Cov ntaub ntawv uas tuaj yeem tiv taus cov kab nrib pleb feem ntau suav nrog cov hmoov hlau metallurgy (xws li PM-H13), microalloyed steel (xws li H13+Ti/V/Nb), thiab siab -purity pwm steel. Cov ntaub ntawv no, vim lawv qhov zoo thiab tsis zoo microstructure thiab ruaj khov ciam teb, tuaj yeem cuam tshuam cov qoob loo oxidation thiab tawg pib.
1. Powder Metallurgy Steel (PM-H13)
Qhov zoo: Los ntawm atomization hmoov thiab kub isostatic nias txheej txheem, cov txheej txheem microstructure yog qhov zoo heev thiab tsis sib xws, nrog rau thaj tsam loj ntawm cov qoob loo tab sis tsis muaj kev sib txuas tsis tu ncua;
Overheating kuj: Nws tuaj yeem tswj tau qhov zoo -cov qauv nplej txawm tias qis dua 1100 degree, txo qhov kev pheej hmoo ntawm cov qoob loo oxidation;
Cov xwm txheej siv tau: Cov khoom tseem ceeb ntawm siab -precision, ntev-lub neej kub khiav tshuab (xws li nozzles thiab manifolds).
Cov ntaub ntawv siv tau: PM-H13 muaj lub neej ua haujlwm 2-3 zaug ntev dua li cov tshuaj H13 hauv kev txhaj tshuaj pwm, thiab nws cov cua sov tsis ua haujlwm raug txo los ntawm 80%.
2. Microalloyed Steel (H13+Ti/V/Nb)
Mechanism of Action: Qhov sib ntxiv ntawm cov ntsiab lus xws li Ti, V, thiab Nb cov ntaub ntawv zoo carbide los yog nitride precipitates, pinning grain ciam teb thiab inhibiting grain loj hlob thiab oxidation diffusion.
Hom Qib: H13+Ti, H13+V, DH31-Super (muaj Nb);
Kev ua tau zoo: Nyob rau hauv ntev - kev pab cuam lub sij hawm ntawm 950-1050 degree, grain coarsening tus nqi yog txo los ntawm ntau tshaj 40%.
Cov ntaub ntawv txhawb nqa: H13 steel uas muaj 0.1% Nb nthuav tawm 60% txo qis hauv cov qoob loo oxidation qhov tob piv rau H13 zoo tib yam.
3. Siab -Purity Pwm Hlau
Nta: Qhov tseem ceeb txo cov ntsiab lus ntawm impurities xws li S, P, thiab O los ntawm electroslag remelting (ESR) lossis nqus arc remelting (VAR) cov txheej txheem;
Crack Resistance Advantages: Txo qhov kev pheej hmoo ntawm kev sib koom ua ke ua qhov chaw pib tawg thiab txhim kho cov qoob loo ciam teb;
Cov qauv pom zoo: Xaiv ESR lossis VAR qib H13 steel, nrog cov pa oxygen tswj tau tsawg dua lossis sib npaug li 15 ppm.
Kev Tiv Thaiv Tus Nqi: Siab- cov ntaub ntawv purity yog ruaj khov dua thaum lub sij hawm thermal cycling, ua kom muaj zog tiv thaiv thermal qaug zog thiab overheating tawg.
4. Lwm cov ntaub ntawv pom zoo (Cov xwm txheej ua haujlwm tshwj xeeb)
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Hom khoom |
Tej yam uas siv tau |
Qhov zoo |
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Nickel{0}}raws li superalloys (xws li Inconel 718) |
Ultra-high temperature (>700 degree) kub khiav |
Muaj zog oxidation tsis kam, tab sis tus nqi siab thiab kev ua haujlwm nyuaj |
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Ceramic-coated cov ntaub ntawv sib xyaw |
Hnav hnyav + siab - qhov kub thiab txias |
Deg ablation kuj, yuav tsum tau siv nrog ib tug hlau substrate |
Lus Cim: Superalloys tsis haum rau kev hloov niaj hnub; tsuas yog rau cov kev cai tsim tshwj xeeb.
5. Cov tswv yim xaiv cov khoom siv tswv yim
Ua ntej PM-H13 lossis H13+Ti: Cov no yog cov khoom siv tseem ceeb nrog tus nqi siab- ua haujlwm tau zoo thiab ua haujlwm tsis zoo rau cov tawg tawg.
Kev tswj xyuas cov khoom xa tuaj nruj me ntsis: Ua kev kuaj xyuas cov qauv metallographic ntawm cov khoom siv tshiab kom paub meej tias qhov tsis muaj qhov qub nplej coarsening lossis suav nrog qhov tsis xws luag.
Tsim cov ntaub ntawv cov ntaub ntawv: Sau cov tshuaj muaj pes tsawg leeg, kev kho cua sov, thiab kev pabcuam keeb kwm ntawm txhua pawg rau kev taug qab thiab ua kom zoo.
Txoj Cai Kev Nyab Xeeb: Cov khoom siv yog thawj kab ntawm kev tiv thaiv. Xaiv cov khoom uas muaj zog tiv thaiv overheating tuaj yeem txo qhov kev pheej hmoo ntawm kev tawg.
