Raunpela Bar

Raunpela baret (raunpela ain baret)em i wanpelastrongpela silindrikal ain prodakol i givim long ol stretpela longpela, we ol i makim longdiamita(olsem, Ø12 mm) na kondisen bilong givim (hot-rolim, nomolais, o kilim na tanim). Em i no olsem paip o tiub, em i gatnogat hul hul-em i yusim olsem 'raw stock' bilongwokim ol masin, wokim ol samting, na wokim ol samtinglong wokim ol 'shaft', 'pin', 'bolt', 'coupling', na ol samting bilong 'structural/mechanical'.

 

Octal Pipe i save saplaim ol aloi na spesel ainol raunpela baretol i wokim long ol bikpela spesel-stiel mil bilong Saina, long diamita bilong5 mm i go inap long 360 mm, ol i givim long hot-rol, nomolais, o 'quenched-na-tempered kondisen. Ol dispela 'bar' em ol i wokim bilong ol kastoma husat i save mekim wok masin, 'forging', na wokim ol hap bilong en long ol sekta olsem eneji, maining, ofso, trenspot na jeneral masin.

Eksampel (MTC-bek):Mill setifiket aninit (Ø27 mm × 6 m, 35.916 t olgeta) i soim wanpela kain 'micro-alloyed round bar steel chemistry' na 'mechanical level' we ol i save yusim long ol bikpela hap. kemistri: samting olsem 0.33-0.34% C, liklik P ( Liklik o wankain olsem 0.017%) na liklik S ( Liklik o wankain olsem 0.004%), na tu ol 'micro-alloying elements' V, Ti na B. Dispela kombinesen i tokim yumi olsem dispela emnowanpela besik konstraksen ain, tasol wanpelastrongpela-, gutpela-grain, liklik-aloi barem i bilong ol hap we i nidim strong (≈950 MPa 'tensile') na strong bilong 'impact' long –20 digri. Ol 'bar' olsem dispela i gutpela olsem ol 'raw stock' bilong ol 'bolt', 'shaft', 'pin', ol hap bilong 'drivetrain', ol samting bilong 'drilling' na 'mining'.

 

Olgeta bar i ken kam wantaimful trasebiliti(namba bilong hat, kemikel komposisen, 'tensile test', 'impact test', 'bend/rebend' na 'hardness') bihainim EN 10204 3.1/3.2.

 

 

 

 

Kain prodak	Sais ranj
Hot-rolim raunpela bar	5 – 360 mm
Flet bar	Bikpela 50 – 810 mm, bikpela 6 – 160 mm
Skwea bar	150 mm, 200 mm, 250 mm, 280 mm

 

Long sotpela tok bilong kisim ol samting,raunpela baret 12mmem i wanpela woksop sais bilong ol liklik 'shaft', 'pin', na 'bracket', taimraunpela ba R6planti taim ol i save yusim long ol sait lista long minimØ6 mm raunpela baret(sampela droing i yusim "R" olsem radius-so konfemim sapos R6 i min Ø6 o radius 6).

 

Ol raunpela sais (mm) we ol i save yusim long wokim ol masin na wokim ol samting:

 

Sais bilong raunpela baret (mm)	Ol i save yusim long sait (wok tru)
6 (R6) / 8 / 10	Ol liklik pin, ol samting bilong anka, ol lait braket, ol hap bilong jig
12 (raunpela baret 12mm) / 16 / 20	Ol jeneral 'shafts', 'sleeve', 'adapter', ol hap bilong stretim
25 / 30 / 40	Ol kapling, ol samting bilong draiv, ol hab we ol i wokim long masin
50 / 60 / 80	Hevi-pin, ol hap bilong maining we i no wok gut, ol 'forged blanks'
100+	Bikpela masin stok, ol samting we ol i wokim long laik bilong ol yet

 

 

 

Long MTC yu salim (Heat No. 0242306413 / 0242306412, dia. 27 mm × 6 m), ol i ripotim kemistri olsem:

 

