Precipitation-Hardening Stainless Steel yog ib pawg ntawm stainless hlau alloys uas tau dhau los ua cov txheej txheem kho cua sov hu ua nag lossis daus hardening kom lawv lub zog thiab hardness. Cov txheej txheem no suav nrog kev tsim cov hmoov av nplua nuj (me me) hauv cov hlau microstructure, uas cuam tshuam kev txav mus los, ua rau muaj kev nce hauv cov khoom siv xws li lub zog thiab hardness.
Cov yam ntxwv tseem ceeb ntawm Precipitation-Hardening Stainless Steels:
High Strength thiab Corrosion Resistance: Precipitation-hardening stainless steels tuav lub corrosion kuj raug ntawm stainless steels thaum tseem ua tau zoo zog los ntawm kev kho cua sov txheej txheem.
Kev kho cua sov:
1.Kev kho cua sov: Cov hlau yog rhuab mus rau qhov kub thiab txias (feem ntau nyob ib ncig ntawm 1000 ° C mus rau 1100 ° C) kom yaj cov alloying ntsiab (xws li txhuas, tooj liab, los yog niobium) rau hauv ib qho khoom tov.
2. Kev laus: Tom qab quenching (ceev txias), cov hlau yog hnub nyoog ntawm qhov kub thiab txias (nyob ib ncig ntawm 500 ° C mus rau 700 ° C). Qhov no txhawb cov nag lossis daus ntawm cov khoom tawv tawv uas cuam tshuam kev txav mus los, yog li ntxiv dag zog rau cov khoom siv.
3.Composition: Cov dej nag-hardened stainless hlau feem ntau yog alloyed nrog cov ntsiab lus xws li tooj liab, txhuas, niobium, titanium, los yog molybdenum, uas ua rau cov nag lossis daus ntawm cov theem nyuaj uas txhim kho cov hlau lub zog.
Qib: Ib qho piv txwv zoo ntawm nag lossis daus-hardened stainless hlau yog 17-4 PH stainless hlau, uas muaj hlau, chromium, npib tsib xee, thiab tooj liab. Lwm cov qib, xws li 15-5 PH thiab 13-8 Mo, kuj tseem siv tau rau hauv cov ntawv thov uas yuav tsum muaj kev sib xyaw ua ke ntawm lub zog siab thiab corrosion kuj.
Daim ntawv thov: Precipitation-hardened stainless hlau yog dav siv nyob rau hauv kev lag luam uas ob qho tib si siab zog thiab corrosion kuj tseem ceeb, xws li hauv:
1.Aerospace: Aircraft Cheebtsam, turbine hniav, fasteners.
2. Kev kho mob: Cov cuab yeej phais, implants.
3.Chemical processing: Cov twj tso kua mis, li qub, thiab lwm yam khoom raug cuam tshuam rau qhov chaw hnyav.
4. Marine: Cheebtsam raug rau cov dej ntsev ib puag ncig.
1. Qhov zoo:
Lub zog siab piv rau qee cov cuab yeej steel.
Zoo heev tiv thaiv corrosion thiab oxidation, tshwj xeeb tshaj yog nyob rau hauv high-temperature thiab aggressive ib puag ncig.
Zoo formability thiab machinability nyob rau hauv cov tshuaj-kho mob.
2. Disadvantages:
Yuav ua tau kim dua lwm yam stainless hlau vim alloying ntsiab thiab ua.
Kev laus ntawm qhov kub thiab txias rau lub sijhawm ntev tuaj yeem ua rau embrittlement yog tias tsis ua tib zoo tswj.
Piv txwv Qib ntawm Precipitation-Hardening Stainless Steels:
1.17-4 PH (tseem hu ua 630): Muaj li ntawm 17% chromium, 4% nickel, thiab 4% tooj liab. Qib no yog ib qho ntawm feem ntau siv thiab muaj kev sib xyaw ua ke ntawm cov khoom siv zoo thiab kev tiv thaiv corrosion.
2.15-5 PHN: Zoo ib yam li 17-4 PH tab sis nrog me ntsis dua toughness thiab corrosion kuj, feem ntau siv nyob rau hauv aerospace thiab tshuaj industries.
3.13-8 Mod: Muaj kwv yees li ntawm 13% chromium, 8% npib tsib xee, thiab molybdenum, muab cov kev ntxhov siab zoo tshaj plaws tiv thaiv corrosion.
Nyob rau hauv cov ntsiab lus, nag lossis daus-hardening stainless hlau yog cov ntaub ntawv muaj ntau yam uas ua ke nrog qhov zoo ntawm cov hlau tsis muaj corrosion kuj nrog kev txhim kho cov khoom siv zoo li lub zog siab, ua rau lawv tsim nyog rau kev thov hauv ntau qhov kev lag luam.
