Hauv kev kho cua sov ntawm forging, vim yog lub zog loj ntawm lub qhov cub cua sov thiab lub sij hawm ntev rwb thaiv tsev, lub zog noj yog loj heev nyob rau hauv tag nrho cov txheej txheem, nyob rau hauv lub sij hawm ntev, yuav ua li cas txuag lub zog nyob rau hauv lub tshav kub kev kho mob ntawm forging yog ib qho teeb meem nyuaj.

Lub thiaj li hu ua "zero rwb thaiv tsev" quenching, yog taw tes rau lub forging cua sov, nws nto thiab cov tub ntxhais mus cuag lub quenching cua sov kub, tsis muaj rwb thaiv tsev, tam sim ntawd quenching txias txheej txheem.Raws li cov tsoos austenitic txoj kev xav, lub forging yuav tsum muaj ib tug ntev rwb thaiv tsev lub sij hawm nyob rau hauv lub cua sov txheej txheem, thiaj li mus ua kom tiav lub nucleation thiab kev loj hlob ntawm cement. Lub homogenization ntawm austenitic.Qhov tam sim no quenching thiab cua sov tshuab ntawm forgings yog tsim nyob rau hauv cov kev taw qhia ntawm no txoj kev xav.Piv nrog rau tam sim no quenching txheej txheem, "zero heat preservation" quenching txuag lub sij hawm ntawm tshav kub preservation yuav tsum tau los ntawm homogenization ntawm austenitic qauv, tsis tsuas yog yuav txuag tau 20%-30% efficiency, tab sis kuj yuav txo tau 20% - 30% efficiency. qhov tsis xws luag ntawm oxidation, decarbonization, deformation thiab lwm yam, uas yog qhov tsim nyog rau kev txhim kho cov khoom zoo.

Thaum cov pa roj carbon steel thiab cov hlau tsis tshua muaj cua sov rau Ac1 lossis Ac2, cov txheej txheem homogenization ntawm austenite thiab kev sib cais ntawm carbides nyob rau hauv pearlite yog sai dua.Thaum cov hlau loj belongs rau nyias ib feem ntau, kev xam lub sij hawm cua sov tsis tas yuav xav txog lub thermal rwb thaiv tsev, uas yog, kom ua tiav xoom thermal rwb thaiv tsev daim quenching.Piv txwv li, thaum lub thickness ntawm 0 4 hli tsis muaj ntau tshaj li 0. Nyob rau hauv cov huab cua rauv, qhov kub ntawm qhov saum npoo thiab cov tub ntxhais yuav luag txog tib lub sijhawm, yog li nws lub sijhawm sib xws tuaj yeem tsis quav ntsej, piv nrog cov txheej txheem tsim khoom ib txwm muaj (r = aD) nrog cov cua kub loj coefficient, tuaj yeem txo los ntawm ze li ntawm 20% -25% quenching cua sov lub sij hawm.

Kev soj ntsuam theoretical thiab kev sim pom tau hais tias nws muaj peev xwm txais yuav "zero rwb thaiv tsev" hauv quenching thiab normalizing cua sov ntawm cov qauv steel.Tshwj xeeb, 45, 45 mn2 carbon structural steel los yog ib lub caij alloy structural steel, kev siv "zero rwb thaiv tsev" txheej txheem tuaj yeem ua kom cov khoom siv hluav taws xob ntawm cov kev xav tau; 45, 45 mn2 carbon structural steel lossis ib qho khoom siv hlau hlau, siv cov txheej txheem "zero rwb thaiv tsev" tuaj yeem ua kom cov khoom siv ntawm cov khoom siv; "zero rwb thaiv tsev" cua sov tshaj li cov cua sov ib txwm muaj peev xwm txuag tau cua sov lub sij hawm ntawm txog 50%, tag nrho lub zog txuag ntawm 10% -15%, txhim kho cov efficiency ntawm 20% -30%, tib lub sij hawm "zero rwb thaiv tsev" txheej txheem quenching yuav pab refine grain, txhim kho lub zog.

(Los ntawm: 168 forgings net)