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15-5PH stainless hlau: kev ua tau zoo heev ua rau muaj kev tsim kho tshiab hauv kev lag luam
1. Cov tshuaj lom neeg muaj pes tsawg leeg thiab cov khoom siv
Cov tshuaj lom neeg sib xyaw ntawm 15-5PH stainless hlau yog ua tib zoo sib npaug, tso lub hauv paus rau nws qhov kev ua tau zoo heev:
Cov ntsiab lus tseem ceeb ntawm 12CrNi3A hlau suav nrog chromium (Cr) thiab nickel (Ni), thiab nws cov tshuaj lom neeg muaj pes tsawg leeg yog:
| Cr (%) | Hauv (%) | Nrog (%) | Nb (%) |
| 14.0-15.5 | 3.5-5.5 | 2.5-4.5 | 0.15-0.45 |
Cr: Muaj kev tiv thaiv corrosion zoo
Ni: Txhim kho qhov kev ua tau zoo thiab kev ua kom tawv ntawm cov khoom siv
Cu: Ua kom cov khoom siv khov kho zoo dua qub
Nb: Ua ib qho khoom ruaj khov, nws tiv thaiv kev xeb intergranular
Cov khoom siv no siv cov txheej txheem smelting huv dua (feem ntau yog lub tshuab nqus tsev yaj), muaj cov ntsiab lus S qis dua (≤0.015%), cov qauv sib xws dua, thiab txhim kho qhov tawv thiab kev ua haujlwm vuam zoo dua.
2. Cov txiaj ntsig ntawm kev ua haujlwm txhua yam
15-5PH stainless hlau muaj cov khoom siv kho tshuab zoo heev ntawm chav tsev kub:
Lub zog tensile ≥1035 MPa
Lub zog tawm los ≥930 MPa
Kev ntev ≥12%
Qhov nyuaj: 40-44 HRC tom qab kev kho cua sov
Tshwj xeeb, nyob rau hauv tib lub H900 kev kho cua sov li 17-4PH, qhov cuam tshuam toughness ntawm 15-5PH yog yuav luag ob npaug ntawm 17-4PH (15-5PH ≥40 J, 17-4PH ≥20 J), ua rau nws tsim nyog rau cov xwm txheej tseem ceeb ntawm daim ntawv thov uas raug cuam tshuam thiab qaug zog.
3. Kev tiv thaiv xeb
15-5PH stainless hlau muaj kev tiv thaiv corrosion zoo heev thiab ua tau zoo heev hauv qhov chaw me me mus rau qhov nruab nrab corrosive, xws li qhov chaw muaj chloride ions, dej tshiab thiab cov pa roj acidic.
Tom qab kev kho cua sov kom zoo, qhov kev tiv thaiv corrosion ntawm 15-5PH stainless hlau zoo dua li ntawm cov hlau martensitic ib txwm muaj. Vim nws cov qauv zoo ib yam thiab tsawg dua qhov tsis huv, nws qhov kev tiv thaiv rau pitting thiab intergranular corrosion kuj zoo dua me ntsis dua li ntawm 17-4PH stainless hlau.
4. Kev ua thiab kev vuam ua tau zoo
Cov hlau tsis xeb 15-5PH ua rau pom kev ua haujlwm zoo heev thiab vuam:
(1) Zoo dua weldability (cov ntsiab lus sulfur tsawg txhim kho qhov tawg tsis kam ntawm thaj chaw weld).
(2) Kev hloov pauv me dua tom qab kev kho cua sov (kev ruaj khov dua).
(3) Zoo dua rau cov khoom sib xyaw ua ke.
15-5PH tuaj yeem vuam tau los ntawm txhua txoj kev hauv cov kua khov, laus lossis laus dua. Tsis tas yuav tsum tau ua kom sov ua ntej vuam. Kev kho cua sov kom zoo yog qhov yuav tsum tau ua tom qab vuam kom rov qab tau cov khoom zoo tshaj plaws.
5. Kev kho cua sov yooj ywm
Cov khoom ntawm 15-5PH stainless hlau tuaj yeem txhim kho tau zoo los ntawm kev ua kom tawv tawv los ntawm nag lossis daus:
(1) Kev kho cov tshuaj: Cua txias yog ua tiav ntawm kwv yees li 1038 ° C kom cov khoom siv mus txog qhov xwm txheej austenitized sib xws.
