Kev kub ceev cua sov los ntawm induction cua sov System

Ib qho ntawm cov kev txhim kho tsis ntev los no hauv kev kho cua sov yog daim ntawv thov induction cua sov rau localized nto hardening. Cov kev nce qib tau tsim los ntawm kev siv cov zaus tam sim no tsis muaj dab tsi luv luv ntawm qhov zoo tshaj plaws. Pib ib lub sij hawm luv luv dhau los ua ib txoj hauv kev ntev-nrhiav-tom qab txoj kev hardening bearing nto ntawm crankshafts (ntau lab ntawm cov no yog nyob rau hauv kev siv tag nrho cov sij hawm kev pab cov ntaub ntawv), hnub no pom no heev xaiv surfacing hardening txoj kev uas ua rau hardened cheeb tsam ntawm ib tug multiplicity ntawm ntu. Txawm li cas los xij, txawm hais tias niaj hnub no qhov dav ntawm daim ntawv thov, induction hardening tseem nyob rau hauv nws cov me nyuam mos theem. Nws yuav siv tau rau kev kho cua sov thiab hardening ntawm cov hlau, cua sov rau forging los yog brazing, los yog soldering ntawm cov hlau zoo sib xws thiab sib txawv, yog unpredictable.

Induction hardening ua rau zus tau tej cov khoom nyob rau hauv lub zos hardened steel khoom nrog lub Desired degree ntawm qhov tob thiab hardness, qhov tseem ceeb metallurgical qauv ntawm cov tub ntxhais, demarcation cheeb tsam, thiab hardened rooj plaub, nrog ib tug tswv yim tsis muaj distortion thiab tsis muaj scale tsim. Nws tso cai rau cov cuab yeej tsim qauv uas lav kev ua haujlwm ntawm tag nrho cov haujlwm kom ua tiav cov kab ntau lawm. Lub sij hawm cycles ntawm tsuas yog ob peb vib nas this yog tswj los ntawm kev tswj tsis siv neeg lub hwj chim thiab cais thib ob cua sov thiab quenching intervals indispensable rau cov creation ntawm facsimile tau los ntawm exacting tshwj xeeb fixations. Cov khoom siv induction hardening tso cai rau tus neeg siv los ua kom tawv tawv tsuas yog qhov yuav tsum tau ua ntawm feem ntau cov khoom siv hlau thiab yog li tuav cov khoom qub thiab lub zog; kom tawv cov khoom ntawm cov qauv tsim intricate uas tsis tuaj yeem kho tau rau lwm txoj hauv kev; txhawm rau tshem tawm cov khoom siv kim kim xws li tooj liab plating thiab carburizing, thiab cov nqi pheej yig dua thiab kev ua haujlwm tu; txo tus nqi ntawm cov khoom siv los ntawm kev xaiv dav hlau los ntawm kev xaiv; thiab ua kom cov khoom siv ua tiav tag nrho yam tsis muaj qhov tsim nyog ntawm kev ua haujlwm tiav.

Rau cov neeg soj ntsuam xws li nws yuav tshwm sim tias induction hardening yog ua tau los ntawm qee lub zog hloov pauv tshwm sim hauv thaj tsam inductive ntawm tooj liab. Cov tooj liab nqa cov hluav taws xob tam sim no ntawm qhov ntau zaus thiab, nyob rau ib ntus ntawm ob peb vib nas this, qhov saum npoo ntawm ib daim hlau muab tso rau hauv cheeb tsam energized no yog rhuab rau nws qhov tseem ceeb thiab quenched kom zoo hardness. Rau cov chaw tsim khoom ntawm cov cuab yeej siv rau txoj kev hardening no txhais tau hais tias daim ntawv thov ntawm qhov tshwm sim ntawm hysteresis, eddy tam sim no, thiab cov nyhuv ntawm daim tawv nqaij kom ua tau zoo ntawm cov khoom hauv cheeb tsam ntawm qhov tawv tawv.

Cov cua sov yog ua tiav los ntawm kev siv cov khoom siv hluav taws xob siab. Tshwj xeeb xaiv ntau zaus los ntawm 2,000 mus rau 10,000 cycles thiab nce mus txog 100 cycles tau siv ntau lub sijhawm tam sim no. Tam sim no ntawm no xwm nyob rau hauv ntws los ntawm ib tug inductor ua ib tug high-frequency magnetic teb nyob rau hauv lub cheeb tsam ntawm lub inductor. Thaum cov khoom sib nqus xws li hlau tau muab tso rau hauv daim teb no, muaj lub zog tawg hauv cov hlau uas ua kom sov. Cov molecules nyob rau hauv cov hlau sim ua kom lawv tus kheej nrog lub polarity ntawm daim teb no, thiab nrog rau qhov kev hloov no ntau txhiab lub sij hawm ib ob, ib tug loj npaum li cas ntawm internal molecular kev sib txhuam yog tsim los ntawm lub ntuj nyiam rau cov hlau los tiv thaiv kev hloov. Hauv qhov no, lub zog hluav taws xob hloov pauv, los ntawm qhov nruab nrab ntawm kev sib txhuam, mus rau hauv tshav kub.