Elemen	Test 1	Test 2	Yunit / toksave
C	0.33	0.34	% (x100 → 33 / 34)
Si	0.28	0.26	%
Mn	0.68	0.57	%
P	0.015	0.017	% (P i liklik tru, strongpela strong)
S	0.003	0.004	% (S i liklik tru, gutpela klinpela ples)
Cr	0.018	0.021	% (micro Cr)
Cu	0.009	0.005	%
V	0.063	0.066	% (micro-alloying bilong strongim)
Ti	0.042	0.043	% (grain refinement)
B	0.0030	0.0030	% (hardenability impruvmen)

 

Dispela i tokim yumi long wanem samting

Kabon klostu long 0.33-0.34% i givim gutpela balens bilong strong na strong bihain long QT.

P na S i liklik tru (Liklik o wankain olsem 0.017% na Liklik o wankain olsem 0.004%), we em i mak bilong ol spesel-stiel bar bilong ol mekanikel hap.

V, Ti na B i stap klia - dispela i no wanpela 'basic mild steel', tasol em i wanpela 'micro-alloyed' o HS (high-strength) bar we i lukluk long ol gutpela 'mechanical properties' na gutpela 'hardenability'.

Toksave long MTC i soim olsemCEV fomula:
CEV=C + Mn/6 + (Cr+V+Mo)/5 + (Cu+Ni)/15
we em i rot bilong bosim 'weldability' na 'cold-hevi bilong bruk. Dispela em i gutpela infomesen long putim long pes bikos em i toksave long ol enjinia na long Google olsem dispela em i trupela data.

 

 

Long de-i go long-de prokiumen,raunpela bar egensim stikem i save wanpelasaplaim-fom na kisimdistinksen na i no wanpela kemistri difrens.Raunpela bari min olsem stretpela-longpela, strongpela 'bar stock' we ol i save givim bilong wokim masin na 'forging', wediamita tolerans, stretpela, na kondisen bilong pesi save afektim stret taim bilong 'cycle' na 'scrap rate'. "Rod" planti taim ol i save yusim isi isi long ol liklik diamita na, i dipen long indastri, em i ken makim'coil-fed wire-rod forms(ol i wokim bilong droim, bendim, o pasim ol rot bilong waia) na i no long katim - longpela bar.

Wanpela gutpela rot bilong separetim ol em long lukluk long wanem samting i bikpela samting long kisim:

 

• Sapos yu nidimkatim-long-longpela ol blank bilong tanim/borim, yu save baimraunpela bar-yu bai tingimstretpela, 'decarb', ol hevi long pes, na wankain diamitaolsem na ol hap masin i klin.
• Sapos narapela step bilong yu emdroim/fomim(ol prodak bilong waia, ol spring, waia bilong pasim, prosesing bilong koil-), "rod" em i dispela tok ol i save yusim planti taim, na lukluk i go longfom bilong 'coil', 'surface scale control', na 'drawability'.

 

Tok ples bilong ol baia (i helpim long abrusim PO ambiguiti):

 

• Yusim"raunpela bar"taim BOM bilong yu i tingØ sais + longpela(olsem, Ø20 × 6 m) na wok bilong yu i go daun em wok bilong masin/wokim samting.
• Yusim"stik / waia stik"taim BOM bilong yu i tingkoil/weit-bes saplaina wok i go daun em long droim o wokim.

 

Gutpela tingting bilong baim samting:odaraunpela bartaim yu nidim ol 'machining stock' we yu ken save long en na stretpela 'straightness'; yusim "rod" wod tasol taim proses bilong yu i gat 'coil-fed droing, 'bending', o 'wire-based forming.

