Qhov txawv ntawm 15-5ph thiab 17-4ph yog dab tsi?
Tso lus
Stainless hlau yog ib qho kev xaiv nrov rau ntau yam kev lag luam vim nws lub zog, toughness thiab corrosion kuj zog. Ob qhov kev lag luam feem ntau siv hom stainless hlau alloys yog 15-5 PH thiab 17-4 PH. Ob leeg ntawm cov alloys no yog cov nag lossis daus-kuaj qib uas muaj cov khoom tshwj xeeb. Hauv tsab ntawv blog no, peb yuav muab piv rau cov alloys no los pab koj txiav txim siab seb qhov twg yuav zoo dua rau koj daim ntawv thov tshwj xeeb.
17-4PH khoom yog dab tsi?
17-4PH stainless hlau yog martensitic nag lossis daus-hardening stainless hlau. Nws muaj kwv yees li 15-17.5% chromium thiab 3-5% npib tsib xee, nrog rau 3-5% tooj liab. Lub npe los ntawm nws cov tshuaj muaj pes tsawg leeg, kwv yees li 17% chromium thiab 4% npib tsib xee. SUS630 yog tib yam li 17-4PH; ob leeg xa mus rau tib qib.
Dab tsi yog 15-5ph khoom sib npaug?
15-5 PH stainless hlau yog ntau qib siv nyob rau hauv aerospace qhov chaw. Qib no yog sau ua 1.4545 lossis 1.4548 lossis X5CrNiCuNb15-5 raws li EN cov cai thiab nws raug sau ua UNS S15500 raws li UNS cov cai. Peb tuaj yeem xav tias 15-5 PH stainless yog qhov zoo dua ntawm 17-4 PH ({10}}) cov khoom.
15-5PH vs . 17-4PH Stainless Hlau: Kev sib piv tshuaj lom neeg
| Lub ntsiab | 17-4 PH (%) | 15-5 PH (%) |
|---|---|---|
| Chromium (Cr) | 15.0 – 17.5 | 14.0 – 15.5 |
| Nickel (Ni) | 3.0 – 5.0 | 3.5 – 5.5 |
| Copper (Cu) | 3.0 – 5.0 | 2.5 – 4.5 |
| Niobium (Cb) | 0.15 – 0.45 | 0.15 – 0.45 |
| Cov pa roj carbon (C) | Tsawg dua los yog sib npaug li 0.07 | Tsawg dua los yog sib npaug li 0.07 |
| Hlau (Fe) | Tshuav | Tshuav |
15-5PH vs . 17-4PH Stainless Hlau: Mechanical thiab Physical Properties
| Khoom | 17-4 PHN | 15-5 PHN |
|---|---|---|
| Qhov kawg Tensile Strength | 1000-1300 MPa | 1100-1380 MPa |
| Yield zog | 850-1100 MPa | 930-1170 MPa |
| Hardness (HRC) | 35–44 | 36–45 |
| Qhov ntom | 7.75 g / cm³ | 7.78 g / cm³ |
| Max Service Temp. | ≈ 600 degree | ≈ 620 degree |
15-5PH vs 17-4PH Stainless Hlau: Lub zog thiab Toughness
Ob leeg 15-5PH (UNS S15500) thiab 17-4PH (UNS S17400) yog nag lossis daus-hardening martensitic stainless hlau. Nyob rau hauv lub ncov-hnub nyoog mob (15-5PH H900 / 17-4PH H900), 15-5PH muaj lub zog tensile ntawm kwv yees li1170-1240 MPa, yield zog ntawm1035-1105 MPa, thiab elongation ntawm10–15 %; 17-4PH muaj lub zog tensile ntawmNtau dua lossis sib npaug li 1310 MPa, yield zog ntawmNtau dua lossis sib npaug li 1170 MPa, thiab elongation ntawmNtau dua lossis sib npaug li 10%. Yog li, 17-4PH muaj zog dua, tab sis 15-5PH, vim yog cov ntsiab lus tooj liab zoo, muaj zog dua me ntsis (kev cuam tshuam lub zog ~ 10-20 J siab dua).
