17-4 stainless yog lub hnub nyoog-hardening martensitic stainless combining siab zog nrog corrosion kuj ntawm stainless hlau.Hardening yog ua tiav los ntawm ib lub sij hawm luv luv, kev kho mob tsawg-kub yooj yim.Tsis zoo li cov pa martensitic stainless hlau, xws li hom 410, 17-4 yog weldable heev.Lub zog, corrosion kuj thiab yooj yim fabrication yuav ua tau 17-4 stainless ib tug nqi-zoo hloov rau siab zog carbon steels thiab lwm yam stainless qib.
Ntawm cov tshuaj kho qhov kub thiab txias, 1900 ° F, cov hlau yog austenitic tab sis tau hloov mus rau cov qauv qis-carbon martensitic thaum lub caij txias rau hauv chav sov.Qhov kev hloov pauv no tsis ua tiav kom txog thaum qhov kub poob mus rau 90 ° F.Tom qab cua sov rau qhov kub ntawm 900-1150 ° F rau ib mus rau plaub teev nag lossis daus ntxiv dag zog rau cov hlau.Qhov kev kho hardening no kuj tempers cov qauv martensitic, nce ductility thiab toughness.
C | Cr | Ni | Si | Mn | P | S | Cu | Nb+Ta |
≤ 0.07 | 15.0-17.5 Nws | 3.0-5.0 | ≤1.0 | ≤1.0 | ≤ 0.035 | ≤ 0.03 | 3.0-5.0 | 0.15-0.45 dr hab |
Qhov ntom | Tshwj xeeb kub muaj peev xwm | Melting point | Thermal conductivity | Elastic modulus |
7.78 ib | 502 ib | 1400-1440 Nws | 17.0 Nws | 191 |
Qhov xwm txheej | IB/N/mm2 | 0.2 / N / mm2 | δ 5/% | ψ | HRC | |
Dej nag | 480 ℃ kev laus | 1310 | 1180 | 10 | 35 | ≥40 |
550 ℃ kev laus | 1070 | 1000 | 12 | 45 | ≥35 | |
580 ℃ kev laus | 1000 | 865 ib | 13 | 45 | ≥31 | |
620 ℃ kev laus | 930 ua | 725 ib | 16 | 50 | ≥ 28 |
AMS 5604, AMS 5643, AMS 5825, ASME SA 564, ASME SA 693, ASME SA 705, ASME Hom 630, ASTM A 564, ASTM A 693, ASTM A 705, ASTM Hom 630
Condition A - H1150, ISO 15156-3, NACE MR0175, S17400, UNS S17400, W.Nr./EN 1.4548
•Ib qho yooj yim los kho lub zog theem, uas yog los ntawm kev hloov pauv hauv cov txheej txheem kev kho cua sov los khomartensite theem transformation thiab aging
kev kho cov hlau ua nag lossis daus hardening theem.
•Corrosion qaug zog kuj thiab dej tsis kam.
•Vuam:Nyob rau hauv cov xwm txheej ntawm cov khoom, kev laus los yog overageing, lub alloy yuav welded nyob rau hauv txoj kev, tsis muaj preheating.
Yog hais tias xav tau lub zog vuam ze rau cov hlau lub zog ntawm kev laus hardened, ces cov hlau yuav tsum yog cov khoom tov thiab kev laus kho tom qab vuam.
Cov alloy no kuj tsim nyog rau brazing, thiab qhov zoo tshaj plaws brazing kub yog cov tshuaj kub.
•Corrosion kuj:Alloy corrosion kuj yog superior rau lwm yam qauv hardenable stainless hlau, nyob rau hauv cov dej zoo li qub yooj yim raug kev txom nyem los ntawm corrosion los yog tawg.Nyob rau hauv cov roj av chemical kev lag luam, zaub mov ua thiab ntawv kev lag luam nrog zoo corrosion kuj.
•Offshore platforms, lub dav hlau helicopter, lwm lub platforms.
•Kev lag luam zaub mov.
•Pulp thiab ntawv kev lag luam.
•Qhov chaw (turbine hniav).
•Mechanical qhov chaw.
•Nuclear khib nyiab.