 

 

Long mekim pes i luk olsem i gat namba, em i helpim long soim trupela wok. Wanpela rot bilong ol dispela 'high-strongpela raunpela 'bar' em olsem:

a) Mekim ain na sekenderi rifaining
Ol i save meltim ain long BOF o EAF, na bihain ol i save tritim long LF/VD long rausim salfa na fosforas na stretim stret ol samting insait long en. Dispela em i hap we ol i save putim ol 'micro-alloying elements olsem V, Ti na B. Low P na S insait long MTC bilong yu (0.015–0.017% P, 0.003–0.004% S) em i stret tru long dispela step - ol i mekim strong na weldabiliti i kamap gutpela moa.

b) Kasting na redim 'billet'
Ol i save tromoi ain we ol i bin klinim i go insait long ol 'billet' we i gutpela long rolim ol raunpela 'bar'. Ol klinpela 'billet' we i no gat planti samting insait long en em i bikpela samting long winim ol 'bend/rebend' na 'impact' tes we i stap long setifiket bilong yu.

c) Hot roling bilong raunpela bar
Ol i save hatim gen ol 'billet' na tanim long ol 'bar mill' i go inap long laspela 'diameter' (eksampel, 27 mm). Ol i save bosim 'rolling' bilong kisim gutpela kwaliti bilong pes, stretpela na 'dimensional tolerance'. Ol i save katim ol 'bar' i go longpela bilong ol bisnis, planti taim 6 mita.

d) Hat tritmen (normalising o 'quenching' + 'temering')
Long kisim ol 'mechanical properties' we i stap long setifiket - tensil 950-960 MPa, givim samting olsem 905-915 MPa, 'impact energy' long -20 digri klostu long 100-110 J - ol i no larim ol 'bar' i stap "olsem hot rol". Ol i save kamap nomol o, planti taim long dispela strong level,i dai na i no strong tumas (Q&T).

Pasin bilong kilimi givim wanpela strongpela 'martensitic/bainitic' straksa.

Temperinglong stretpela tempereja i save kamapim bek 'ductility', i save mekim 'impact toughness' i kamap strong, na i save strongim 'microstructure'.
Dispela step em i samting we i mekim strong i go antap tasol i holim yet 'elongation' long 13-14% na 'reduction' bilong eria antap long 50%.

e) Stretim, katim na makim
Bihain long ol i mekim hat tritmen ol i stretim ol 'bar', katim i go long 6 mita (o ol narapela longpela), bungim na putim mak wantaim ol namba bilong hat.

f) Testing na setifikesen
Produsen i save mekim wok painimaut long ol kemikel, 'tensile test', 'impact test' long –20 digri, 'bend/rebend test', 'forging test' na 'hardness check' - olgeta kolum yu lukim long MTC. Taim olgeta i "kwalifait" tasol ol i save lusim ol 'bar'. Dispela i givim ol baia bilip olsem olgeta 'bundle' i inapim mak bilong masin we ol i wanbel long en.

 

 

 

Planti hevi bilong 'round bar steel' i no save kamap long 'quotetion sheet'-ol i save kamaplong 'lathe', bihain long 'heat treatment', o taim ol i bungim. Long ol projek we i yusim 'high-strength / micro-alloyed bar, Octal Pipe i lukluk long ol gutpela samting we i save makim sapos 'bar' i kamap wanpela gutpela hap o wanpela samting we i gat bikpela pe bilong wok gen:

 

Wanem samting i save rong long sait	Wanem samting yu mas makim (tokples bilong baia)	Wanem samting Octal Pipe i bosim long mil
Ol tul i bagarap o bruk pinis we ol i no ting bai kamap	Delivery kondisen + pes rikwaemen (hot-rolim / rausim skin / droim)	Rot bilong redim pes (olsem, rausim skin long hap we i gat nid) + stretim bilong daunim senis bilong masin
Dimensenel drif bihain long masin	Diamita tolerans + stretnes rikwaemen	OD/ovality + straightness sekim long mekim 'turning allowance' i stap klia
Bruk long taim bilong kol stat / taim bilong impak	Impakt eneji long wanpela tempereja (olsem, "CVN @ -20 digri")	Impak tes we i pas long hat/lot; rilis bihainim evidens bilong tes, i no tingting tasol
Hatim-tritim i no stret (strong tumas / malumalum tumas)	Heat tritmen stet (normalised / Q&T) + hatnes windo	Het-tritmen disiplin + hat verifikasen agensim windo we yu makim
Ol hait bagarap ol i painim leit	NDT skop sapos em i bikpela samting (UT long agrimen)	UT opsen bilong ol bikpela hap + ol rekot bilong stretim/re-tes we ol i ken bihainim

