ER308L thiab ER308LSi yog ob qho tib si ustenitic stainless hlau cov hlau ua rau vuam cuab yeej siv rau kev tsim 304 stainless nyob rau hauv er308lsi. Cov kev sib txawv no ua txhua qhov zoo dua rau kev siv vuam vuam. Hauv qab no yog cov ncauj lus kom ntxaws tawg ntawm lawv qhov txawv, los ntawm cov tshuaj pleev rau cov ntawv thov.
Cov tseem ceeb: Cov ntsiab lus Silicon
Cov lus tseem ceeb ntawm lawvSilicon (Si) Cov Ntsiab Lus{{0 {}}} Qhov tseem ceeb tshaj plaws kev sib txuam uas cuam tshuam weldability thiab fluidity.
| Yam zoo | Er308l | Er308lsi |
|---|---|---|
| Silicon Cov Ntsiab Lus | 0.30-0.90% (Per AWS A5.9 Cov Qauv) | 0.60-1.00% (Ntau dua, txhob txwm ntxiv) |
| HOM PHIAJ LOS NTAWM SILICON | Deoxidation me me thiab kev txhawb nqa | Txhim Kho Deasoxidation thiab Feld Pa Faib Kab |
Silicon Hloov Kev Ua Haujlwm
Silicon ua li deoxidizer (tshem tawm cov oxygen los ntawm Weld pas dej los ua kom txhob pancos) thiab txhim kho cov ntws ntawm cov hlau molten. Qhov siab dua silicon hauv er308LSI tsim cov kev sib txawv hauv kev sib tw sib tw:
1. Weld Pas Dej
Er308l: Muaj FLUCERATION FLU. Lub pas dej Weld yog tsawg dua "los ua kom muaj txiaj ntsig rau ntsug lossis siv ua haujlwm vuam muag, qhov chaw tswj cov chav ua haujlwm txav.
Er308lsi: Figh fluidity siab dua. Cov hlau molten ua kom yooj yim dua, ua rau nws zoo tagnrho rautiaj lossis kab rov tav vuam(Xws li, cov vaj huam sib luag loj lossis cov kav dej hauv cov haujlwm ruaj). Nws ua qhov khoob hauv pob qij txha ua ke yooj yim dua, txo qhov kev pheej hmoo ntawm kev ua tsis tiav fusion fusion.
2. Deoxidation thiab Porosity Kuj
Oxygen daig hauv chav Weld ua rau porosity (me me roj npuas), tsis muaj zog ntawm kev sib koom ua ke. Silicon khi nrog oxygen los ua cov tshuaj tsis muaj mob oxides uas ntab rau lub ntsej muag swb, txo porosity:
Er308l: Ua tau Deoxidation txaus rau kev ua kom huv thiab tswj cov chaw ib puag ncig (piv txwv li, sab hauv qab covrication nrog qhov tsis huv tsawg).
Er308lsi: Superior deoxidation. Cov khoom sillicon ntxiv me me ntawm cov khoom qias neeg me me (piv txwv li cov roj muaj xeb, ua kom muaj kev zam txim ntau rau kev kho cov pa lossis qis {} npaj pob qij txha.
3. Arc stability thiab ci
Er308l: Tsim cov arc ruaj khov tab sis tuaj yeem tsim kom muaj kev sib tw me dua yog tias cov roj thaiv npog (piv txwv li cov nqi tsawg).
Er308lsi: Cov silicon ntau ruaj khov lub arc, txo kev sib luag -} Txawm hais tias muaj peev xwm sib txuas lus ntxiv (ib txwm muaj nyob sab nraum zoov lossis portable vuam teeb). Qhov kev ua tau zoo li cov ntawv ntxhua khaub ncaws huv uas xav tau tsawg tshaj tawm- weld tu.
Lwm cov khoom lag luam
Thaum ob qho tib si Match 308L cov tub ntxhais tseem ceeb (chromium: 18-20%, ER308LSI yuav muaj kev hloov kho me ntsis kom sib npaug ntawm silicon siab dua:
Tus kws dai txiv manganese: Feem ntau siab dua hauv er308lsi (txog 2.5% vs. 2.0}}% hauv erc ruaj khov yam tsis muaj kev cuam tshuam corrosion.
Lwm yam kab kawm: Ob qho tib si ntsib txoj kev txwv nruj rau cov leej faj, phosphorus, thiab nitrogen kom tsis txhob muaj brittleness lossis txo corrosion tsis kam.
Corrosion Kuj: Qhov tseem ceeb sib npaug
Txawm hais tias Silicon qhov sib txawv, ob lub pas nrig tswj hwm corrosion tsis kam:
Ob qho tib si yog "L" (tsawg dua carbon), tsawg dua los yog sib npaug rau 0.03%), yog li lawv tiv taus cov dembide tsim hauv 304 stainless hlau welds.
Silicon tsis ua kom muaj kev phom sij hauv ib puag ncig (piv txwv li, dej, me acids, lossis atmospheric raug). Rau cov chaw corrosive heev (piv txwv li, qab ntsev), thiab tsis zoo tshaj plaws - Ed316L (nrog Molybdenum) yog nyiam dua.
Uas xaiv? Cov Kev Lom Zem
Xaiv raws li koj txoj haujlwm vuam, npaj kev sib koom, thiab khoom siv:
Xaiv er308l yog:
VACE vuam lossis cov laus lossis nyiaj siv ua haujlwm (xav kom txo qis kom muaj kev tiv thaiv kom tiv thaiv cov weld pas dej ntawm sagging).
Ua haujlwm nrog meticulously ntxuav cov cuab yeej siv ua ke (tsis muaj cov paug saum npoo av).
Ua ntej tshaj tawm minoy ntxiv ntxiv (piv txwv li, hauv cov ntawv thov tshwj xeeb uas tsis siv kev tswj chemistry nruj).
Xaiv er308lsi yog:
Vuam tiaj tiaj lossis kab rov tav tav (cov txiaj ntsig los ntawm kev kub siab dua rau kev sib txawv zoo dua).
Ua haujlwm nrog me ntsis tsis huv lossis npaj ua haujlwm tsis zoo ntawm cov hlau (xws li, lub teeb xeb, zeb nplai).
Siv cov teeb tsa lossis sab nraum zoov (arc ruaj khov thiab muaj teeb meem tsis muaj ntau ntxiv).
Kev Tshawb Nrhiav Sai Tshaj Tawm - Weld Tryup (Tsawg Zog= tsis muaj kev sib tsoo).
Lub ntsiab
ER308L thiab ER308LSI yog ze li ntawm kev ua kom zoo ib yam thiab sib xyaw nrog 304 stainless hlau, tab sis ER308LSI'sSiab dua silicon cov ntsiab lusTxhim kho weldability: nws txhim kho fwjyce, arc stability, thiab deoxidation, thaum txo lub ntsej muag. Siv ER308L rau ntsug / ua haujlwm hauv av vuam lossis tswj cov kev tswj chemistry; Xaiv rau ER308LSi rau kev ua haujlwm tiaj / kab rov tav, cov hlau tsis huv, lossis sab nraum zoov. Ob qho tib si xa kom txhim khu kev qha, xeb {{}} tiv taus welds {}} nrog rau "Variant Prefiant Preasing yooj yim siv.
