Round Bar

Round bar (puab steel bar)yog akhoom cylindrical steel khoommuab nyob rau hauv ncaj lengths, txhais mas los ntawm nwstxoj kab uas hla(piv txwv li, Ø12 mm) thiab tus me nyuam mob (kub-kub, normalized, los yog quenched & tempered). Tsis zoo li cov yeeb nkab lossis raj, nws muajtsis muaj hollow bore- nws yog siv los ua raw khoom raumachining, forging, thiab fabricationlos ua shafts, pins, bolts, couplings, thiab structural / mechanical Cheebtsam.

 

Octal Pipe muab cov hlau thiab cov hlau tshwj xeebpuag ncig barua los ntawm loj Suav tshwj xeeb - steel mills, nyob rau hauv diameters los ntawm5mm txog 360mm, xa hauv kub- dov, normalized, los yog quenched - thiab - tempered mob. Cov tuav no yog tsim los rau cov neeg muas zaub uas ua machining, forging, thiab ib feem tsim nyob rau hauv sectors xws li lub zog, mining, offshore, tsheb thauj mus los thiab dav siv machinery.

Piv txwv (MTC-backed):Daim ntawv pov thawj zeb hauv qab no (Ø27 mm × 6 m, 35.916 t tag nrho) qhia txog qhov raug micro-alloyed round bar steel chemistry thiab cov tshuab siv rau qhov xav tau. Chemistry: kwv yees li 0.33–0.34% C, qis P (tsawg dua lossis sib npaug li 0.017%) thiab qis S (tsawg dua lossis sib npaug li 0.004%), ntxiv rau micro- alloying ntsiab V, Ti thiab B. Qhov sib xyaw ua ke qhia peb qhov no yogtsis yogib qho yooj yim siv steel, tab sis asiab- zog, nplua- nplej, micro-alloyed barnpaj rau qhov chaw uas xav tau ob lub zog (≈950 MPa tensile) thiab cuam tshuam toughness ntawm -20 degree. Cov tuav zoo li no yog qhov zoo tagnrho rau cov khoom nyoos rau bolts, shafts, pins, drivetrain parts, drilling thiab mining Cheebtsam.

 

Txhua lub bar tuaj yeem muab nrogtag nrho traceability(cov xov tooj cua sov, tshuaj lom neeg muaj pes tsawg leeg, ntsuas tensile, kev sim cuam tshuam, khoov / rov kho thiab hardness) raws li EN 10204 3.1/3.2.

 

 

 

 

Yam khoom	Qhov ntau thiab tsawg
Kub- dov puag ncig bar	5-360 hli
Pav ca	Dav 50 - 810 mm, thickness 6 - 160 mm
Square bar	150mm, 200mm, 250mm, 280mm

 

Rau kev muag khoom luv luv,round bar 12mmyog ib qho kev cob qhia me me rau cov shafts me me, pins, thiab brackets, thaumpuag ncig R6feem ntau siv rau hauv cov npe ntawm qhov chaw txhais tau tiasØ 6 hli round bar(qee qhov kos duab siv "R" raws li lub vojvoog-yog li paub meej tias R6 txhais tau tias Ø6 lossis vojvoog 6).

 

Common round bar qhov ntau thiab tsawg (mm) siv hauv machining & site fabrication:

 

Round bar loj (mm)	Kev siv ntawm qhov chaw (ua haujlwm tiag)
6 (R6) / 8 / 10	Me pins, thauj tog rau nkoj accessories, lub teeb brackets, jig qhov chaw
12 hli (12 hli) / 16 / 20	General shafts, tes tsho, adapters, kho qhov chaw
25 / 30 / 40	Couplings, tsav Cheebtsam, machined hubs
50 / 60 / 80	Heavy-cov haujlwm pins, mining hnav qhov chaw, forged blanks
100+	Loj machining Tshuag, kev cai forged Cheebtsam

 

 

 

Los ntawm MTC koj xa tuaj (Huab cua tsis muaj. 0242306413 / 0242306412, dia. 27 mm × 6 m), chemistry tau tshaj tawm zoo li no:

 

Element	Test 1	Xeem 2	Unit / hais
C	0.33	0.34	% (x100 → 33 / 34)
Si	0.28	0.26	%
Mn	0.68	0.57	%
P	0.015	0.017	% (P tsawg heev, zoo toughness)
S	0.003	0.004	% (S tsawg heev, kev huv zoo)
Cr	0.018	0.021	% (Micro Cr)
Cu	0.009	0.005	%
V	0.063	0.066	% (micro-alloying rau ntxiv dag zog)
Ti	0.042	0.043	% (txhim kho cov nplej)
B	0.0030	0.0030	% (kev txhim kho hardenability)

 

Qhov no qhia peb li cas

Cov pa roj carbon ib puag ncig 0.33-0.34% muab qhov sib npaug zoo ntawm lub zog thiab tawv tom qab QT.

