Puas yog koj tab tom nrhiav rau cov kws tshaj lij kev taw qhia txog kev xaiv ntawmInconel 718 thiab 316 stainless hlaurau koj daim ntawv thov xav tau? Koj twb tuaj rau qhov zoo lawm. Raws li ib tug thawj coj ntawm cov khoom tshwj xeeb alloys nrog ntau tshaj 18 xyoo ntawm kev paub thiab kev ISO certification,GNEEmuab ob qho tib siInconel 718 thiab 316 stainless hlaucov khoom. Phau ntawv qhia no yuav muab cov ncauj lus kom ntxaws sib piv los pab koj xaiv cov khoom siv paub zoo raws li cov khoom siv kho tshuab, kev tiv thaiv corrosion, kub tsis kam, thiab tag nrho cov nqi ntawm cov tswv cuab.
Inconel 718 Vs Stainless hlau 316
Inconel 718 Vs Stainless hlau 316
Nyob rau hauv cov nqe lus ntawm siab -kub lub zog, corrosion kuj (tshwj xeeb tshaj yog nyob rau hauv high -kub ib puag ncig), thiab kev ntxhov siab heev daim ntaub ntawv, Inconel 718 ho outperforms stainless hlau 316, ua rau nws zoo tagnrho rau aerospace daim ntaub ntawv (xws li dav hlau cav). Txawm li cas los xij, 316 stainless hlau yog tus nqi ntau dua - siv tau, yooj yim rau kev ua, thiab ua tau zoo nyob rau hauv tsawg corrosive marine ib puag ncig los yog khoom noj khoom haus- qib kev siv, muab qhov zoo sib npaug ntawm corrosion kuj thiab qis nqi. Inconel 718, ntawm qhov tod tes, yog npib tsib xee premium-raws li superalloy siv rau cov mob hnyav.
Dab tsi yog qhov tsis zoo ntawm Inconel 718?
Disadvantages thiab Alternatives ntawm Inconel 718
Txawm hais tias nws cov khoom zoo heev thiab kev tiv thaiv corrosion, Inconel 718 kuj muaj qee qhov tsis zoo: Tus nqi: Vim nws txoj kev tsim khoom nyuaj, Inconel 718 yog kim. Nyuaj rau lub tshuab: Nws cov hardness siab ua rau cov khoom tshem tawm nyuaj thiab ua kom cov cuab yeej hnav.
1. Cov ntsiab lus tseem ceeb: Qhov sib txawv ntawm Inconel 718 thiab 316 Stainless Steel
Txawm hais tias ob qho tib si Inconel 718 thiab 316 stainless hlau muaj qhov zoo corrosion kuj, muaj qhov sib txawv hauv lawv cov tsev neeg hlau, ntxiv dag zog rau cov txheej txheem, thiab cov yam ntxwv ua haujlwm.
Qauv Zauv: Inconel 718Kev nag lossis daus -nickel hardened-raws li superalloy. Los ntawm kev ntxiv cov ntsiab lus xws li txhuas, titanium, thiab niobium, thiab kev kho cua sov hauv kev laus kom precipitate ntxiv dag zog rau theem (' thiab '' theem), nws ua tiav lub zog siab heev thiab zoo heev - kub ua haujlwm. Nws yog cov khoom txiav -ntev tsim rau huab cua siab heev - kub thiab siab - ib puag ncig kev ntxhov siab.
316 Stainless hlau:Ib qho austenitic chromium-nickel- molybdenum stainless hlau. Nws cov corrosion kuj yog feem ntau yog muab los ntawm ib tug passivation zaj duab xis tsim los ntawm chromium, thiab nws lub zog yog tau los ntawm cov khoom siv ntxiv zog. Nws yog ib qho ntawm cov khoom siv dav tshaj plaws thiab raug nqi -cov khoom siv hluav taws xob zoo rau corrosion- cov ntawv siv tiv taus, tab sis nws lub zog txo qis thaum kub kub.
