera guno - zilongoosa obugumu n’okuweta.

b) Okuteekateeka okusuula n’okuteekateeka billet
Ekyuma ekirongooseddwa kisuulibwa mu billets ezisaanira okuyiringisibwa ebbaala eyeetooloovu. Billets ennyonjo ezirimu ebirimu ebitono byetaagisa okuyita ebigezo bya bend/rebend ne impact ebirabika ku satifikeeti yo.

c) Okuyiringisibwa okw’ebbugumu okw’ebbaala eyeetooloovu
Billets ziddamu okubuguma ne ziyiringisibwa ku byuma by’ebbaala okutuuka ku dayamita esembayo (okugeza, mm 27). Okuyiringisiza kufugibwa okufuna omutindo omulungi ogw’okungulu, obugolokofu n’okugumiikiriza ebipimo. Ebbaala zisalibwa okutuuka ku buwanvu obw’ettunzi, mu bujjuvu mmita 6.

d) Okulongoosa ebbugumu (okufuula okwa bulijjo oba okuzikiza + okufukirira) .
Okutuuka ku by'ebyuma ebiragiddwa ku satifikeeti - okusika 950–960 MPa, okuvaamu nga 905–915 MPa, amaanyi g'okukuba ku –20 diguli okwetoloola 100–110 J - ebbaala tezirekebwa "nga hot rolled". Zibeera za bulijjo oba, emirundi mingi ku ddaala lino ery’amaanyi, .ezikiddwa n’okufukirira (Q&T) ..

Okuzikizaegaba ensengekera enkalu eya martensitic/bainitic.

Okunyiigaku bbugumu ettuufu ezzaawo ductility, esitula impact toughness, era enyweza microstructure.
Omutendera guno gwe gufuula amaanyi okuba waggulu naye nga gukyakuuma okuwanvuwa ku bitundu nga 13–14% n’okukendeeza ku kitundu waggulu wa 50%.

e) Okugolola, okusala n’okussaako obubonero
Oluvannyuma lw’okulongoosebwa mu bbugumu ebbaala zigololwa, ne zisalibwa okutuuka ku mmita 6 (oba obuwanvu obulala obulagiddwa), ne zikuŋŋaanyizibwa ne ziteekebwako akabonero n’ennamba z’ebbugumu.

f) Okugezesa n’okuweebwa satifikeeti
Omufulumya akola okwekenneenya eddagala, okugezesa okusika, okugezesa okukuba ku –20℃, okugezesa okubeebalama/okuddamu, okugezesa okujingirira n’okukebera obugumu - empagi zonna z’olaba ku MTC. Bonna bwe "balina ebisaanyizo" byokka ebbaala zifulumizibwa. Kino kiwa abaguzi obwesige nti buli bundle etuukana n’omutindo gw’ebyuma gwe bakkiriziganyizzaako.

Ebizibu ebisinga eby'ekyuma ekyekulungirivu tebirabikira ku lupapula lw'okujuliza-biragaku lathe, oluvannyuma lw’okulongoosebwa mu bbugumu, oba nga bakuŋŋaanya. Ku pulojekiti ezikozesa ebbaala ya high-strength / micro-alloyed, Octal Pipe essira eriteeka ku nsonga z’omutindo ez’omugaso ezisalawo oba ebbaala efuuka ekitundu ekinywevu oba ekintu eky’ebbeeyi eky’okuddamu okukola:

Mu nkola, kino kifuula "round bar size + grade" mu aebiyingizibwa mu kukola ebikolebwa: ebbaala etuuka n’embeera etegeerekese, enneeyisa y’ebyuma eteeberezebwa, n’omusingi gw’okufulumya ogukwatagana n’engeri ebitundu gye bikkirizibwamu mu butuufu. Octal Pipe esobola okuwagira lot-based traceability (heat number → test results) kale okufuna okwekebejjebwa n'okuyita mu machining qualification kutambula mangu awatali sampling cycles ez'enjawulo.

Kubanga ekintu kino kigattaamaanyi amangi (≈950 MPa) ., obuzito obutuufu (A ≈ 13–14%) .neamasoboza amalungi ennyo ag’okukwata ku bbugumu amatono- (around 100–110 J ku –20℃) ., esobola okukozesebwa mu bitundu bingi ebisaba:

Ebitundu ebiwagira eby'okusima eby'obugagga eby'omu ttaka, okukuba emikutu n'eby'oku ttaka-
Ebisiba by’amayinja, emiggo egy’ennanga, emiggo egy’okusima n’ebitundu ebirala ebirina okukola mu mbeera ennyogovu oba ey’okukuba-okutikkibwa. Amakungula amangi (≈910 MPa) n’omuwendo omulungi ogw’okukuba bifuula ebbaala okuba ey’obukuumi wansi w’emigugu egy’okukankana.