P thiab S yog tsawg heev (Tsawg tshaj los yog sib npaug rau 0.017% thiab Tsawg dua los yog sib npaug rau 0.004%), uas yog qhov tshwj xeeb ntawm - steel tuav rau txhua yam khoom.

V, Ti thiab B tau meej meej tam sim no - qhov no tsis yog cov hlau me me, tab sis micro-alloyed lossis HS (siab-} zog) bar tsom rau cov khoom siv tshuab siab thiab zoo hardenability.

Daim ntawv ceeb toom ntawm MTC qhia tau hais tiasCEV formula:
CEV=C + Mn/6 + (Cr+V+Mo)/5 + (Cu+Ni)/15
uas yog txoj hauv kev niaj hnub los tswj kev weldability thiab txias -kev pheej hmoo tawg. Qhov no yog cov ntaub ntawv zoo khaws cia rau ntawm nplooj ntawv vim nws qhia rau cov kws tshaj lij thiab rau Google tias qhov no yog cov ntaub ntawv tiag tiag.

 

 

Hauv hnub- mus rau- hnub yuav khoom,round bar vs rodfeem ntau yog amuab- daim ntawv thiab txaiskev sib txawv ntau dua li qhov sib txawv ntawm chemistry.Round barfeem ntau txhais tau hais tias ncaj-ntev, khoom bar Tshuag khoom rau machining thiab forging, qhov twgtxoj kab uas hla kam rau ua, ncaj, thiab qhov chaw nyobncaj qha cuam tshuam lub voj voog lub sij hawm thiab seem seem. "Qws" feem ntau yog siv ntau xoob rau cov kab me me thiab, nyob ntawm kev lag luam, yuav xa mus raucoil-fed hlau- qws daim ntawv(xav kom kos duab, khoov, los yog fastener xaim txoj kev) es tsis yog txiav -length bar.

Ib txoj hauv kev zoo los cais lawv yog saib seb qhov tseem ceeb ntawm kev txais:

 

• Yog koj xav tautxiav - mus rau - qhov ntev blanks rau tig / tho txawv, koj feem ntau yuavpuag ncig bar-koj yuav mob siab raustraightness, decarb, defects nto, thiab raws txoj kab uas hlayog li cov tshuab ua kom huv.
• Yog koj cov kauj ruam tom ntej nokos duab/forming(cov khoom siv hlau, cov hlua khi, cov hlua khi, cov coil- pub ua), "rod" feem ntau yog lo lus siv, thiab kev tsom mus raucoil daim ntawv, nto scale tswj, thiab drawability.

 

Hom lus tus neeg yuav khoom (pab kom tsis txhob PO tsis meej):

 

• Siv"round bar"thaum koj BOM xav tauØ Loj + ntev(piv txwv li, Ø20 × 6 m) thiab koj cov txheej txheem qis qis yog machining / forging.
• Siv"roj / hlau rod"thaum koj BOM xav taucoil/weight-raws li khoomthiab cov txheej txheem downstream yog kos los yog tsim.

 

Cov lus qhia txog kev yuav khoom:xajpuag ncig barthaum koj xav tau kev kwv yees machining Tshuag thiab ruaj khov ncaj; siv "rod" lo lus tsuas yog thaum koj cov txheej txheem yog coil - pub kos duab, khoov, lossis xaim- raws li kev sib sau.

 

 

Txhawm rau ua kom cov nplooj ntawv zoo li muaj cai, nws pab qhia cov txheej txheem tiag tiag. Ib txoj hauv kev rau cov siab - lub zog puag ncig yog raws li hauv qab no:

a) Steelmaking thiab theem nrab refining
Cov hlau yog yaj hauv BOF lossis EAF, tom qab ntawd kho hauv LF / VD kom tshem tawm cov sulfur thiab phosphorus thiab kho cov ntsiab lus alloy kom meej. Qhov no yog qhov micro-alloying ntsiab xws li V, Ti thiab B ntxiv. Tsawg P thiab S hauv koj qhov MTC (0.015–0.017% P, 0.003–0.004% S) yog qhov tshwm sim ntawm cov kauj ruam no - lawv txhim kho toughness thiab weldability.

b) Casting thiab billet npaj
Cov hlau refined yog cam khwb cia rau hauv billets haum rau dov puag ncig bar. Clean billets nrog cov ntsiab lus qis yog qhov tseem ceeb kom dhau qhov khoov / thim rov qab thiab cov kev ntsuas cuam tshuam uas tshwm sim ntawm koj daim ntawv pov thawj.