 

Long praktis, dispela i tanim "raunpela bar sais + gret" i kamap wanpelawok prodaksen input: 'bar' i kamap wantaim wanpela kondisen, 'machining behavior' we yu ken save long en, na 'release basis' we i wankain olsem wanem ol i kisim ol hap bilong en. Octal Pipe inap long sapotim 'lot-based traceability (heat number → test results) olsem na kisim inspeksen na daunstrim masin kwalifikesen i save muv hariap na i no gat ekstra sampling saikel.

 

 

Long wanem, dispela samting i bungimbikpela strong (≈950 MPa), gutpela 'ductility' (A ≈ 13–14%)nagutpela tru low-temperature impak eneji (araun long 100-110 J long -20 digri), ol i ken yusim long planti kain kain wok:

Ol samting bilong helpim wok maining, tanel na graun
Ol ston bolt, ol 'anchor rod', ol 'drill rod' na ol narapela hap we i mas wok long taim bilong kol o taim i gat bikpela hevi. Bikpela yield (≈910 MPa) na gutpela impak veliu i mekim bar i seif aninit long ol sok lod.

Oil na ges na ol samting bilong solwara
Konektim ol hap, ol 'flange', ol 'hub', ol 'shaft' na ol 'bracket' we i mas i gat liklik 'tempereture' (–20 digri o daunbilo). Ol liklik P/S level na ol tes we i stap long pepa i mekim isi long kisim ol projek long solwara na long solwara.

Ol hap bilong masin na pawa-ikwipmen
Ol 'shaft', 'axle', 'pin', 'gear' (bihain long ol i wokim moa masin o strongim pes bilong en), ol 'masin frame' na ol samting bilong 'transmission' we i nidim bikpela strong moa long ol nomol 'carbon steel'.

Ol samting bilong tren na hevi kar
Long hap we ol i nidim wankain kemistri, 'traceability' na 'weldability' (kontrolim CEV).

Forging stok na masin bar
Bikos kemistri i klin na straksa i gutpela, dispela 'bar' em i gutpela samting bilong wokim ol 'closed-die forgings o ol masin pat. Ol kastoma i ken 'forge' long 'shape' na holim yet 'mechanical level' bihain long 're-tempering.

Ol projek long ol ples we i kol
Impak eneji we i bin kamap long –20 digri long MTC i soim olsem ol dispela 'bar' inap long yusim long noten / low-temperature envairomen na i no gat 'brittle failure'.

 

Steinles Stiel Raunpela Bar

Long ol komponen we i gat korosen-, ol projek i ken makimsteinles stiel raunpela barna i no kabon/aloiraunpela ain-planti taim taim ol kemikel bilong waswas, wet bilong nambis, o klorait-bearing media i mekim 'coating-bes proteksen i no gutpela. Octal Pipe i ken kolim ol 'stainless round bar' samting wantaim ol 'alloy bar' paket olsem na ol baia i ken holim wanpela pepa set na wanpela sipmen plen. Ol 'stainless' we ol i save yusim em 304/304L bilong sakim 'corrosion' na 316/316L we ol i nidim 'chloride pitting margin'.

 

Kontektim nau

 

 

Samting	Diskripsen
Diamita	5 – 360 mm (hot-rolim); ol sais we ol i bin giamanim o ol i bin rausim skin bilong en sapos yu askim
Longpela	6 mita, 3-12 mita inap long stretim
Kondisen bilong deliveri	Olsem ol i bin rol, nomolais, Q&T
Ol standet we mipela i ken bihainim	GB/T, ASTM/AISI, EN, wok bilong wokim sip o droim ol kastoma
Ol pepa	Setifiket bilong tes bilong mil (kemistri + mekanik + impak), lista bilong putim ol samting insait long en, as bilong en
Inspeksen	Namba tri -pati (SGS / BV) i ken stretim pastaim long salim i go

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