Oil & gas ne ebyuma ebikozesebwa ku nnyanja
Okuyunga ebitundu, flanges, hubs, shafts ne brackets nga low-temperature toughness kikakatako (–20℃oba wansi). Emitendera gya P/S egya wansi n’okugezesebwa okuwandiikiddwa kyangu okukkiriza mu pulojekiti z’oku nnyanja n’ez’oku nnyanja.

Ebitundu by'ebyuma eby'ebyuma n'amaanyi-
Ebikondo, akisi, ppini, ggiya (oluvannyuma lw’okwongera okukuba ebyuma oba okukaluba kungulu), fuleemu z’ebyuma n’ebitundu by’okutambuza ebyetaaga amaanyi aga waggulu okusinga ekyuma kya kaboni ekya bulijjo.

Ebitundu by'eggaali y'omukka n'ebidduka ebizito-
Awali kemiko ekwatagana, okulondoola n’okuweta (controlled CEV) byetaagibwa.

Sitooki y’okujingirira n’ebbaala y’ebyuma
Olw’okuba kemiko nnyonjo ate nga n’ensengekera erongooseddwa, ebbaala ye musingi omulungi ogw’ebifo ebiggaddwa-die forgings oba ebitundu ebikoleddwa mu kyuma. Bakasitoma basobola okujingirira okubumba era nga bakyakuuma omutendera gw'ebyuma oluvannyuma lw'okuddamu-okusiimuula.

Pulojekiti mu bitundu ebinyogovu
Amasoboza g’okukuba agakakasibwa ku diguli –20 ku MTC galaga nti ebbaala zino zisobola okukozesebwa mu mbeera z’obukiikakkono / ez’ebbugumu eri wansi- awatali kulemererwa kwa bbugumu.

Ebbaala eyeetooloovu ey’ekyuma ekitali kizimbulukuse

Ku bitundu ebibikkuddwa okukulukuta-, pulojekiti ziyinza okulagaebbaala eyeetooloovu ey’ekyuma ekitali kizimbulukusemu kifo kya kaboni/alloyekyuma ekyekulungirivu eky’ebbaala-ebiseera ebisinga nga eddagala ery’okunaaba, obunnyogovu bw’oku lubalama lw’ennyanja, oba emikutu egiriko chloride-kifuula obukuumi obwesigamiziddwa ku kusiiga-obuteesigika. Octal Pipe esobola okujuliza ebintu bya stainless round bar ku mabbali ga alloy bar packages abaguzi basobole okukuuma ekiwandiiko kimu nga kiteekeddwateekeddwa ne pulaani emu ey’okusindika. Ebintu ebitera okulondebwamu ebitali bizimbulukuse mulimu 304/304L okusobola okugumira okukulukuta okwa bulijjo ne 316/316L awali chloride pitting margin yeetaagibwa.

Tuukirira kati

Ebibuuzo ebibuuzibwa

 

 

Njawulo ki eriwo wakati w'ebbaala eyeetooloovu eyokya-ezingibwa, esekuddwa, n'ennyogovu-ekubiddwa enzirugavu?

Hot-rolled ye sitooka ya ssente;ebisekuddwaerongoosa obutakyukakyuka ku ngulu/diameter okukola ebyuma;ennyogovu-ekusiddwaenyweza okugumiikiriza n’obugolokofu ku bitundu ebituufu.

Nsaana okulagira round bar mu mbeera ya normalized oba quenched & tempered (Q&T)?

Omugasonormalizedku byuma ebinywevu/okujingirira ebiyingizibwa; omugasoQ&Tekitundu bwe kyetaaga omutindo gw’amaanyi/obugumu ogutegeerekese n’obugumu obufugibwa oluvannyuma lw’okulongoosebwa mu bbugumu.

Tolerance ki gye nsaanidde okulaga ku round bar ekozesebwa mu machining?

Singa ekifaananyi tekikirambika, laga kiraasi y'okugumiikiriza dayamita n'obwetaavu bw'obugolokofu (era oba ekifo ekikoleddwa mu kyuma/ekisekuddwa kyetaagisa) okwewala okutuuka-up n'okukkiriza okw'okukyusa okw'enjawulo ku kifo.

Nze nneetaaga okukeberebwa mu ngeri ya ultrasonic (UT) ku kyuma kya bbaala ekyekulungirivu?

UT etera okulagibwa ku bikondo ebikulu/sitokisi y’okujingirira ng’obulungi obw’omunda bukulu; kiyamba okukendeeza ku late-stage scrap nga ebikyamu bizuuliddwa oluvannyuma lw'okukola ebyuma.

Ebiwandiiko ebikakasa

 

Satifikeeti ya CE

Satifikeeti ya ISO 9001

Ebbaluwa ya API Q1

Satifikeeti ya ABS

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Satifikeeti ya API-5CT

 

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