1.4542 (17-4 PH& AISI 630) Bar
Precipitation hardening stainless hlau yog chromium thiab npib tsib xee uas muaj cov hlau uas muab kev sib xyaw ua ke zoo tshaj plaws ntawm cov qib martensitic thiab austenitic. Zoo li qib martensitic, lawv paub txog lawv lub peev xwm kom tau txais lub zog siab los ntawm kev kho cua sov thiab lawv kuj muaj qhov corrosion kuj ntawm austenitic stainless hlau.
Lub zog tensile siab ntawm nag lossis daus hardening stainless hlau tuaj tom qab kev kho cua sov uas ua rau nag lossis daus hardening ntawm martensitic lossis austenitic matrix. Hardening yog tiav los ntawm kev sib ntxiv ntawm ib los yog ntau tshaj ntawm tooj liab, Aluminium, Titanium, Niobium, thiab Molybdenum.
Qhov zoo tshaj plaws nag lossis daus hardening steel yog {{0}} PH. Lub npe los ntawm kev ntxiv 17 feem pua Chromium thiab 4 feem pua nickel. Nws kuj muaj 4% tooj liab thiab 0.3 feem pua Niobium. 17-4 PH tseem hu ua stainless hlau qib 630.
Qhov kom zoo dua ntawm nag lossis daus hardening steels yog tias lawv tuaj yeem muab tau rau hauv "kev daws teeb meem", uas yog yooj yim machinable. Tom qab machining los yog lwm txoj kev fabrication, ib qho kev kho cua sov uas tsis tshua muaj siab tuaj yeem siv los ua kom lub zog ntawm cov hlau. Qhov no yog hu ua aging lossis age-hardening. Raws li nws yog nqa tawm ntawm qhov kub thiab txias, cov tivthaiv undergoes tsis distortion.
Cim xeeb
Precipitation hardening steels yog tus cwj pwm rau hauv ib qho ntawm peb pawg raws li lawv qhov kawg microstructures tom qab kev kho cua sov. Peb hom yog: martensitic (piv txwv li 17-4 PH), semi-austenitic (piv txwv li 17-7 PH) thiab austenitic (xws li A-286).
Martensitic Alloys
Martensitic nag lossis daus hardening stainless steels muaj ib tug feem ntau austenitic qauv ntawm annealing kub ntawm ib ncig ntawm 1040 mus rau 1065 degree. Thaum txias rau chav tsev kub, lawv raug hloov pauv uas hloov cov austenite mus rau martensite.
Semi-austenitic Alloys
Tsis zoo li martensitic nag lossis daus hardening steels, annealed semi-austenitic nag lossis daus hardening steels yog mos txaus los ua haujlwm txias. Semi-austenitc steels khaws lawv cov qauv austenitic ntawm chav tsev kub tab sis yuav tsim martensite ntawm qhov kub qis heev.
Austenitic Alloys Austenitic nag lossis daus hardening steels khaws lawv cov qauv austenitic tom qab annealing thiab hardening los ntawm kev laus. Ntawm qhov kub thiab txias ntawm 1095 txog 1120 degree nag lossis daus hardening theem yog soluble. Nws tseem nyob rau hauv kev daws thaum lub sij hawm txias ceev. Thaum reheated rau 650 rau 760 degree, nag lossis daus tshwm sim. Qhov no nce hardness thiab lub zog ntawm cov khoom. Hardness tseem qis dua li rau martensitic lossis semi-austenitic nag lossis daus hardening steels. Austenitic alloys nyob twj ywm nonmagnetic.
Lub zog
Cov khoom muaj zog rau nag lossis daus-tawv tawv stainless hlau yog 515 txog 1415 MPa. Tensile lub zog ntau ntawm 860 txog 1520 MPa. Elongations yog 1 txog 25 feem pua. Kev ua haujlwm txias ua ntej kev laus tuaj yeem siv los pab txhawb kev muaj zog ntau dua.
