Thick-walled stainless hlau kav muaj ntau yam zoo, xws li kub-kub oxidation tsis kam, muaj zog corrosion kuj, zoo yas, zoo heev vuam kev ua tau zoo, thiab lwm yam, thiab yog dav siv nyob rau hauv ntau yam civil industrial teb. Txawm li cas los xij, vim qhov tsis tshua muaj zog thiab hnav tsis kam ntawm stainless hlau, nws daim ntawv thov nyob rau hauv ntau zaus yuav raug txwv, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig uas muaj ntau yam xws li corrosion, hnav, thiab hnyav load muaj nyob thiab cuam tshuam rau ib leeg, kev pab cuam lub neej. stainless hlau cov ntaub ntawv yuav luv luv. Yog li, yuav ua li cas txhawm rau txhawm rau ua kom tawv tawv ntawm cov kav dej tuab-walled stainless hlau?

Tam sim no muaj ib txoj hauv kev los ua kom cov tawv tawv ntawm cov kav dej tuab los ntawm ion nitriding los txhim kho kev hnav tsis kam thiab yog li txuas ntxiv nws lub neej kev pab cuam. Txawm li cas los xij, cov kav dej austenitic stainless hlau tsis tuaj yeem ntxiv dag zog los ntawm theem hloov, thiab cov pa ion nitriding muaj qhov kub siab nitriding, uas siab dua 500 ° C. Chromium nitrides yuav precipitate nyob rau hauv nitriding txheej, ua rau stainless hlau matrix chromium-tsis zoo. Thaum lub saum npoo hardness yog ho nce, qhov saum npoo corrosion kuj ntawm cov yeeb nkab kuj yuav tsis muaj zog heev, yog li poob cov yam ntxwv ntawm tuab-walled stainless hlau kav.

Kev siv cov khoom siv DC pulse ion nitriding los kho cov kav dej austenitic steel nrog qis-kub ion nitriding tuaj yeem txhim kho qhov nyuaj ntawm cov kav dej tuab-walled steel kav thaum ua kom cov corrosion kuj tsis hloov, yog li ua rau lawv hnav tsis kam. Piv nrog rau cov ion nitriding kho cov qauv ntawm cov pa nitriding kub, cov ntaub ntawv sib piv kuj pom tseeb heev.

Qhov kev sim tau ua nyob rau hauv 30kW DC mem tes ion nitriding rauv. Cov tsis muaj DC pulse fais fab mov yog adjustable voltage 0-1000V, adjustable luag hauj lwm voj voog 15% -85%, thiab zaus 1kHz. Qhov ntsuas kub ntsuas qhov ntsuas kub yog ntsuas los ntawm lub ntsuas kub infrared IT-8. Cov khoom ntawm cov qauv yog austenitic 316 tuab-walled stainless hlau yeeb nkab, thiab nws cov tshuaj muaj pes tsawg leeg yog 0.06 carbon, 19.23 chromium, 11.26 npib tsib xee, 2.67 molybdenum, 1.86 manganese, thiab tus so yog hlau. Cov qauv loj yog Φ24mm × 10mm. Ua ntej qhov kev sim, cov qauv tau polished nrog dej xuab zeb nyob rau hauv lem kom tshem tawm cov roj stains, ces ntxuav thiab qhuav nrog cawv, thiab ces muab tso rau hauv nruab nrab ntawm lub cathode disk thiab nqus mus rau hauv qab 50Pa.

Lub microhardness ntawm cov txheej nitrided tuaj yeem ncav cuag siab tshaj 1150HV thaum ion nitriding tau ua ntawm austenitic 316 stainless hlau welded kav ntawm qhov kub thiab txias thiab cov pa nitriding. Cov txheej nitrided tau los ntawm qhov kub thiab txias ion nitriding yog thinner thiab muaj ib tug siab hardness gradient. Tom qab qhov kub thiab txias ion nitriding, hnav tsis kam ntawm austenitic hlau tuaj yeem nce ntxiv los ntawm 4-5 zaug, thiab kev tiv thaiv corrosion tseem tsis hloov. Txawm hais tias qhov hnav tsis kam tuaj yeem txhim kho los ntawm 4-5 zaug los ntawm ion nitriding ntawm cov pa nitriding kub, qhov kev tiv thaiv corrosion ntawm austenitic stainless hlau tuab-walled kav yuav raug txo rau qee yam vim tias chromium nitrides yuav los nag rau saum npoo.