Inconel 718 thiab 316 Stainless hlau yeeb nkab
2. Kev sib piv ntawm cov tshuaj muaj pes tsawg leeg thiab cov txheej txheem ntxiv dag zog ntawm Inconel 718 thiab 316 stainless hlau
| Element | Inconel 718 Hom (%) | Stainless hlau 316 Hom (%) | Lub luag haujlwm tseem ceeb thiab qhov sib txawv Analysis |
|---|---|---|---|
| Hlau (Fe) | Tshuav | Tshuav | Ob leeg muaj Fe hauv lawv cov matrix, tab sis 718 muaj qhov qis dua, muab nws lub zog nickel ntau dua - tus cwj pwm. |
| Nickel (Ni) | 50 – 55 | 10 – 14 | Qhov tseem ceeb sib txawv.Cov ntsiab lus Ni siab heev hauv 718 yog lub hauv paus rau nws qhov kev ua tau zoo siab - qhov kub thiab txias, tiv thaiv kom tsis txhob muaj xov xwm, thiab kev ntxhov siab corrosion cracking kuj. |
| Chromium (Cr) | 17 – 21 | 16 – 18 | Ob leeg muab oxidation thiab corrosion kuj. Cov ntsiab lus zoo sib xws. |
| Molybdenum (hli) | 2.8 – 3.3 | 2.0 – 3.0 | Txhim khu kev tiv thaiv pitting thiab crevice corrosion. Ob leeg muaj Mo, nrog 718 me ntsis siab dua. |
| Niobium + Tantalum (Nb + Ta) | 4.75 – 5.5 | – | Qhov tseem ceeb sib txawv.Cov ntsiab lus tshwj xeeb ntxiv dag zog hauv 718, tsim ″ theem, uas yog lub hauv paus ntawm nws cov ultra-siab zog. 316 tsis muaj. |
| Aluminium (Al) | 0.2 – 0.8 | – | Qhov tseem ceeb sib txawv.Cov ntawv ′ txhawb nqa theem hauv 718. 316 tsis muaj. |
| Titanium (Ti) | 0.65 – 1.15 | – | Qhov tseem ceeb sib txawv.Txhim kho 718 ua ke nrog Niobium. 316 tsis muaj. |
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.08 | Tsawg dua lossis sib npaug li 0.08 | Ob leeg tswj cov ntsiab lus C tsawg los txhim kho corrosion kuj thiab weldability. |
| Manganese (Mn) | Tsawg dua los yog sib npaug li 0.35 | Tsawg dua los yog sib npaug rau 2.0 | 316 muaj Mn cov ntsiab lus siab dua, ua raws li austenite stabilizer thiab txhim kho kev ua haujlwm kub. |
Strengthening Mechanisms Summary :
Qauv Zauv: Inconel 718Precipitation hardening (hnub nyoog hardening). Ultra- lub zog siab yog ua tiav los ntawm kev kho cua sov.
Stainless hlau 316:Kev daws teeb meem ntxiv dag zog. Lub zog feem ntau yog nce los ntawm kev ua haujlwm txias thiab tsis tuaj yeem txhim kho tau zoo los ntawm kev kho cua sov.
3. Kev sib piv ntawm cov khoom siv kho tshuab ntawm 718 alloy thiab 316 stainless hlau ntawm chav tsev kub thiab kub kub
| Performance Indicator | Inconel 718 (Kev daws teeb meem & Hnub nyoog) | Stainless hlau 316 (Annealed) | Stainless hlau 316 (Cold ua hauj lwm) | Kev sib piv |
|---|---|---|---|---|
| Chav Kub Kub Tensile Strength | Ntau dua lossis sib npaug li 1275 MPa | Ntau dua lossis sib npaug li 515 MPa | Txog li ~ 1000 MPa | Lub zog ntawm 718 yog ntau tshaj 2.5 npaug ntawm annealed 316 thiab tseem tseem ceeb dua txawm tias piv rau txias - ua haujlwm 316. |
| Chav ntsuas kub tawm lub zog (0.2% Offset) | Ntau tshaj lossis sib npaug rau 1035 MPa | Ntau dua lossis sib npaug li 205 MPa | Txog li ~ 800 MPa | Lub zog tawm los ntawm 718 yog 5 npaug ntawm annealed 316, tso cai rau cov phab ntsa nyias nyias thiab txo qhov hnyav. |
| Chav ntsuas kub Elongation | Ntau dua lossis sib npaug li 12% | Ntau dua lossis sib npaug li 40% | Ntau dua lossis sib npaug li 10% | Annealed 316 muaj ductility zoo heev; 718 tuav cov khoom tsim nyog ntawm ultra- qib siab zog. |
| Qhov Kev Pab Cuam Siab Tshaj Plaws Tshaj Plaws | ~ 700℃(nruam) | ~ 800℃(nruab nrab), tab sis muaj zog poob. | Qhov txawv tseem ceeb:Lub zog ntawm 316 poob siab tshaj 450 degree, thaum 718 khaws lub zog siab ntawm 700 degree. | |
| Yield zog ntawm 600 degree | ~ 700 MPa | < 100 MPa | Ntawm qhov kub thiab txias, lub zog zoo ntawm 718 yog los ntawm ib qho ntawm ntau zaus. |
4. Kev sib piv ntawm corrosion kuj ntawm Inconel 718 thiab stainless hlau 316
Ob leeg muaj npe nrov rau kev tiv thaiv corrosion, tab sis muaj qhov sib txawv.
