Peb cov Duplex Stainless Steel Bolts muaj zog ob npaug ntawm 316 SS thaum tiv taus chloride tawm tsam. Nrog 22% chromium, 5% nickel, thiab 3% molybdenum (raws li ASTM A276), lawv ua tiav PREN tus nqi >35 - tau ua pov thawj tias tiv taus 100,000+ ppm chlorides hauv ASTM G48 kev sim.
Cov taub hau forged txias muab 750 MPa tensile zog (dhau ASME SA320 L43 qhov yuav tsum tau ua), zoo meej rau cov platforms offshore uas cov ntsev tsuag tua cov bolts txheem. Cov ntawv ceeb toom sab nraud qhia <0.01mm / xyoo pitting hauv dej hiav txwv ntawm 30 ° C. Koj yuav tau txais 2x lub neej ntawm 316 fasteners hauv cov nroj tsuag ua tshuaj thaum txuag 25% piv rau super duplex xaiv.
Peb muaj ob qhov tiav: passivated (raws li ASTM A967) los txhawb kev tiv taus corrosion, tsim ib txheej oxide 7-9μm, thiab sandblasted (Ra 25-50μm) rau kev nplaum xim zoo dua hauv cov haujlwm sab nraum zoov. Cov txheej txheem passivation tshem tawm cov hlau dawb, ua rau lawv tiv taus chloride corrosion 35% ntau dua li cov bolts tsis kho.
Ua ib lub tuam txhab tsim khoom hauv Suav teb uas muaj 10 xyoo xa khoom rau EU offshore thiab chemical industries, peb khiav 5 duplex-specific cold heading lines thiab 7 thread rollers, tsim tau 3,800 tons txhua xyoo. Peb cov khoom siv raw dhau los ntawm cov txheej txheem annealing tshwj xeeb kom tswj tau 50-50 ferrite/austenite sib npaug, kuaj xyuas los ntawm peb lub tshuab ntsuas magnetic hauv tsev (qhov tseeb ± 1%).
Peb khaws 220-350 tons hauv Tshuag ntawm peb lub tsev rau khoom Qingdao, npog qhov loj me ntawm ¼" txog 2" thiab ntev 1" txog 20". Kev hloov kho cov khoom muag hauv lub sijhawm tiag tiag ntawm peb lub vev xaib, thiab FOB Qingdao cov khoom xa tuaj rau cov bolts hauv Tshuag tawm hauv 5 hnub - yooj yim thaum koj cov neeg siv khoom xav tau khaws cov haujlwm raws sijhawm.
Cov xaj tshaj 45 tons tau txais luv nqi 5.5%, ntxiv rau passivation dawb thiab 15% ntawm kev thauj khoom hiav txwv.
Nov yog peb qhov kev lav: Yog tias muaj Duplex Stainless Steel Bolts ua tsis tau raws li ASTM A193 cov qauv kho tshuab lossis qhia txog kev xeb pitting hauv 8 xyoo, peb yuav hloov lawv hauv 6 hnub thiab rov qab them tag nrho cov nqi xa khoom. Peb kuj muab 35-hnub xauv tus nqi rau cov xaj uas tau lees paub, nrog rau 2% luv nqi rau cov neeg siv khoom uas rov xaj dua hauv 3 lub hlis.
Super Duplex Stainless Steel S31803 (UNS S31803; sib npaug rau 2205, DIN 1.4462)
Cov Tshuaj Sib Xyaws
Cr: 21.0-23.0%, Ni: 4.5-6.5%, Mo: 2.5-3.5%, N: 0.08-0.20%, C: ≤0.03%, Mn: ≤2.0%, Si: ≤1.0%, P: ≤0.03%, S: ≤0.02%
Cov Khoom Siv Kho Tshuab
Lub Zog Tensile: ≥690 MPa
Lub Zog Yield: ≥450 MPa
Kev Nyuaj: ≤290 HB (Brinell); ≤31 HRC (Rockwell)
Kev Ntev: ≥25%
Kev Tiv Thaiv Kev Xeb
Kev tiv thaiv zoo heev rau kev xeb ntawm qhov pitting, crevice corrosion, thiab kev ntxhov siab corrosion cracking (SCC) hauv cov chaw muaj chloride ntau (piv txwv li, dej hiav txwv, brines). Zoo dua li 316/316Ti hauv cov tshuaj lom neeg hnyav.
