1, Kev ua haujlwm hloov tom qab kev kho kho
Refine grain loj: kom sov lub steel yeeb nkab rau ib tug kub tshaj plaws austenitization los ntawm kev coj ua, thiab txias nws hauv huab cua tom qab rwb thaiv tsev. Cov txheej txheem no tuaj yeem kho cov noob qoob loo loj ntawm cov hlau thiab ua rau cov qauv sab hauv ntau dua. Piv txwv li, nws tuaj yeem daws teeb meem los yog tshem tawm cov qauv banded thiab sib xyaw ua ke ntawm cov kav hlau, ua rau micr steel kav ntau dua thiab txhim kho lawv cov kev ua tau zoo dua qub.
Txhim kho tej kev ua tiav: rau nruab nrab C steel thiab qis {{{{{{{{}} Alloy altomoy tuaj yeem hloov cov annealing los txhim kho cov kev txiav tawm ntawm cov kav hlau steel. Lub caij no, ib txwm ua tuaj yeem hloov pauv kev ntxhov siab rau qee qhov kev ntxhov siab sab hauv, ua cov yeeb nkab steel sab hauv ntau ruaj khov thaum ua tiav lossis siv.
2, Ua tau zoo hloov tom qab kev kho annealing
Txhim kho cov yas thiab tawv tawv:
Annealing yog cov txheej txheem ntawm cov kav kub steel hlau mus rau qhov kub thiab txias saum toj no lossis qis dua qhov tseem ceeb (AC3 lossis AC1 maj mam txias tom qab lub rwb thaiv tsev. Feem ntau, siab c, tsawg alloy, thiab alloy steel kav dej tuaj yeem txo lawv cov qauv kev ntxhov siab thiab tsis sib xws, thiab pab txhawb cov hlau yeeb nkab machining. Piv txwv li, ua rau nws yooj yim rau kev nyuaj yav dhau los thiab nkig hlau kav dej kom yauv yooj yim cov txheej txheem xws li khoov thiab ncab.
Nws kuj tseem tuaj yeem txhim kho cov khoom siv hlau ua kom muaj zog ntawm cov kav hlau, ruaj khov lossis tiv thaiv kev hloov pauv hlau, thiab tiv thaiv kev hloov pauv ntawm cov qauv hlau thaum siv.
3, Kev ua tau zoo hloov tom qab quenching kev kho mob
Kev txhim kho tawv heev:
Quenching yog txheej txheem ntawm cov hlau cua sov steel rau 30- hypeutsceg hlau) lossis 30-30℃rau cov qauv cua txias kom tau txais martensitic qauv (m) tom qab rwb thaiv tsev. Microstructure ntawm carbon hlau tom qab quenching yog tsim los ntawm martensite thiab qee qhov nyiaj ntawm seem ntawm Austenite. Martensitic Microstructure feem ntau muaj kev tawv tawv siab, yog li lub hardness, yog li lub hardness ntawm cov kav hlau steel tom qab quenching yuav nce ntxiv. Lub hardness ntau dua li hrc55 (txog ntawm HRC62) tom qab quenching yog suav tias yog tsim nyog (xws li seamless kav tom qab quenching).
Tab sis microstructure tom qab quenching ntau dua li cov nkev muaj ntau vim tias martensite nws tus kheej yog qhov nkig kev kho kom txhim kho kev kho kom nruj thiab lwm yam khoom.
Kev hloov pauv: Tom qab quenching, lub zog ntawm cov yeeb nkab steel yuav tseem yuav txhim kho vim yog lub zog siab ntawm cov martensic qauv. Txawm li cas los xij, yog tias cov txheej txheem quenching tsis yog tswj tau, xws li cov cua kub tsis txaus (rau cov qauv kev ua kom muaj zog, ua rau muaj kev txo qis hauv lub zog thiab hardness.
4, Kev Ua Tau Zoo Hloov Tom Qab Kev Kho Mob Ntshav
Txo Brittleness: Tempering yog kev kho mob thov rau quenched steel kav dej. Lub martensite qauv tom qab quenching muaj cov siab ua kom siab, thiab tempering tuaj yeem txo cov brittleness thiab txhim kho cov kav hlau hlau. Piv txwv li, qis {{- kub kub (150 {}}
Kho cov Hardness thiab lub zog: nyob ntawm qhov kub siab, lub hardness thiab lub zog ntawm cov yeeb nkab steel tuaj yeem hloov kho rau qee yam. Feem ntau hais lus, qhov siab dua qhov tempering kub, qis dua lub hardness thiab lub zog yuav ua kom muaj zog ntxiv, tab sis lub zog siv tau zoo dua, thiab cov khoom siv zoo dua yuav zoo dua.
