Paub meej Chemical Composition Range ntawm Incoloy 800
Incoloy 800 yog npib tsib xee-hlau-chromium austenitic alloy, uas nws cov tshuaj muaj pes tsawg leeg yog nruj me ntsis raws li thoob ntiaj teb specifications xws liASTM B 409 Cov khoom lag luam(rau daim ntawv, daim ntawv, thiab sawb),ASTM B 408 Cov khoom siv(rau cov tuav thiab forgings), thiabUNS N08800. Cov ntsiab lus ntxaws ntxaws ntawm nws cov ntsiab lus tseem ceeb (xws li npib tsib xee, chromium, hlau, carbon, manganese, thiab lwm yam) tau txhais raws li hauv qab no, nrog rau tag nrho cov txiaj ntsig tau qhia hauvQhov hnyav (wt%):
| Element | Cov ntsiab lus ntau (wt%) | Lub luag haujlwm tseem ceeb hauv Alloy |
|---|---|---|
| Nickel (Ni) | 30.0 – 35.0 | Cov tub ntxhais austenite-stabilizing keeb. Nws txhim kho cov alloy siab siab -kub creep kuj, toughness, thiab corrosion kuj nyob rau hauv txo qhov chaw. Cov ntsiab lus npib tsib xee nruab nrab sib npaug kev ua tau zoo thiab tus nqi, zam cov khoom siv nyiaj siab los ntawm ntau cov nickel ntxiv. |
| Chromium (Cr) | 19.0 – 23.0 | Ib qho tseem ceeb rau corrosion thiab oxidation kuj. It forms a dense, adherent chromium oxide film (Cr₂O₃) on the alloy surface at high temperatures, which effectively blocks the intrusion of oxygen, carbon, and corrosive media. Cov khoom no yog lub hauv paus rau cov alloy zoo heev -kub oxidation thiab carburization kuj. |
| Hlau (Fe) | Qhov nyiaj tshuav (feem ntau 39.5 - 49.5) | Lub hauv paus matrix keeb ntawm lub alloy. Nws txo tus nqi tag nrho cov alloy thaum koom tes nrog npib tsib xee thiab chromium kom muaj kev ruaj ntseg ntawm cov qauv austenitic. |
| Cov pa roj carbon (C) | Tsawg dua lossis sib npaug li 0.10 | Kev tswj nruj nruj ntawm qib qis kom tsis txhob muaj nag lossis daus ntawm chromium carbides (Cr₂₃C₆) ntawm cov ciam teb thaum lub sij hawm vuam los yog kev kho cua sov. Qhov no zoo tiv thaiv intergranular corrosion thiab ua kom muaj kev ncaj ncees ntawm cov khoom siv welded nyob rau hauv ib puag ncig corrosive. |
| Manganese (Mn) | Tsawg dua lossis sib npaug li 1.50 | Ua raws li deoxidizer thaum smelting, txhim kho cov casting thiab forging processability ntawm cov hlau. Nws kuj me ntsis txhim khu lub alloy lub zog yam tsis muaj txo nws cov ductility. |
| Silicon (Si) | Tsawg dua lossis sib npaug li 1.00 | Ib tug deoxidizing thiab desulfurizing tus neeg sawv cev nyob rau hauv cov txheej txheem smelting. Nws pab txhim kho cov alloy lub fluidity thaum lub sij hawm casting thiab pab tsim ib tug nruam oxide zaj duab xis, txhim kho siab - kub oxidation kuj. |
| Aluminium (Al) | 0.15 – 0.60 | Ua hauj lwm nrog titanium los tsim cov precipitates zoo (xws li Ni₃Al, Ni₃Ti) ntawm qhov kub thiab txias, uas tuaj yeem pin cov ciaj ciam ntawm cov qoob loo thiab txhim kho cov alloy siab siab - kub creep zog thiab cov qauv ruaj khov. |
| Titanium (Ti) | 0.15 – 0.60 | Koom tes nrog txhuas los ua lub luag haujlwm txhawb nqa nag lossis daus. Nws kuj tseem muaj kev sib raug zoo rau cov pa roj carbon monoxide, uas tuaj yeem tsim titanium carbides thiab txo qhov kev pheej hmoo ntawm chromium carbide nag lossis daus, ntxiv kev tiv thaiv kev cuam tshuam ntawm intergranular corrosion rhiab heev. |
| Copper (Cu) | Tsawg dua lossis sib npaug li 0.75 | Ib txoj kab tsis huv, nrog rau nws cov ntsiab lus nruj me ntsis kom tsis txhob muaj kev cuam tshuam tsis zoo ntawm cov hlau alloy siab - qhov kub thiab txias kev ua haujlwm thiab weldability. |
| Sulfur (S) | Tsawg dua lossis sib npaug li 0.015 | Ua phem impurity. Nws cov ntsiab lus tsis tshua muaj ua kom cov hlau tsis muaj zog thiab tsis kam mus rau intergranular cracking, tshwj xeeb tshaj yog nyob rau hauv siab - kub qhov kev pab cuam. |
| Phosphorus (P) | Tsawg dua lossis sib npaug li 0.030 | Lwm yam tswj impurity. Kev txwv nws cov ntsiab lus tiv thaiv qhov tshwm sim ntawm qis -kub brittleness thiab txhim kho cov hlau ua kev ua tau zoo. |
