Hardenability thiab hardenability yog cov Performance indexes uas characterize lub quenching peev xwm ntawmforgings, thiab lawv kuj yog lub hauv paus tseem ceeb rau kev xaiv thiab siv cov khoom siv.Hardenabilityyog qhov siab tshaj plaws hardness uas aforgingtuaj yeem ua tiav raws li cov xwm txheej zoo tagnrho.Qhov tseem ceeb ntawm kev txiav txim siab hardening degree ntawmforgingyog cov ntsiab lus carbon ntawmforging, los yog ntau dua precisely cov ntsiab lus carbon ntawm cov khoom tov nyob rau hauv austenite thaum quenching thiab cua sov. Qhov siab dua cov ntsiab lus carbon yog, qhov siab dua qhov hardening degree ntawm steel yuav yog.Txawm hais tias cov alloying ntsiab nyob rau hauv steel muaj me ntsis cuam tshuam rau hardenability ntawm steel, lawv muaj zoo cuam tshuam rau hardenability ntawm hlau.
Hardenability yog tus yam ntxwv uas txiav txim siab qhov tob thiab hardness faib ntawm cov hlau hardened nyob rau hauv cov ntaub ntawv teev tseg.Qhov ntawd yog, lub peev xwm kom tau qhov tob ntawm lub hardened txheej thaum cov hlau yog hardened, uas yog ib tug inherent khoom ntawm steel.Hardenability tiag tiag qhia qhov yooj yim uas austenite yuav hloov dua siab tshiab rau martensite thaum cov hlau yog quenched.Nws yog feem ntau criticized nyob rau hauv lub steel stability. quenching cua txias tus nqi hauvforged hlau.

Tom qab quenching, cov qauv metallographic thiab hardness faib curves raug soj ntsuam ntawm qhov hla ntawm qhov nruab nrab cua txias. Cov kab kab yog martensite thiab cov seem yog muab faib ua cov cheeb tsam uas tsis yog Martensite, piv txwv li, cov qauv ua ntej quenching.Nws tuaj yeem pom los ntawm daim duab tias thaj tsam martensite ntawm steel bar ntawm sab xis yog tob dua, yog li nws cov hardenability zoo dua, lub martensite hardness ntawm cov khoom nyob rau sab laug yog siab dua, uas yog, hardening yog zoo dua.Qhov txias npaum li cas ntawm qhov chaw ntawm qhov chaw forging. yog qhov siab tshaj plaws, thiab qhov txias txias yuav txo qis thaum qhov chaw mus txog qhov chaw. Yog tias qhov txias txias ntawm qhov chaw thiab qhov nruab nrab ntawm qhov forging yog siab dua qhov tseem ceeb ntawm qhov txias txias ntawm cov hlau forging, cov qauv martensite tuaj yeem tau raws tag nrho cov seem ntawm forging, uas yog, cov hlau forging yog kiag li quenched.Yog hais tias lub hauv paus yog qis dua qhov tseem ceeb ntawm qhov txias txias, martensite tau txais ntawm qhov chaw thiab cov ntaub so ntswg uas tsis yog-Martensitic tau txais nyob rau hauv lub plawv.
Hauv kev tsim khoom, qhov zoo hardenability ntawm steelforgingsFeem ntau yog qhia los ntawm qhov tob ntawm cov txheej txheem hardening, uas yog, ntsug nrug ntawm qhov chaw ntsuas mus rau 50% (ntim feem) ntawm martensite.Nws kuj tseem siv tau los ntsuas qhov kev ncua deb ntawm qhov saum npoo mus rau qhov tshwj xeeb hardness los qhia qhov tob ntawm cov txheej txheem hardening.Piv txwv li, induction hardening qhov tob (DS) thiab tshuaj kho cua sov ntsuas qhov tob ntawm qhov tob (DC).
Kev faib khoom ntawm cov khoom siv hluav taws xob tom qab quenching thiab tempering ntawmforgingsnrog sib txawv hardenability yog qhia nyob rau hauv daim duab.High hardenability ntawm nws mechanical zog raws tus ntoo khaub lig seem yog uniform tis, thiab quench nkag mus rau hauv lub siab, tsis tshua muaj mechanical zog ntawm lub plawv, toughness yog qis dua.Qhov no yog vim hais tias tom qab temperedhlau forgingsnrog rau siab hardenability, lawv cov qauv ntawm nto mus rau sab hauv yog granular tempered Soxhlet, uas muaj siab bremsstrahlability, thaum hlau uas tsis muaj hardenability muaj flaccid ferrite ntawm nws lub plawv, uas muaj tsawg bremsstrahlability.
(ntawm duaan168.com)