| Corrosive Ib puag ncig | Inconel 718 Kev ua haujlwm | Stainless hlau 316 kev ua haujlwm | Kev Ntsuam Xyuas & Kev Pom Zoo |
|---|---|---|---|
| General Atmosphere, Dej Ntshiab | Zoo heev | Zoo heev | Ob leeg yog tsim nyog; 316 yog thawj qhov kev xaiv raws li tus nqi. |
| Chloride Ib puag ncig (Seawater, Brine) | Zoo heev.Cov ntsiab lus siab nickel muab qhov tshwj xeeb tiv thaiv rau Chloride Stress Corrosion Cracking (SCC). | Zoo, tab sis nrog kev pheej hmoo. In hot, concentrated chloride solutions (e.g., >60 degree), pitting thiab SCC yuav tshwm sim. | Rau cov dej hiav txwv tseem ceeb lossis cov xov xwm uas muaj chlorine, 718 ua tau zoo dua li 316. |
| Dilute sulfuric acid, phosphoric acid | Zoo rau Excellent | Zoo | Ob qho tib si tau txais ntawm qhov kub thiab txias thiab qis concentration. Qhov zoo ntawm 718 yuav tshwm sim nrog nce concentration thiab kub. |
| Hydrochloric acid | Kev txwv tsis pub dhau (tau txais hauv cov tshuaj dilute heev). | Tsis tiv taus. | Tsis pom zoo rau kev pabcuam hydrochloric acid. Alloys xws li Hastelloy yuav tsum tau xaiv. |
| Nitric Acid | Zoo heev | Zoo heev | Ob leeg yog cov khoom siv zoo heev rau cov khoom siv nitric acid. |
| Kev kub siab oxidation | Zoo heev (txog 1000 degree) | Zoo (txog ~ 800 degree, tab sis raug oxidation loj thiab scaling) | Nyob rau hauv qhov kub-kub oxidizing ib puag ncig, kev pab cuam lub neej thiab kev ruaj ntseg ntawm 718 deb tshaj li ntawm 316. |
| Sour Service (nrog H₂S/CO₂) | Zoo heev.Yuav ua kom zoo dua los ntawm kev kho cua sov rau Sulfide Stress Cracking (SSC) tsis kam. | Tsis pom zoo.Ua tau zoo heev rau Sulfide Stress Cracking nyob rau hauv qaub ib puag ncig. | Cov ntaub ntawv ntawm qib 718 yog qhov yuav tsum tau ua rau cov roj qaub & roj ib puag ncig; kev siv ntawm 316 yog txwv tsis pub. |
5. Kev sib piv ntawm machining, vuam, thiab kev kho cua sov
| Txheej txheem | ib 718 | Stainless hlau 316 | Qhov Tseem Ceeb Qhov Sib Txawv & Kev Sib Tw |
|---|---|---|---|
| Tshuab dhos | Cov khoom siv tsis yooj yim rau tshuab. High hardness, hnyav ua hauj lwm hardening, ceev cov cuab yeej hnav. Yuav tsum tau siv cov cuab yeej tshwj xeeb, tsis tshua muaj kev nrawm nrog kev txiav hnyav, ua kom txias txaus. | Keej yooj yim rau tshuab. Pom tau tias yog ib qho ntawm cov khoom siv ntau tshaj plaws stainless hlau. | Machining tus nqi thiab lub sijhawm rau 718 yog ntau dua li ntawm 316. |
| Txias txoj kev | Ua tau nyob rau hauv cov kev daws teeb meem-kho, tab sis nthuav tawm qhov tseem ceeb springback, xav tau cov cuab yeej ntau dua. | Zoo heev formability. Haum rau stamping, sib sib zog nqus nqus, raj dabtsi yog khoov, thiab lwm yam kev ua haujlwm nyuaj. | Lub formability ntawm 316 yog qhov tseem ceeb tshaj ntawm 718. |
| Vuam | Weldability zoo (rau nag lossis daus-hardenable alloy). Yuav tsum tau muab cov hlau sib txuam (xws li ERNiFeCr‑2), thiab kev kho mob tom qab vuam yog qhov tseem ceeb los kho cov khoom. | Weldability zoo heev. Ib qho yooj yim weldable stainless hlau; Kev kho cua sov tom qab vuam feem ntau tsis tas yuav tsum tau ua. | Cov txheej txheem vuam rau 718 yog qhov nyuaj dua thiab raug nqi, thiab kev kho cua sov tom qab vuam yog qhov tseem ceeb. |
| Kev kho cua sov | Cov txheej txheem yog complex thiab tseem ceeb heev. Yuav tsum tau txais kev kho qhov tseeb ua raws li ob-kauj ruam kev laus kom ua tiav lub hom phiaj. | Feem ntau tsuas yog yuav tsum tau daws cov tshuaj annealing los txo cov kev ntxhov siab thiab txhim kho corrosion kuj; txheej txheem yog yooj yim. | Kev kho cua sov yog qhov tseem ceeb rau cov khoom ntawm 718 thiab yog qhov tseem ceeb ntawm nws cov nqi thiab lub sijhawm ua haujlwm. |
Thov hu rau peb, thiab peb yuav muab kev sab laj txog kev xaiv cov khoom pub dawb rau koj, cov ncauj lus kom ntxaws txog tus nqi -cov txiaj ntsig kev txheeb xyuas, thiab nqe lus rauInconel 718 thiab 316 stainless hlaukom ua tau raws li koj qhov project tshwj xeeb.