15-5PH vs 17-4PH Stainless Hlau: Corrosion Resistance
Ob leeg muaj cov ntsiab lus chromium zoo sib xws (15-5PH ~ 14.5-16.5%, 17-4PH ~ 16-18%) thiab PREN qhov tseem ceeb ntawm kwv yees li24–30, muab piv rau corrosion kuj nyob rau hauv atmospheric, dej tshiab, thiab me ntsis acid ib puag ncig. Txawm li cas los xij, 17-4PH, nrog me ntsis siab dua chromium, ua tau zoo dua hauv oxidizing acids, thaum 15-5PH, vim tooj liab micro-alloying, muaj me ntsis corrosion kuj zoo dua hauv kev txo cov kua qaub (xws li dilute sulfuric acid), nrog rau tag nrho qhov sib txawv me me.
15-5PH vs 17-4PH Stainless hlau: Kev kho cua sov
Ob leeg siv "kev daws teeb meem annealing (1040-1065℃dej quenching) + aging" txheej txheem, tab sis nrog cov kev laus sib txawv: 15-5PH feem ntau siv.H900 (482℃× 1 h)los yogH1025 (552℃× 4 h), thaum 17-4PH sivH900 (482℃× 1 h)los yogH1150 (621℃× 4 h). Vim muaj ntau yam xim tooj liab precipitate theem, 15-5PH muaj cov lus teb sai dua thiab xav tau qhov kub thiab txias me ntsis kom ua tiav tib lub zog.
15-5PH vs 17-4PH Stainless Hlau: Tus nqi thiab khoom siv
15-5PH, vim nws cov ntsiab lus tooj liab thiab cov txheej txheem ntau lawm, muaj cov nqi raw khoom kwv yees li8-12% siab duatshaj 17-4PH. Nyob rau hauv cov nqe lus ntawm kev lag luam khoom, 17-4PH yog ntau dua (kwv yees li 60-70% ntawm nag lossis daus-hardening stainless hlau lag luam qhia), thaum 15-5PH feem ntau yog tsim los ntawm kev hloov kho, nrog rau lub sijhawm ua haujlwm.2-4 lub lis piam ntev dua.
Dab tsi yog qhov txawv ntawm 17-4ph thiab 304 stainless hlau?
17-4 PH yog ib qho siab -lub zog nag lossis daus-tawv tawv stainless hlau, nrog lub zog thiab hardness deb tshaj li ntawm 304 stainless hlau, ua rau nws zoo tagnrho rau kev xav tau cov yam ntxwv ntawm cov khoom. 304, ntawm qhov tod tes, yog ntau yam austenitic stainless hlau dav siv hauv cov khoom noj thiab kev tsim kho.
Qhov sib txawv tseem ceeb ntawm ob qhov lus dag hauv lub zog siab dua tuaj yeem ua tiav los ntawm kev kho cua sov hauv 17-4 PH, thaum 304 paub txog nws qhov dav dav thiab kev tiv thaiv corrosion. Txawm li cas los xij, 17-4 PH yog qhov cuam tshuam rau chloride kev nyuaj siab corrosion cracking.
GNEE yog ib tus neeg muab kev ntseeg siab ntawm nag lossis daus-cov hlau tsis muaj steel hlau thiab cov hlau tshwj xeeb hauv Suav teb. Peb muab 17-4 PH, 15-5 PH, thiab 17-7 PH alloys nyob rau hauv ntau hom xws li tuav, phaj, profiles, thiab forgings. Tag nrho cov khoom yog los ntawm cov ntawv pov thawj steel mills thiab tau txais cov tshuaj lom neeg muaj pes tsawg leeg thiab cov cuab yeej cuab yeej kuaj xyuas kom ntseeg tau tias muaj txiaj ntsig zoo.
Txawm hais tias koj nyob hauv aerospace, roj thiab roj, marine engineering, lossis kev lag luam tiv thaiv, peb xyuas kom meej tias txhua pawg ntawm peb cov khoom ua tau raws li cov qauv thoob ntiaj teb thiab koj cov kev thov tshwj xeeb.
Nyem qhov no mus saib peb tag nrho cov nag lossis daus -hardening alloys:
