410 vs 416 Stainless hlau: Martensitic Qib rau Machinability vs. Hardness

 

Dab tsi yog cov tshuaj muaj pes tsawg leeg, kev ua haujlwm tseem ceeb, thiab kev siv ntawm 410 thiab 416 yog dab tsi?
Qib 410 (UNS S41000) yog ib qho yooj yim 12% chromium martensitic steel tsis muaj cov ntsiab lus ntxiv rau kev ua haujlwm. Nws tuaj yeem hardened los ntawm kev kho cua sov kom ua tiav lub zog zoo thiab hnav tsis kam. Qib 416 (UNS S41600) hloov kho 410 lub hauv paus los ntawm kev ntxiv cov sulfur (Ntau dua lossis sib npaug rau 0.15%) lossis selenium, tsim cov kev suav nrog uas tawg cov chips thaum lub sijhawm ua haujlwm. Qhov no ua rau 416 yog ib qho ntawm cov hlau tsis zoo tshaj plaws . 410 yog siv rau li qub, twj tso kua mis, cutlery, thiab fasteners . 416 yog teev rau siab - ntim ntau lawm ntawm screws, ceev, zog, thiab fittings ntawm tsis siv neeg ntsia hlau tshuab qhov twg complex machining yuav tsum tau.

Qhov sib ntxiv ntawm sulfur lossis selenium hauv 416 cuam tshuam nws cov khoom siv kho tshuab thiab corrosion piv rau 410 li cas?
Cov sulfur lossis selenium ntxiv tsim cov manganese sulfide / selenide suav nrog hauv cov hlau matrix. Cov kev suav nrog no ua raws li cov chips tawg thiab cov roj lubricants hauv lub sijhawm ua haujlwm, txhim kho kev ua haujlwm zoo thiab lub neej cuab yeej. Txawm li cas los xij, cov kev suav nrog tib yam no tsim kev tsis sib xws uas txo cov ductility, cuam tshuam rau lub zog, thiab qaug zog zog piv rau 410. Qhov tseem ceeb tshaj, lawv txo qis corrosion kuj, tshwj xeeb tshaj yog tsis kam rau pitting, thiab ua rau cov hlau tseem ceeb unweldable vim muaj kev pheej hmoo ntawm kub tawg . 410, thaum nyuaj rau lub tshuab, muaj zoo dua txhua yam - nyob ib ncig ntawm corrosion.

Nyob rau hauv qhov kev tsim scenarios yog qhov tseem ceeb los xaiv 416 tshaj 410, thiab rov ua dua?
Xaiv 416 thaum qhov kev sib tw tseem ceeb ntawm kev tsim khoom yog machining, tshwj xeeb tshaj yog rau kev ua haujlwm nyuaj, siab - ntim cov khoom tsim los ntawm cov tshuab tsis siv neeg. Lub sij hawm thiab cov cuab yeej kev txuag nqi yuav nyob deb tshaj qhov kev lag luam khoom vaj khoom tsev - tawm. Xaiv 410 thaum cov khoom yuav tsum tau zoo toughness, weldability, los yog zoo dua corrosion kuj, txawm hais tias nws txhais tau tias qeeb qeeb, kim machining thiab ua tau kub. Piv txwv li, lub cev lub cev kev cai yuav yog 410, thaum ntau txhiab tus zoo tib yam teeb tsa rau lub valve yuav yog 416.

Dab tsi yog qhov tseem ceeb rau kev kho cua sov thiab ua kom tiav cov qib no?
410 yog niaj hnub kho cua sov (hardened thiab tempered) kom ua tiav nws cov kev pabcuam kev ua haujlwm . 416 kuj tuaj yeem kho cua sov kom ua kom tawv tawv, tab sis cov txheej txheem yuav tsum tau saib xyuas ntau dua vim tias cov kev sib xyaw ua ke tuaj yeem ua rau muaj kev cuam tshuam tsis zoo thaum cua sov. Ob qib yog raug rau decarburization. Rau kev ua tiav, 416 tuaj yeem ua tiav lub tshuab zoo ncaj qha, thaum 410 yuav xav tau ntau kauj ruam. Ob qib tsis haum rau daim iav polish yog tias muaj sulfide stringers (hauv 416), raws li cov no yuav pom.

Cov lus nug kawg dab tsi uas tus neeg yuav khoom nug lawv tus neeg muag khoom thaum nrhiav 410 lossis 416?
Rau 416, cov lus nug tseem ceeb yog: "Puas yog 416 nrog sulfur (S41600) lossis selenium (S41623)?" Selenium-cov kabmob 416 muab kev ua haujlwm zoo dua thiab ua kom tiav. Rau ob qib, lees paub qhov yuav tsum tau muaj: annealed rau machining, los yog ua ntej- hardened. Qhov tseem ceeb tshaj plaws, cov neeg yuav khoom yuav tsum xyuas kom meej qhov kev xaiv qib sib haum nrog cov haujlwm ua haujlwm: tsis txhob hloov 416 rau 410 hauv ib qho welded, qauv, lossis corrosion- daim ntawv thov tseem ceeb kom txuag tau ntawm machining nqi, vim nws yuav ua rau ua tsis tiav ntxov.