c) Kub dov ntawm round bar
Billets yog reheated thiab dov rau ntawm bar mills mus rau qhov kawg txoj kab uas hla (piv txwv li, 27 hli). Rolling yog tswj kom tau qhov zoo ntawm qhov zoo, ncaj thiab qhov ntev ntev. Bars raug txiav rau kev lag luam ntev, feem ntau 6 m.

d) Kev kho cua sov (normalizing lossis quenching + tempering)
Txhawm rau kom ncav cuag cov khoom siv kho tshuab pom nyob rau hauv daim ntawv pov thawj - tensile 950–960 MPa, tawm los ntawm 905–915 MPa, cuam tshuam lub zog ntawm -20℃nyob ib ncig ntawm 100–110 J - cov tuav tsis tshuav "li kub dov". Lawv yog cov normalized los yog, ntau zaus rau lub zog no,quenched thiab tempered (Q & T).

Quenchingmuab ib qho nyuaj martensitic/bainitic qauv.

TemperingNyob rau ntawm qhov kub thiab txias, restores ductility, nce tej yam toughness, thiab stabilizes lub microstructure.
Cov kauj ruam no yog qhov ua rau lub zog siab tab sis tseem ua kom elongation ntawm li 13-14% thiab txo qis ntawm thaj tsam saum toj 50%.

e) Ncaj, txiav thiab kos npe
Tom qab kev kho cua sov, cov tuav tau ncaj, txiav mus rau 6 m (los yog lwm qhov ntev txiav txim), ntim thiab cim nrog cov lej kub.

f) Kev xeem thiab ntawv pov thawj
Cov neeg tsim khoom ua cov tshuaj ntsuam xyuas, ntsuas qhov tensile, qhov ntsuas qhov cuam tshuam ntawm -20 degree, khoov / rebend test, forging test thiab hardness check - tag nrho cov kab koj pom ntawm MTC. Tsuas yog thaum tag nrho lawv "tsim nyog" yog cov tuav tso tawm. Qhov no ua rau cov neeg yuav khoom ntseeg siab tias txhua pob khoom ua tau raws li qib kev pom zoo.

 

 

 

Feem ntau cov teeb meem puag ncig steel tsis tshwm rau ntawm daim ntawv hais lus- lawv tshwmntawm lub tshuab dhos, tom qab kev kho cua sov, lossis thaum sib dhos. Rau cov haujlwm uas siv siab - zog / micro-alloyed bar, Octal Pipe tsom rau cov ntsiab lus zoo uas txiav txim siab seb lub bar puas yog ib feem ruaj khov lossis cov khoom siv kim dua:

 

Dab tsi feem ntau mus tsis ncaj ncees lawm ntawm qhov chaw	Dab tsi los qhia (tus neeg yuav khoom lus)	Dab tsi Octal Pipe tswj ntawm lub zeb
Cov cuab yeej tsis npaj txhij hnav / rhuav tiav	Kev xa khoom tuaj + qhov yuav tsum tau ua (kub- dov / peeled / kos)	Txoj kev npaj deg (piv txwv li, tev qhov twg yuav tsum tau) + straightening kom txo tau cov machining variation
Dimensional drift tom qab machining	Txoj kab uas hla kam rau ua + straightness yuav tsum tau	OD / ovality + straightness checks kom tig cov nyiaj tau los kwv yees
Cracking thaum lub caij txias pib / cuam tshuam cov xwm txheej	Kev cuam tshuam lub zog ntawm qhov ntsuas kub (piv txwv li, "CVN @ -20 degree")	Kev soj ntsuam cuam tshuam khi rau cua sov / ntau; tso tawm raws li cov ntaub ntawv pov thawj, tsis yog kev xav
Thaum tshav kub kub- kho qhov tsis sib xws (ntau dhau / mos heev)	Thaum tshav kub kub kho lub xeev (normalized / Q&T) + hardness qhov rais	Thaum tshav kub kub- kev qhuab qhia kev kho mob + kev txheeb xyuas qhov tawv tawv tiv thaiv lub qhov rai uas tau teev tseg
Ncua qhov tsis xws luag pom lig	NDT Scope yog qhov tseem ceeb (UT los ntawm kev pom zoo)	UT kev xaiv rau cov khoom tseem ceeb + kev kho kom rov qab / rov ua dua - cov ntaub ntawv xeem qhov twg siv tau

 

Hauv kev xyaum, qhov no hloov "round bar loj + qib" rau hauv aworkable ntau lawm tswv yim: lub bar tuaj txog nrog ib qho xwm txheej, kev kwv yees machining tus cwj pwm, thiab lub hauv paus kev tso tawm uas sib xws li cas cov khoom tau txais tiag tiag. Octal Yeeb Nkab tuaj yeem txhawb nqa ntau ntau-raws li kev taug qab (cov xov tooj cua sov → cov txiaj ntsig kev xeem) yog li tau txais kev tshuaj xyuas thiab kev ua haujlwm qis qis qis dua mus sai dua yam tsis muaj qhov piv txwv ntxiv.