Qhov Kub Ntau
Kev pabcuam tas mus li: -50°C txog 250°C (txwv los ntawm kev ductility ntawm qhov kub siab); zoo tagnrho rau cov chaw nyob hauv dej hiav txwv thiab offshore.
Cov Khoom Siv Sib Nqus
Sib Nqus (vim yog ob lub qauv me me: austenite + ferrite)
Qhov Loj Metric (M)
Qhov Ntev ntawm Xov (mm)
Qhov Dav ntawm Lub Taub Hau Hex (mm)
Qhov Siab ntawm Lub Taub Hau Hex (mm)
Qhov Ntev (mm)
Qhov Sib Npaug ntawm Imperial
Hom Xov (Imperial)
UNC (3/16"-24), UNF (3/16"-32)
UNC (5/16"-18), UNF (5/16"-24)
UNC (3/8"-16), UNF (3/8"-24)
UNC (1/2"-13), UNF (1/2"-20)
UNC (5/8"-11), UNF (5/8"-18)
Kev Ua Raws Cai Txheem
Cov Ntawv Thov Tseem Ceeb
ASTM A193 B8S, ISO 4017, DIN 933
Cov roj thiab roj av hauv hiav txwv Cov platforms (cov kav dej hauv qab dej hiav txwv, cov qhov dej)
Cov chaw tsim dej ntsev (cov tshuab osmosis rov qab)
Kev ua tshuaj lom neeg (cov kua qaub, chlorides, thiab cov slurries corrosive)
Kev tsim kho dej hiav txwv (lub cev nkoj, cov ncej kiv cua)
Kev lag luam pulp thiab ntawv (cov tshuab bleaching nrog cov tshuaj chlorine)
S31803 (2205)
Siab (lub zog tso zis 2 × ntawm 316Ti)
Kev Tiv Thaiv Chloride
Zoo heev (tiv taus dej hiav txwv/SCC)
Zoo (tab sis txwv rau cov chloride ntau)
Kev sib txuas tau
Zoo (yuav tsum tau tswj cov cua sov kom tsis txhob muaj kev tsis sib npaug ntawm ferrite/austenite)
Siab dua (premium rau duplex microstructure)
Cov Lus Nug Feem Ntau
Q: Koj txoj cai rau kev xa rov qab lossis hloov khoom yog dab tsi?
A: Yog tias cov khoom muaj teeb meem zoo los ntawm peb, peb yuav npaj cov khoom hloov lossis rov qab them nyiaj hauv 30 hnub tom qab tau txais.
Q: Koj puas muab tau daim ntawv pov thawj ntawm lub hauv paus chiv keeb (CO) rau kev tshem tawm kev lis kev cai?
A: Yog, peb tuaj yeem muab CO, nrog rau lwm cov ntaub ntawv xws li cov ntawv xa khoom lag luam thiab cov npe ntim khoom uas xav tau rau kev lis kev cai.
Q: Peb yuav taug qab cov khoom xa tuaj li cas tom qab xa tawm lawm?
A: Peb yuav muab tus lej taug qab thiab cov ntaub ntawv platform logistics thaum cov khoom xa tuaj tawm mus, yog li koj tuaj yeem tshawb xyuas qhov xwm txheej tam sim ntawd.
Q: Koj puas muab kev pab txhawb nqa rau kev teeb tsa lossis siv cov khoom?
A: Yog, peb pab neeg ua haujlwm tuaj yeem muab cov lus qhia txog kev teeb tsa, cov yeeb yaj kiab qhia, lossis kev txhawb nqa hauv tsev yog tias xav tau.
