Q1: Dab tsi yog cov tshuaj lom neeg muaj pes tsawg leeg sib txawv ntawm Inconel 617 thiab Inconel 740H super stainless kav, thiab lawv ua li cas lawv ua tau zoo?
A1: Inconel 617 thiab 740H yog ob qho tib si npib tsib xee-raws li super stainless kav, tab sis lawv cov tshuaj muaj pes tsawg leeg yog tsim rau cov hom phiaj kev ua tau zoo. Inconel 617 yog npib tsib xee -chromium-cobalt- molybdenum alloy nrog cov muaj pes tsawg leeg: 50-55% npib tsib xee, 20-23% chromium, 10-15% cobalt, 5% ntawm molybdenum, 8% thiab txhuas titanium. Qhov sib ntxiv ntawm cobalt thiab molybdenum txhim kho nws qhov siab -kub ductility thiab creep resistance. Inconel 740H, ib tiam tshiab nickel{30}}chromium-hlau alloy, muaj 45-55% nickel, 22-25% chromium, 15-20% hlau, 2.0-3.0% niobium, thiab 1.0-1.5% titanium. Nws tsis muaj cobalt tab sis ntxiv niobium rau nag lossis daus hardening, uas ua rau nws muaj zog kub kub thiab creep rupture kuj. Cov kev sib txawv no ua rau 617 superior hauv thermal qaug zog tiv thaiv, thaum 740H ua tau zoo hauv kev kub ntxhov siab kub.
Q2: Dab tsi yog qhov tseem ceeb siab - qhov kub thiab txias kev ua tau zoo ntawm Inconel 617 thiab 740H super stainless kav?
A2: Ob lub alloys yog engineered rau siab - daim ntawv thov kub tab sis muaj zog sib txawv. Inconel 617 super stainless cov kav dej muaj qhov ua tau zoo heev -kub ductility thiab thermal qaug zog tsis kam, nrog rau qhov siab tshaj plaws kev pabcuam kub ntawm 1050℃(1922℃F) thiab luv luv -lub sijhawm raug rau 1100℃(2102℃F). Lawv tuav tau zoo toughness txawm tias tom qab ntev - lub sij hawm siab - qhov kub thiab txias, ua rau lawv zoo tagnrho rau cyclic thermal ib puag ncig. Inconel 740H cov kav dej xa cov khoom zoo tshaj - qhov kub thiab txias tsis kam, tsim rau kev pabcuam txuas ntxiv ntawm 700-950℃(1292-}1742℃F). Nws cov nag lossis daus hardening mechanism (los ntawm niobium thiab titanium) ua kom nws khaws cov neeg kho tshuab siab nyob rau hauv kev ntxhov siab, ua haujlwm tau zoo tshaj 617 nyob rau hauv high-load high-temperature scenarios.
Q3: Dab tsi yog qhov kev thov raug cai ntawm Inconel 617 thiab 740H super stainless kav?
A3: Lawv daim ntawv thov raug ua raws li lawv qhov kev ua tau zoo. Inconel 617 super stainless kav yog dav siv nyob rau hauv petrochemical cov nroj tsuag (xws li, reformer tubes, tshav kub exchanger tubes), lub zog tsim hluav taws xob (coal - raug rho tawm haujlwm thiab roj- hluav taws xob cog boiler raj), thiab aerospace ( cav tov khoom). Lawv zoo heev thermal qaug zog tsis kam thiab oxidation tsis kam ua rau lawv haum rau cov khoom raug hloov kub dua. Cov kav dej Inconel 740H feem ntau yog siv rau hauv cov tshuab tsim hluav taws xob, xws li ultra-supercritical (USC) thiab qib siab ultra-supercritical (AUSC) boilers, nrog rau nuclear fais fab nroj tsuag tshav kub hloov raj. Lawv qhov siab - qhov kub thiab txias tsis kam ua rau lawv zoo tagnrho rau cov khoom siv ua haujlwm hauv siab thiab kub.
Q4: Dab tsi yog qhov tseem ceeb ntawm kev kho cua sov rau Inconel 617 thiab 740H super stainless kav?
A4: Kev kho cua sov yog qhov tseem ceeb los txhim kho kev ua tau zoo ntawm ob qho tib si alloys, nrog rau cov txheej txheem tshwj xeeb rau txhua tus. Rau Inconel 617: Kev kho cua sov txheej txheem suav nrog kev daws teeb meem ntawm 1150-1200℃(2102-2192℃F) ua raws li kev ua kom txias sai (cua lossis dej txias) txhawm rau txhim kho cov qauv nplej, txhim kho ductility, thiab rov ua kom corrosion kuj. Tsis muaj hnub nyoog ntxiv hardening yog yuav tsum tau, raws li nws tso siab rau cov tshuaj ntxiv dag zog. Rau Inconel 740H: Cov txheej txheem suav nrog kev daws teeb meem ntawm 1050-1100℃(1922-2012℃F) nrog cua txias sai, ua raws li hnub nyoog hardening ntawm 700-750℃(1292-1382℃F) rau 16-24 teev. Cov txheej txheem ob kauj ruam no txhawb kev tsim kom muaj zog precipitates, ua kom nws qhov kub thiab txias zog thiab creep kuj.
Q5: Cov kev sib tw thiab kev ceev faj dab tsi yog koom nrog hauv vuam Inconel 617 thiab 740H super stainless kav?
A5: Vuam cov kav dej super stainless yuav tsum tswj cov txheej txheem nruj vim lawv cov ntsiab lus alloy siab. Rau Inconel 617: Cov teeb meem tseem ceeb yog cov nplej coarsening thiab kub tawg. Kev ceev faj tseem ceeb suav nrog kev siv npib tsib xee zoo sib xws-raws li vuam hlau (xws li, ERNiCrCoMo-1), tswj cov cua sov kom tsis txhob muaj cov qoob loo ntau dhau, preheating lub hauv paus hlau mus rau 150-250℃kom txo cov thermal stress, thiab ua tom qab-weld solution annealing. Rau Inconel 740H: Cov kev sib tw vuam muaj xws li kev tswj cov nag lossis daus-tawv tawv thiab tsis txhob cuam tshuam kev cuam tshuam ntawm intergranular. Siv ERNiCrFe-14 welding hlau, tsis txhob kub preheating (tsawg dua los yog sib npaug li 250 degree), ua tom qab weld tov annealing ua raws li lub hnub nyoog hardening kom rov muaj zog, thiab xyuas kom meej tu kom huv si tshem tawm cov kab mob uas yuav ua rau weld tsis xws luag.