 

 

Vim tias cov khoom no sib xyaw ua kesiab zog (≈950 MPa), tsim nyog ductility (A ≈ 13-14%)thiabzoo heev low -kub qhov cuam tshuam lub zog (kwv yees 100-110 J ntawm -20 degree), nws tuaj yeem siv ntau yam ntawm qhov xav tau:

Mining, tunneling thiab hauv av-cov khoom txhawb nqa
Pob zeb bolts, thauj tog rau nkoj rods, laum rods thiab lwm qhov chaw uas yuav tsum tau ua hauj lwm nyob rau hauv txias los yog cuam tshuam - loaded tej yam kev mob. Cov txiaj ntsig siab (≈ 910 MPa) thiab tus nqi cuam tshuam zoo ua rau lub bar muaj kev nyab xeeb hauv kev poob siab.

Roj & roj thiab cov khoom siv offshore
Txuas cov khoom, flanges, hubs, shafts thiab brackets qhov twg tsawg -kub toughness yog yuav tsum tau (–20℃los yog qis dua). Cov qib P/S qis thiab cov ntaub ntawv xeem ua kom yooj yim rau kev lees txais hauv cov dej hiav txwv thiab dej hiav txwv.

Cov khoom siv thiab lub zog- cov khoom siv
Shafts, axles, pins, gears (tom qab machining los yog nto hardening), tshuab thav ntawv thiab kis tau tus mob Cheebtsam uas yuav tsum tau muaj zog dua li cov pa roj carbon zoo tib yam.

Railway thiab hnyav- tsheb yam
Qhov twg ua tau zoo ib yam chemistry, traceability thiab weldability (tswj CEV) yuav tsum tau.

Forging Tshuag thiab machining bar
Vim hais tias cov chemistry yog huv si thiab cov qauv yog refined, lub bar yog lub hauv paus zoo rau kaw - tuag forgings los yog machined qhov chaw. Cov neeg siv khoom tuaj yeem tsim kho kom zoo thiab tseem khaws cov txheej txheem kho tshuab tom qab re- tempering.

Cov phiaj xwm hauv cheeb tsam txias
Qhov pov thawj cuam tshuam lub zog ntawm -20℃ntawm MTC qhia tau hais tias cov kab no tuaj yeem siv rau sab qaum teb / qis- qhov kub thiab txias yam tsis muaj qhov ua tsis tiav.

 

Stainless hlau Round Bar

Rau corrosion- cov khoom pov tseg, tej yaam num yuav qhia meejstainless hlau round bartsis yog carbon / alloyround bar steel-feem ntau yog thaum cov tshuaj ntxuav dej, cov av noo ntawm ntug dej hiav txwv, los yog cov tshuaj chloride-cov khoom siv coj los ua txheej txheej- raws li kev tiv thaiv tsis tuaj yeem ntseeg tau. Octal Yeeb Nkab tuaj yeem hais cov khoom tsis sib haum nrog rau cov pob khoom alloy yog li cov neeg yuav khoom tuaj yeem khaws ib daim ntawv teev thiab ib qho kev npaj xa khoom. Cov kev xaiv tsis zoo xws li 304/304L rau kev tiv thaiv corrosion thiab 316/316L qhov twg chloride pitting margin yuav tsum.

 

Hu rau tam sim no

 

 

Yam khoom	Kev piav qhia
Txoj kab uas hla	5 - 360 mm (kub- dov); forged los yog peeled qhov ntau thiab tsawg ntawm kev thov
Ntev	6 m raug, 3-12 m tuaj yeem teem caij
Kev xa khoom	Raws li dov, normalized, Q&T
Cov qauv peb tuaj yeem phim	GB / T, ASTM / AISI, EN, shipbuilding lossis cov neeg siv khoom kos duab
Cov ntaub ntawv	Mill daim ntawv pov thawj (chemistry + mechanicals + impact), packing list, origin
Kev tshuaj xyuas	Thib peb- tog (SGS / BV) tuaj yeem npaj ua ntej xa khoom

Cim npe nrov: Tuam Tshoj round bar manufacturers, lwm tus neeg, Hoobkas