High alloy hlauprecision me me txoj kab uas hla seamless steel yeeb nkabyuav luag tsis siv cov txheej txheem quenching ncaj qha;Thaum kom muaj nuj nqis ntawm cov austenite khaws cia nruj me ntsis, cov hlau tsis tshua muaj hlau yuav tsis ncaj qha quenched.Ib qho teeb meem raug yog cov tsos ntawm ripples ntawm qhov chaw ntawm aprecision me me txoj kab uas hla seamless steel yeeb nkab(xws li kauv los yog hypoid gears) nyob rau hauv kev ua hauj lwm load.
Txhawm rau txo qhov ntim ntawm austenite thiab deformation thaum lub sijhawm ncaj qha quenching, ua ntej txias tuaj yeem siv los ua kom Ar1 kub tom qab carburizing thiab tom qab ntawd quenching.Lub precision me me txoj kab uas hla seamless steel yeeb nkab kuj tuaj yeem quenched ua ntej thaum nws raug xa mus rau lub cub tawg me ntsis siab dua Ar1 kub.Tom qab carburizing thiab quenching, qhov precision me me caliber seamless steel yeeb nkab kuj tuaj yeem ua kom sov rau qhov kub siab tshaj qhov saum npoo Ac1, ua kom zoo dua cov nplej thiab txo qhov seem ntawm austenite.
Lub precision me me txoj kab uas hlatxias dov seamless steel yeeb nkabyog ncaj qha quenched kom tau lub siab tshaj plaws lub zog thiab hardness, tab sis lub toughness tsis siab.Lub hardness ntawm carburized txheej tuaj yeem ntsuas nrog cov ntaub ntawv.Lub hardness yuav raug txo vim muaj cov residual austenite nyob rau hauv precision me me seamless yeeb nkab ntawm high alloy steel.Txoj kev no tseem tuaj yeem txo cov cementite ntawm cov ciam teb.Thaum machining lub carburized nto ntawm precision me me caliberseamless steel yeeb nkabyog yuav tsum tau, qeeb txias los yog annealing yuav tsum tau saws.
Yog hais tias lub siab hardenability steel raug xaiv los yog cuam tshuam los ntawm cov khoom siv, txawm tias qhov txias txias yog qeeb, qhov saum npoo ntawm lub taub me me precision ci tuab phab ntsa yeeb nkab tseem muaj qhov hardness siab.Hauv qhov no, kev kho softening yuav tsum tau txais yuav.Txhawm rau kom tsis txhob muaj cov nag lossis daus ntawm network carbide, qhov nruab nrab cua txias yuav tsum tau txais.Siv qee qhov kev ceev faj kom tsis txhob decarburization thaum lub caij txias txias.Cov dej quenched steel yuav tsum tau siv tom qab.Tom qab carburizing, qeeb txias los yog roj quenching txoj kev yuav siv tau los kho cov nplej nyob rau hauv qhov chaw ntawm precision me me seamless steel yeeb nkab tsis loj deformation los yog tawg.
Nyob rau hauv cov txheej txheem kev kho cua sov ntawm ntau lub cua sov quenching, carburizing thiab txias ua raws li los ntawm reheating quenching, nto quenching tuaj yeem pom tau los ntawm nto quenching, thiab cov txheej txheem no kuj siv tau.Rau precision me me seamless steel kav nrog cov ntsiab lus alloy siab, nws yog qhov zoo dua los siv cov txheej txheem ze tshaj plaws rau quenching ncaj qha, uas yog, rov ua kom sov rau 15 ~ 25 ℃ (25 ℃ ~ 50 ℃) siab tshaj qhov nruab nrab qhov ntsuas kub (ntawm chav kawm, dhau ntawm qhov kev hloov pauv saum npoo av).
Cov txheej txheem kev kho cua sov ua kom lub zog ntawm cov tub ntxhais ntawm cov kab me me uas muaj qhov siab-precision seamless yeeb nkab thiab muaj qhov zoo toughness.Yuav luag tag nrho cov carbide seem ntawm qhov chaw yog yaj.Txawm hais tias residual austenite cov ntsiab lus ntawm cov txheej txheem precision me me txoj kab uas hla txias dov seamless steel yeeb nkab yog tsawg tshaj li ntawm ncaj qha quenching, nws yuav raug khaws cia ib nrab.Lub deformation yog loj tshaj qhov ncaj qha quenching, tab sis nyob rau hauv qhov kev siv tau.Raws li nrog ncaj qha quenching, txoj kev no tsis yog siv rau cov pa roj carbon zoo tib yam.
Tom qab qeeb txias lossis quenching, cov kua hlau tuaj yeem rov ua kom sov rau theem hloov kub me ntsis siab dua li ntawm cov txheej carburized.Piv txwv li, lub me me txoj kab uas hla alloy precision seamless yeeb nkab yuav tsum reheated tom qab carburizing thiab qeeb txias, vim hais tias nws tsis tuaj yeem refine nplej thiab quenching, kom nws hardness yog tsawg, deformation yog me me, thiab toughness yog nruab nrab;Cov txheej saum npoo muaj undissolved carbides, yog li nws muaj siab hardness thiab brittleness;Piv txwv li, lub precision me me seamless steel yeeb nkab yog reheated tom qab carburizing thiab quenching, thiab cov nplej yog tag nrho refined.Lub chaw muaj siab toughness, tsawg hardness, thiab nto tsis muaj network cementite, yog li lub hardness yog siab thiab toughness yog zoo, tab sis qhov tsis zoo yog qhov deformation loj.
Post lub sij hawm: Dec-06-2022