Txawm li cas los xij, txij li lwm tus yam ntxwv tseem ceeb ntawm cov zaus tam sim no yog kom mloog zoo rau ntawm nws tus neeg xyuas pib, tsuas yog cov txheej txheej saum npoo tau ua kom sov. Qhov kev nyiam no, hu ua "cov nyhuv ntawm daim tawv nqaij", yog qhov ua haujlwm ntawm qhov zaus thiab, lwm yam sib npaug, ntau zaus siv tau rau hauv qhov tob tob. Kev sib txhuam ua kom muaj cua sov hu ua hysteresis thiab pom tseeb yog nyob ntawm cov hlau nplaum zoo ntawm cov hlau. Yog li, thaum qhov kub thiab txias tau dhau qhov tseem ceeb ntawm cov hlau tsis yog hlau nplaum, tag nrho cov cua sov hysteretic ceases.

Muaj ib qho ntxiv ntawm cov cua sov vim yog cov eddy tam sim no uas ntws hauv cov hlau vim yog qhov hloov pauv sai hauv lub tshav pob. Nrog rau kev tiv thaiv ntawm cov hlau nce nrog qhov kub thiab txias, qhov kev siv ntawm qhov kev ua no tau txo qis thaum cov hlau ua kom sov, thiab tsuas yog ib feem ntawm nws qhov "txias" tus nqi qub thaum qhov kub thiab txias tau ncav cuag.

Thaum qhov kub ntawm qhov inductively rhuab steel bar tuaj txog ntawm qhov tseem ceeb, cua sov vim eddy tam sim no txuas ntxiv ntawm tus nqi txo qis heev. Txij li thaum tag nrho qhov kev txiav txim mus rau hauv cov khaubncaws sab nraud povtseg, tsuas yog qhov ntawd cuam tshuam. Cov yam ntxwv tseem ceeb yog khaws cia, qhov tawv tawv tau ua tiav los ntawm quenching thaum ua tiav cov tshuaj carbide tau nyob hauv thaj chaw saum npoo. Kev siv hluav taws xob txuas ntxiv ua rau muaj kev nce hauv qhov tob ntawm hardness, vim tias txhua txheej ntawm cov hlau raug coj mus rau qhov kub thiab txias, qhov ceev tam sim no hloov mus rau txheej hauv qab uas muaj qhov ua haujlwm qis dua. Nws yog qhov pom tseeb tias kev xaiv ntawm cov zaus kom raug, thiab kev tswj xyuas lub zog thiab lub sijhawm cua sov yuav ua kom tiav ntawm txhua qhov kev xav tau ntawm qhov chaw hardening tau.

Metallurgy ntawm Cua Kub Induction

Cov cwj pwm txawv txawv ntawm cov hlau thaum rhuab inductively thiab cov txiaj ntsig tau txais txiaj ntsig kev sib tham ntawm metallurgy koom nrog. Carbide tov tus nqi tsawg tshaj li ib ob, hardness siab dua qhov uas ua los ntawm kev kho cua sov, thiab ib tug nodular hom martensite yog cov ntsiab lus ntawm kev xav.
uas faib cov metallurgy ntawm induction hardening li "sib txawv". Tsis tas li ntawd, decarburization nto thiab grain loj hlob tsis tshwm sim vim yog lub voj voog luv luv.

Induction cua sov ua ib qho hardness uas tau khaws cia los ntawm 80 feem pua ​​​​ntawm nws qhov tob, thiab los ntawm qhov ntawd, maj mam txo los ntawm kev hloov chaw mus rau qhov qub hardness ntawm cov hlau raws li pom nyob rau hauv cov tub ntxhais uas tsis tau cuam tshuam. Daim ntawv cog lus yog li no zoo tagnrho, tshem tawm txhua lub caij nyoog ntawm spalling lossis kuaj xyuas.

Ua kom tiav cov tshuaj carbide thiab homogeneity raws li pov thawj los ntawm qhov siab tshaj plaws hardness tuaj yeem ua tiav nrog lub sijhawm cua sov tag nrho ntawm 0.6 thib ob. Ntawm lub sijhawm no, tsuas yog 0.2 mus rau 0.3 thib ob yog qhov tseeb tshaj qhov tseem ceeb. Nws yog qhov nthuav kom nco ntsoov tias cov khoom siv induction hardening yog nyob rau hauv txhua txhua hnub ua haujlwm ntawm lub hauv paus tsim khoom nrog ua tiav cov tshuaj carbide, uas tshwm sim los ntawm lub voj voog cua sov thiab quenching, tag nrho lub sij hawm uas tsawg dua 0.2 thib ob.

Qhov zoo nodular thiab ntau homogeneous martensite uas tshwm sim los ntawm induction hardening yog yooj yim pom nrog carbon steels dua nrog hlau alloy vim hais tias ntawm nodular tsos ntawm feem ntau alloy martensite. Cov qauv zoo no yuav tsum muaj rau nws lub hauv paus chiv keeb austenite uas yog tshwm sim los ntawm kev nthuav dav carbide ntau dua li tau txais nrog cov cua sov. Xyaum txoj kev loj hlob sai ntawm qhov kub thiab txias thoob plaws tag nrho cov microstructure ntawm alpha hlau thiab hlau carbide tshwj xeeb yog qhov tsim nyog rau cov tshuaj carbide sai thiab kev faib tawm ntawm cov khoom siv uas muaj raws li nws cov khoom tsis tuaj yeem ua kom zoo ib yam li austentite. Tsis tas li ntawd, kev hloov pauv ntawm cov qauv no mus rau martensite yuav tsim cov martensite uas muaj cov yam ntxwv zoo sib xws thiab muaj kev tiv thaiv zoo rau hnav lossis nkag mus rau cov cuab yeej.

kev kub ceev cua sov los ntawm induction