Tshuaj muaj pes tsawg leeg
Spec: EN 10088-3: 2005
1, 4542 steel
| Chemical Element | feem pua Present |
|---|---|
| Cov pa roj carbon (C) | 0.0 - 0.07 |
| Chromium (Cr) | 15.00 - 17.00 |
| Manganese (Mn) | 0.0 - 1.50 |
| Silicon (Si) | 0.0 - 0.70 |
| Phosphorus (P) | 0.0 - 0.04 |
| Sulfur (S) | 0.0 - 0.03 |
| Nickel (Ni) | 3.00 - 5.00 |
| Copper (Cu) | 3.00 - 5.00 |
| Molybdenum (hli) | 0.0 - 0.60 |
| Niobium (Columbium) (Nb) | 0.0 - 0.45 |
| Hlau (Fe) | Tshuav |
Cov khoom
| Lub cev khoom | Tus nqi |
|---|---|
| Qhov ntom | 7.75 g / cm³ |
| Thermal Expansion | 10.8 x10^-6 /K |
| Modulus ntawm Elasticity | 196 gpa ua |
| Thermal conductivity | 18.4 W/m.K |
| Hluav taws xob Resistivity | 0.8 x10^-6 Ω .m |
Spec: EN 10088-3: 2005
Bar - Solution Annealed - Txog li 100mm Dia. / Thickness
| Mechanical Property | Tus nqi |
|---|---|
| Tensile zog | 1200 max MPa |
| Hardness Brinell | 360 Max HB |
Spec: EN 10088-3: 2005
Bar - ntawm P800 - Mus txog 100mm Dia / Thickness
| Mechanical Property | Tus nqi |
|---|---|
| Pov thawj Stress | 520 Min MPa |
| Tensile zog | 800 - 950 MPa |
| Elongation A | 18Min feem pua |
Spec: EN 10088-3: 2005
Bar - ntawm P930 - Mus txog 100mm Dia. / Thickness
| Mechanical Property | Tus nqi |
|---|---|
| Pov thawj Stress | 720 Min MPa |
| Tensile zog | 930 - 1100 MPa |
| Elongation A | 16 Min feem pua |
Spec: EN 10088-3: 2005
Bar - ntawm P960 - Mus txog 100mm Dia. / Thickness
| Mechanical Property | Tus nqi |
|---|---|
| Pov thawj Stress | 790 hli MPa |
| Tensile zog | 960 - 1160 MPa |
| Elongation A | 12 Min feem pua |
Spec: EN 10088-3: 2005
Bar - ntawm P1070 - Mus txog 100mm Dia. / Thickness
| Mechanical Property | Tus nqi |
|---|---|
| Pov thawj Stress | 1000 Min MPa |
| Tensile zog | 1070 - 1270 MPa |
| Elongation A | 10 Min feem pua |
Alloy Designations
Stainless 1.4542 zoo ib yam li, tab sis yuav tsis yog qhov sib npaug ncaj qha:
17/4
UNS S17400
Qib 630
Cov ntawv muab khoom
Qhov no yog bar specification, feem ntau muaj nyob rau hauv round thiab hexagon
- Bar
Daim ntawv thov
Vim lub zog siab ntawm nag lossis daus hardening stainless hlau, feem ntau cov ntawv thov yog nyob rau hauv aerospace thiab lwm yam kev lag luam high-tech.
Cov ntawv thov suav nrog:
~ Gears
~ Valves thiab lwm yam cav tov
~ Siab zog ncej
~ Turbine hniav
~ Moulding tuag
~ Nuclear khib nyiab pov tseg
Corrosion Resistance
Cov nag lossis daus hardening stainless hlau muaj nruab nrab mus rau qhov zoo corrosion kuj nyob rau hauv ntau qhov chaw. Lawv muaj kev sib xyaw ua ke zoo dua ntawm lub zog thiab kev tiv thaiv corrosion dua li thaum piv nrog cov cua sov kho tau 400 series martensitic alloys. Corrosion kuj zoo ib yam li pom nyob rau hauv qib 304 stainless hlau.
Nyob rau hauv ib puag ncig sov chloride, 17-4 PH yog raug rau pitting thiab crevice corrosion. Thaum muaj hnub nyoog ntawm 550 degree lossis siab dua, 17-4 PH yog tiv taus rau kev ntxhov siab corrosion tawg. Cov kev ntxhov siab zoo dua corrosion cracking kuj los nrog kev laus dua kub.
Corrosion kuj tsis tshua muaj nyob rau hauv cov tshuaj kho (annealed) mob thiab nws yuav tsum tsis txhob siv ua ntej kev kho cua sov.
