Q345B welded steel yeeb nkab loj txoj kab uas hla kauv yeeb nkab piav qhia
Q345B kauv yeeb nkab yog kauv seam steel yeeb nkab ua los ntawm sawb steel coils los ntawm chav kub extrusion thiab automated ob -hlau ob -sided submerged arc vuam. Nws qhov kev tsim khoom suav nrog cov theem tseem ceeb xws li kev tshuaj xyuas cov khoom siv raw, kev tsim thiab vuam, thiab tsis yog- kev kuaj kev puas tsuaj, suav nrog kev kho kab mob, kev sib txuas ntawm vuam, sab hauv thiab sab nraud submerged arc vuam, thiab kev kuaj ultrasonic, kom ntseeg tau cov vuam zoo thiab cov yeeb nkab ua haujlwm. Cov khoom tiav yuav tsum tau kuaj xyuas hydrostatic thiab beveling ua ntej muab tso rau hauv kev siv, ua tau raws li tag nrho cov qauv tsim nyog.
Chemical Composition Table (Melting Analysis, %)
| Element | Qhov yuav tsum tau muaj (GB/T 1591-2018) | Tus nqi (Reference) |
|---|---|---|
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.20% | 0.15~0.18% |
| Silicon (Si) | Tsawg dua lossis sib npaug li 0.55% | 0.20~0.40% |
| Manganese (Mn) | 1.00~1.60% | 1.20~1.50% |
| Phosphorus (P) | Tsawg dua los yog sib npaug0.035% | Tsawg dua lossis sib npaug li 0.025% |
| Sulfur (S) | Tsawg dua los yog sib npaug0.035% | Tsawg dua lossis sib npaug li 0.020% |
| Vanadium (V) | 0.02 ~ 0.15% (yeem) | 0.03~0.08% |
| Niobium (Nb) | 0.015 ~ 0.060% (yeem) | 0.02~0.04% |
| Carbon sib npaug (Ceq) | Tsawg dua los yog sib npaug0.44%(Ceq=C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15) | 0.38~0.42% |
Kauv Welded Pipe Performance (GB/T 9711-2017 PSL1/L245)
| Khoom | Kev xav tau | Txoj Kev Xeem |
|---|---|---|
| Tensile zog (Rm) | 460 ~ 670 MPa | API 5L Annex H |
| Yield zog (Rt0.5) | Ntau dua lossis sib npaug rau 245 MPa (L245 qib) | API 5L Annex H |
| Flattening Test | Tsis tawg ntawm 80% D | API 5L Annex D |
| Impact Test (0 degree) | Ntau dua lossis sib npaug rau 27J (weld / HAZ / puag) | ASTM A 370 Cov Lus Qhia Tshwj Xeeb |
| Hydrostatic Test | Ntau dua lossis sib npaug rau 95% SMYS rau 5 ~ 10 sec | API 5L Annex F |
| Hardness (HV10) | Tsawg dua lossis sib npaug rau 248 (Carbon steel) | ISO 6507-1 |
Txheej txheem ntau lawm
(1) Cov khoom siv raw, xws li steel strip coils, welding hlau, thiab flux, raug kuaj xyuas lub cev thiab tshuaj lom neeg ua ntej siv.
(2) Qhov kawg ntawm cov hlau sawb yog pob tw -welded siv ib zaug - hlau los yog ob npaug - hlau submerged arc vuam. Tom qab tau dov rau hauv cov kav hlau, tsis siv neeg submerged arc vuam yog siv rau kev sib txuas ntxiv.
(3) Ua ntej kev tsim, cov hlau sawb tau nce qib, ntug trimming, ntug planing, deg tu, conveying, thiab pre-bending.
(4) Lub siab ntawm lub tog raj kheej hydraulic ntawm ob sab ntawm lub conveyor yog tswj los ntawm hluav taws xob tiv tauj lub ntsuas ntsuas kom ruaj khov ntawm cov hlau sawb.
(5) Sab nraud lossis sab hauv kev tswj cov menyuam txoj kev yog siv.
(6) Cov khoom siv vuam sib txawv yog siv los xyuas kom meej tias qhov sib txawv ntawm qhov vuam ua tau raws li qhov xav tau ntawm vuam. Cov yeeb nkab txoj kab uas hla, misalignment, thiab weld gap yog tag nrho cov tswj nruj me ntsis.
(7) Ob sab hauv thiab sab nraud vuam siv Lincoln Electric vuam tshuab los ntawm Teb Chaws Asmeskas rau ib leeg - hlau los yog ob npaug - hlau submerged arc vuam kom tau txais cov khoom siv vuam ruaj khov. (8) Tag nrho cov welds raug tshuaj xyuas los ntawm kev siv online txuas ntxiv ultrasonic flaw detector, kom ntseeg tau 100% tsis yog -kev kuaj kev puas tsuaj ntawm cov kauv welds. Yog tias pom muaj teeb meem, lub tswb tsis siv neeg tau tshwm sim thiab lub cim raug txau, tso cai rau cov neeg ua haujlwm tsim kho cov txheej txheem tsis raug thiab tshem tawm qhov tsis xws luag tam sim ntawd.
(9) Cov kav hlau hlau raug txiav mus rau hauv ib qho chaw siv lub tshuab cua plasma.
(10) Tom qab txiav mus rau hauv ib tus kav dej, thawj peb lub kav dej ntawm txhua pawg tau txais kev nruj nruj ua ntej- dhau qhov kev tshuaj xyuas. Qhov no suav nrog kev tshuaj xyuas cov khoom siv hluav taws xob, tshuaj lom neeg muaj pes tsawg leeg, kev sib xyaw ua ke, qhov zoo ntawm qhov vuam, thiab tsis yog -kev sim ua kom puas tsuaj los xyuas kom meej tias cov txheej txheem tsim cov yeeb nkab yog raws li tus qauv ua ntej kev tsim khoom pib.
(11) Cov cheeb tsam uas muaj kev tshawb nrhiav tsis tu ncua ultrasonic qhov tsis zoo ntawm qhov vuam raug tshuaj xyuas manually siv ultrasonic thiab X- txoj kab hluav taws xob. Yog tias pom muaj qhov tsis xws luag, lawv raug kho thiab rov qab- tshuaj xyuas siv tsis yog- kuaj kev puas tsuaj kom txog rau thaum cov khoom tsis raug lees paub tias yuav raug tshem tawm.
(12) Tag nrho cov pob tw welds ntawm lub sawb hlau thiab cov kav dej uas muaj T- cov kev sib tshuam nrog cov kauv welds raug tshuaj xyuas siv X-ray TV lossis radiography. (13) Txhua cov yeeb nkab steel tau dhau los ntawm kev ntsuas hydrostatic siab, nrog radial sealing thov. Kev ntsuas siab thiab lub sij hawm yog tswj hwm los ntawm lub khoos phis tawj - tswj kev ntsuas dej siab siab. Cov ntsuas ntsuas tau raug luam tawm thiab kaw.
(14) Cov yeeb nkab kawg yog machined los xyuas kom meej tswj qhov kawg lub ntsej muag perpendicularity, bevel kaum sab xis, thiab blunt ntug.
Kev kuaj thiab tshuaj xyuas
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