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 tis ntawm cov hlau hardened nyob rau hauv cov kev mob uas tau teev tseg.Yog li ntawd, lub peev xwm kom tau qhov tob ntawm hardened txheej thaum steel yog hardened, uas yog ib tug inherent khoom ntawm steel.Hardenability tiag tiag qhia txog lub hardenability. yooj yim nrog uas austenite tuaj yeem hloov mus rau martensite thaum cov hlau yog quenched.Nws yog feem ntau cuam tshuam nrog kev ruaj ntseg ntawm supercooled austenite hauv hlau, lossis rau qhov tseem ceeb. quenching cua txias tus nqi hauvforged hlau.

Tom qab quenching, cov qauv metallographic thiab hardness tis curves raug soj ntsuam nyob rau ntawm tus ntoo khaub lig seem 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 forging seem txawv ntawm qhov chaw mus rau qhov chaw thaum quenching.Qhov txias ceev ntawm qhov chaw. 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 txais los ntawm tag nrho cov seem ntawm forging, uas yog, cov hlau forging yog kiag li quenched. qhov nruab nrab 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 nyob hauv plawv, qhia tias cov hlau forging tsis tau quenched los ntawm.
Hauv kev tsim khoom, qhov zoo hardenability ntawm steelforgingsfeem ntau yog qhia los ntawm qhov tob ntawm cov txheej txheem hardening zoo, uas yog, qhov ntsug nrug ntawm qhov ntsuas mus rau 50% (ntim feem) ntawm martensite. qhia qhov tob ntawm cov txheej txheem hardening zoo.Piv txwv li, induction hardening qhov tob (DS) thiab tshuaj kho cua sov qhov tob (DC) yog ntsuas los ntawm txoj kab ntsug ntawm qhov chaw mus rau qhov tshwj xeeb hardness.
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)