Thaum tshav kub kub Resistance
17-4 PH muaj oxidation zoo. Txhawm rau kom tsis txhob txo qis hauv cov khoom siv kho tshuab, nws yuav tsum tsis txhob siv dhau nws cov nag lossis daus hardening kub. Ntev ntev raug rau 370-480 degree yuav tsum zam yog tias qhov kub thiab txias yog qhov tseem ceeb.
Fabrication
Fabrication ntawm tag nrho cov hlau stainless yuav tsum tau ua nrog cov cuab yeej tshwj xeeb rau cov khoom siv stainless hlau lossis cov cuab yeej siv thiab cov chaw ua haujlwm yuav tsum tau ua kom huv si ua ntej siv. Cov kev ceev faj no yog tsim nyog kom tsis txhob hla kev sib kis ntawm cov hlau tsis muaj hlau los ntawm cov hlau yooj yim corroded uas yuav ua rau tsis muaj xim ntawm cov khoom fabricated.
Ua haujlwm txias
Txias txoj kev xws li dov, dabtsi yog khoov thiab hydroforming tuaj yeem ua tau ntawm 17-4PH tab sis tsuas yog nyob rau hauv tag nrho cov mob annealed. Tom qab ua haujlwm txias, kev ntxhov siab corrosion kuj zoo dua los ntawm kev rov ua dua ntawm cov nag lossis daus hardening kub.
Kub Ua Haujlwm
Kev ua haujlwm kub ntawm 17-4 PH yuav tsum tau ua ntawm 950 degree -1200 degree . Tom qab ua haujlwm kub, kev kho cua sov tag nrho yog xav tau. Qhov no suav nrog annealing thiab txias rau chav tsev kub lossis qis dua. Tom qab ntawd cov khoom yuav tsum tau los nag lossis daus hardened kom ua tiav cov khoom siv kho tshuab.
Machineability
Nyob rau hauv cov mob annealed, 17-4 PH muaj machinability zoo, zoo ib yam li 304 stainless hlau. Tom qab hardening kev kho cua sov, machining yog nyuaj tab sis ua tau.
Carbide lossis cov cuab yeej kub ceev steel feem ntau yog siv nrog cov txheej txheem lubrication. Thaum cov kev txwv nruj yuav tsum tau ua, qhov kev hloov pauv loj vim yog kev kho cua sov yuav tsum raug coj mus rau hauv tus account
Kev kho cua sov
Tus yuam sij rau cov khoom ntawm nag lossis daus hardening stainless hlau yog nyob rau hauv kev kho cua sov.
Tom qab kev daws teeb meem los yog annealing ntawm nag lossis daus hardening stainless hlau, ib qho qis kub "hnub nyoog hardening" theem yog ua hauj lwm kom ua tiav cov khoom yuav tsum tau. Raws li qhov kev kho mob no yog nqa tawm ntawm qhov kub thiab txias, tsis muaj kev cuam tshuam tshwm sim thiab tsuas muaj qhov tsis txaus ntseeg ntawm lub ntsej muag. Thaum lub sij hawm hardening txheej txheem me ntsis txo qhov luaj li cas tshwm sim. Qhov no shrinking yog kwv yees li {{0}}.05 feem pua rau cov mob H900 thiab 0.10 feem pua rau H1150.
Cov khoom siv kho tshuab zoo ua tiav rau 17-4 PH tom qab kev kho kho thiab lub hnub nyoog hardening tau muab rau hauv cov lus ntawm nplooj ntawv txuas. Cov xwm txheej raug muab los ntawm lub hnub nyoog hardening kub hauv degree F.
Qhov xwm txheej: Tensile Strength Range (N / mm² lossis MPa) QT 650: 650 - 850
QT 700: 700 - 850
QT 800: 800 - 950
QT 850: 850 - 1000
QT 900: 900 - 1050
Weldability
Cov nag lossis daus hardening steels tuaj yeem nkag tau yooj yim siv cov txheej txheem zoo ib yam li siv rau 300 series ntawm stainless hlau.
Qib 17-4 PH tuaj yeem ua tiav welded yam tsis muaj preheating. Kev kho cua sov tom qab vuam tuaj yeem siv los muab cov hlau vuam zoo ib yam li cov niam txiv hlau. Qhov pom zoo qib ntawm cov pas nrig rau vuam 17-4 PH yog 17-7 PH.
Hu rau US
Cim npe nrov: 17-4 ph stainless steel bar propertis, Suav teb, manufacturers, lwm tus neeg, hoobkas