(2) Kev ua kom tawv thaum los nag: Cov xeev ua kom tawv feem ntau suav nrog H900, H1025, H1075, H1150, thiab lwm yam. Kev sib xyaw ua ke ntawm lub zog thiab kev tawv tawv tuaj yeem tau txais los ntawm kev kho mob tempering ntawm qhov kub sib txawv (480 ° C txog 620 ° C).
Qhov kev ua haujlwm thermal no tso cai rau kev kho kom raug ntawm cov khoom siv rau cov kev xav tau tshwj xeeb.
6. Ntau yam kev siv
15-5PH stainless hlau yog siv dav hauv cov teb hauv qab no vim nws cov khoom zoo heev:
(1) Aerospace: Tsim cov khoom siv dav hlau uas muaj zog, ruaj khov thiab tiv taus xeb, cov khoom siv cav thiab cov khoom siv txuas.
(2) Kev lag luam roj thiab roj av: Haum rau cov cuab yeej siv roj, cov li qub, cov twj tso kua mis, cov kav dej thiab cov hlab ntsha siab hauv cov chaw muaj zog.
(3) Kev lag luam nuclear: siv rau cov khoom siv nuclear reactor thiab lwm yam khoom siv uas xav tau lub zog siab, siab toughness thiab corrosion tsis kam.
(4) Cov khoom siv kho mob: siv los tsim cov cuab yeej phais thiab cov khoom cog vim lawv txoj kev tiv thaiv corrosion zoo heev thiab biocompatibility.
(5) Cov khoom siv tshuaj lom neeg: siv los tsim cov khoom siv xws li cov reactors, cov khoom hloov pauv cua sov thiab cov tso tsheb cia khoom uas yuav tsum tau tiv taus cov xov xwm corrosive.
7. Sib piv nrog 17-4PH stainless hlau
15-5PH yog qhov kev txhim kho ntawm 17-4PH thiab muaj ntau qhov zoo pom tseeb:
| yam ntxwv | 17-4PH | 15-5PH |
| Cov ntsiab lus ntawm sulfur | ≤0.03% | ≤0.015% (qis dua) |
| Kev cuam tshuam tawv | ≥20 J | ≥40 J (siab dua) |
| Weldability | nruab nrab | zoo dua (tsawg sulfur ua rau lub zog tawv dua) |
| Kev kho cua sov deformation | qee yam | kev ruaj khov dua |
| Kev tawv tawv ntawm sab nraud | nruab nrab | zoo dua |
| Kev sib npaug ntawm cov ntaub so ntswg | zoo | zoo dua |
8. Xaiv qhov xwm txheej siv tau ntawm 15-5PH
Raws li qhov yuav tsum tau ua ntawm daim ntawv thov tiag tiag, 15-5PH stainless hlau yog qhov zoo dua rau hauv cov xwm txheej hauv qab no:
(1) Cov khoom siv uas muaj cov kev xav tau siab rau kev tawv thiab kev sib txuas
(2) Cov khoom siv dav hlau precision
(3) Cov khoom tseem ceeb ntawm cov qauv (vim lawv qhov kev ua tau zoo dua ntawm sab thiab qhov kub qis)
(4) Cov khoom sib xyaw uas xav tau kev kho cua sov tom qab vuam
Hauv cov xwm txheej uas tus nqi yog qhov tseem ceeb, xav tau cov khoom siv dav dav, thiab cov qauv pwm, 17-4PH tseem yog qhov kev xaiv zoo vim nws qhov kev lag luam thiab kev siv tau zoo.
15-5PH stainless hlau tau dhau los ua qhov kev xaiv zoo tshaj plaws rau ntau daim ntawv thov vim nws qhov muaj zog dua, qhov sib npaug zoo ntawm lub zog thiab qhov nyuaj thiab kev txhim kho weldability.
Nws daim ntawv thov ua tiav hauv kev tsav dav hlau, lub zog, kev kho mob thiab lwm yam teb tau ua pov thawj nws qhov kev ua tau zoo thiab kev ntseeg siab. Raws li kev siv tshuab kev lag luam txuas ntxiv txhim kho, 15-5PH stainless hlau yuav txuas ntxiv ua lub luag haujlwm tseem ceeb hauv ntau qhov chaw tseem ceeb.