High-temperature alloy phaj yog cov khoom tshwj xeeb uas tswj kev ua haujlwm zoo hauv qhov chaw kub kub. Nws yog dav siv hauv aerospace, zog, tshuaj, thiab lwm yam. Nws qhov zoo yog feem ntau xav txog hauv cov hauv qab no:

1. Kev ruaj ntseg zoo heev

High-Temperature Strength Retention: Txawm tias nyob rau hauv qhov chaw kub siab tshaj 600 ° C, nws tuav lub zog tensile siab, lub zog tawm los, thiab lub zog qaug zog, thiab tsis soften sai nrog qhov kub thiab txias. Piv txwv li, npib tsib xee-raws li superalloys tswj cov khoom siv kho kom txaus ntawm qhov kub ntawm ib ncig ntawm 1000 ° C, ua tau raws li qhov yuav tsum tau muaj ntawm cov khoom tseem ceeb xws li lub cav turbine hniav.

Creep Resistance: Thaum muaj kev ntxhov siab ntev ntawm qhov kub thiab txias, cov ntaub ntawv nthuav tawm tsawg kawg deformation (creep resistance), tiv thaiv tsis ua hauj lwm vim qeeb deformation. Qhov no yog qhov tseem ceeb rau cov khoom siv xws li turbines thiab boilers uas ua haujlwm nyob rau hauv high-temperature thiab high-pressure ib puag ncig.

2. Zoo heev Oxidation thiab Corrosion Resistance

High-Temperature Oxidation Resistance: Nyob rau hauv high-kub huab cua los yog roj, cov ntaub ntawv tsim ib tug ntom oxide zaj duab xis (xws li Cr₂O₃ los yog Al₂O₃) ntawm nws nto, tiv thaiv ntxiv oxygen nres, zoo tiv thaiv oxidative corrosion, thiab ncua nws cov kev pab cuam lub neej. Piv txwv li, cov phaj hlau uas muaj chromium thiab txhuas tuav tau zoo heev oxidation tsis kam ntawm qhov kub siab tshaj 1000 ° C.

Corrosion Resistance: High-temperature alloys resistant rau acidic thiab alkaline gases (xws li hydrogen sulfide thiab sulfur dioxide), molten hlau, thiab ntsev, ua rau lawv haum rau complex tej chaw xws li tshuaj reactors, khib incinerators, thiab nuclear reactors.

3. Kev ua tau zoo heev thiab cov qauv ruaj khov

Kev ua tau zoo: Txawm tias lawv lub zog muaj zog, cov hlau kub kub tuaj yeem tsim rau hauv ntau hom, nrog rau cov phaj thiab cov raj, los ntawm cov txheej txheem xws li forging, dov, thiab vuam, kom ua tau raws li cov qauv tsim qauv ntawm cov khoom sib txawv (xws li cov hlau kub-resistant steel phaj rau cov boilers loj thiab combustion chamber panels rau aircraft cav).

Microstructural Stability: Txawm tias siv lub sijhawm ntev ntev, cov qauv metallographic sab hauv (xws li alloy theem thiab cov qauv nplej) zoo li tsis muaj kev hloov pauv tseem ceeb. Qhov no tiv thaiv kev ua haujlwm tsis zoo vim kev ua haujlwm tsis zoo thiab ua kom lub sijhawm ntev ntawm cov khoom siv txhim khu kev qha.

4. Kev kub siab dav dav, haum rau ib puag ncig huab cua

Alloy daim hlau npog qhov kub ntawm qhov nruab nrab-siab kub (600 ° C) mus rau ultra-siab kub (siab tshaj 1200 ° C). Cov hlau nplaum uas muaj cov sib txawv yog tsim rau cov kev siv sib txawv: piv txwv li, hlau-raws li alloys yog tsim rau kub ntawm 600-800 ° C, npib tsib xee-raws li alloys haum rau kub ntawm 800-1200 ° C, thiab cobalt-raws li alloys yuav siv tau nyob rau hauv kub siab dua rau lub sij hawm luv luv.

Lawv tuaj yeem tiv taus qhov sib xyaw ua ke ntawm qhov kub thiab txias thiab cov khoom siv kho tshuab. Piv txwv li, turbine disks hauv cov tshuab dav hlau yuav tsum tiv thaiv ob qho tib si qhov kub thiab txias ntawm cov roj combustion thiab cov centrifugal rog tsim los ntawm kev sib hloov ceev.

5. Lub teeb yuag thiab txuag hluav taws xob muaj peev xwm

Piv nrog rau cov khoom siv hluav taws xob kub-resistant, qee qhov kub-txias alloys (xws li npib tsib xee-raws li thiab titanium-aluminium-based alloys) muaj qhov ntom ntom ntawm tib qhov kev ua haujlwm kub, ua rau cov khoom siv sib sib zog nqus (piv txwv li, txo cov qauv hnyav thiab kev siv zog hauv kev lag luam aerospace).

Vim tias lawv qhov kub thiab txias ua haujlwm tau zoo, lawv tuaj yeem txo cov khoom siv tu ntau zaus thiab hloov cov nqi, tsis ncaj qha kev txhim kho lub zog (piv txwv li, siv cov hlau kub kub hauv cov hluav taws xob cog boilers tuaj yeem ua kom kub kub thiab hluav taws xob tsim hluav taws xob).