Electroplating thiab Retempering Test rau Hluav taws xob cua sov Tubes

Electroplating thiab Retempering Test rau Hluav taws xob cua sov Tubes

Feem ntau, cov khoom muaj hardenability zoo thiab lub hardness yuav muab sib npaug zos rau ntawm tus ntoo khaub lig-section ntawm cov ntsia hlau. Tsuav qhov hardness yog tsim nyog, lub zog thiab guaranteed kev nyuaj siab kuj yuav ua tau raws li qhov yuav tsum tau. Txawm li cas los xij, thaum lub hardenability ntawm cov khoom tsis zoo, txawm hais tias lub hardness yog tsim nyog raws li kev soj ntsuam raws li qhov chaw, lub zog thiab guaranteed kev nyuaj siab feem ntau tsis tau raws li qhov yuav tsum tau. Tshwj xeeb tshaj yog thaum lub deg hardness mus txog qhov tsawg kawg nkaus.

Yuav kom tswj tau lub zog thiab ua kom muaj kev ntxhov siab nyob rau hauv qhov tsim nyog, qhov kev txwv qis qis ntawm hardness feem ntau nce. Piv txwv li, lub hardness tswj ntau ntawm qib 8.8 yog 26 ~ 31HRC rau specifications hauv qab M16, thiab 28 ~ 34HRC rau specifications saum M16; Nws raug nquahu kom tswj hwm qib 10.9 hauv 36 ~ 39HRC. Rau cov neeg siab dua qib 10.9, nws yog lwm qhov teeb meem.

3, Retempering test

Bolts, screws, thiab studs ntawm qib 8.8 mus rau 12.9 yuav tsum tau mus rau qhov kev ntsuam xyuas tempering nrog qhov ntsuas kub tsawg kawg nkaus ntawm 10 degree thiab 30 feeb rwb thaiv tsev raws li kev tsim khoom tiag. Ntawm tib tus qauv, qhov sib txawv ntawm qhov nruab nrab hardness qhov tseem ceeb ntawm peb lub ntsiab lus ua ntej thiab tom qab kev xeem yuav tsum tsis pub tshaj 20HV.

Retempering test tuaj yeem tshawb xyuas qhov kev ua haujlwm tsis raug ntawm kev siv qhov kub thiab txias dhau mus rau qhov tsis tshua muaj siab txog qhov kev sib tw hardness vim tsis txaus quenching hardness, kom ntseeg tau tias cov khoom siv txhua yam ntawm cov khoom. Hauv particular, threaded fasteners ua los ntawm cov pa roj carbon tsawg martensite steel yog tempered ntawm qhov kub thiab txias. Txawm hais tias lwm yam khoom siv tshuab tuaj yeem ua tau raws li qhov yuav tsum tau ua, qhov seem elongation hloov pauv tau zoo heev thaum ntsuas qhov kev tiv thaiv kev ntxhov siab, deb tshaj 12.5 um. Thiab nyob rau hauv tej yam kev mob siv, tam sim ntawd puas yuav tshwm sim. Hauv qee lub tsheb thiab kev tsim kho bolts, tau muaj qhov tshwm sim ntawm kev tawg tam sim ntawd. Thaum qhov ntsuas kub qis tshaj plaws yog siv rau tempering, qhov tshwm sim saum toj no tuaj yeem txo qis. Txawm li cas los xij, yuav tsum tau saib xyuas tshwj xeeb thaum tsim qib 10.9 bolts nrog cov pa roj carbon tsawg martensite hlau.

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