Carbon steel seamless kavyog dav siv vim lawv lub zog siab thiab ruaj khov mechanical zog. Lawv feem ntau siv rau hauv kev lag luam xws li petrochemicals, kev tsim kho, aerospace, thiab kev tsim khoom. Txhawm rau txhim kho lawv cov kev ua tau zoo thiab kev ua tau zoo, kev kho annealing feem ntau yuav tsum tau ua. Annealing yog txheej txheem kev kho cua sov uas yuav maj mam ua kom sov cov khoom mus rau qhov kub thiab txias thiab tom qab ntawd txias nws los hloov nws cov qauv crystalline thiab txhim kho nws cov khoom siv kho tshuab.
BRISK STEEL yog cov kws tshaj lij carbon steel seamless yeeb nkab chaw tsim khoom, kom paub meej ntxiv, thov hu rau:sales@briskmetal.com
Hauv kev tsim cov pa roj carbon steel seamless kav, annealing tej yam kev mob ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab cov khoom zoo thiab kev ua haujlwm. Qhov tseem ceeb annealing parameter yog raws li nram no:
1. Qhov kub thiab txias
(1) Tag nrho Annealing
Tag nrho annealing suav nrog cua sov cov pa roj carbon steel seamless yeeb nkab rau qhov kub ntawm 30-50℃siab tshaj qhov kub tseem ceeb (Ac3). Rau cov pa roj carbon steel nrog cov ntsiab lus carbon ntawm 0.3% -0.6%, Ac3 kub yog kwv yees li 750-800 degree, txhais tau hais tias tag nrho cov annealing kub yog feem ntau teem ntawm 800-850 degree. Ntawm qhov kub no, tag nrho cov ferrite thiab cementite nyob rau hauv cov hlau recrystallize, refining lub grain qauv thiab tshem tawm cov yam ntxwv tsis xws luag. Cov txheej txheem no txo cov hardness ntawm cov yeeb nkab steel, yog li txhim kho nws cov machinability.
(2) Tsis tiav Annealing
Tsis tiav annealing yog ua ntawm qhov kub thiab txias ntawm qhov kub thiab txias Ac1 thiab Ac3. Piv txwv li, nyob rau hauv hypoeutectoid carbon steel, Ac1 kub yog nyob ib ncig ntawm 727 degree, yog li qhov tsis tiav annealing kub feem ntau yog teem rau ntawm 740-770 degree. Txoj kev no refines lub grain qauv, txo hardness thaum tswj ib tug tej theem ntawm lub zog thiab toughness, thiab txhim khu lub internal qauv ntawm cov yeeb nkab steel, nteg lub hauv paus rau kev ua tom ntej.
(3) Spheroidizing Annealing
Spheroidizing annealing feem ntau yog siv rau eutectoid thiab hypereutectoid carbon steels, nrog rau qhov kub ntawm annealing feem ntau teem 20-30℃saum Ac1. Piv txwv li, hauv T10 steel nrog cov ntsiab lus carbon ntawm kwv yees li 1.0%, Ac1 kub yog nyob ib ncig ntawm 730 degree, thiab spheroidizing annealing kub yog tswj ntawm 750-760 degree. Lub hom phiaj ntawm cov txheej txheem no yog spheroidize cementite, txo hardness, txhim kho machinability, thiab npaj cov khoom siv rau kev kho cua sov tom ntej xws li quenching.
2. Lub sij hawm tuav
Tuav lub sij hawm yog hais txog lub sij hawm uas cov yeeb nkab tau khaws cia ntawm qhov kub thiab txias kom ua tiav cov qoob loo loj. Lub sij hawm tuav tshwj xeeb yog nyob ntawm cov khoom muaj pes tsawg leeg, phab ntsa thickness, thiab kev ua haujlwm. Feem ntau, lub sijhawm tuav yog nyob ib ncig ntawm 2-4 teev los xyuas kom meej qhov ua tiav thiab kev hloov pauv ntawm microstructure.
3. Cov txheej txheem txias
(1) Tag Nrho Cov Txias Txias
Tom qab tag nrho annealing, tus nqi txias yuav tsum qeeb. Feem ntau, cov khoom yog txias rau hauv lub qhov cub kom 500-600℃ua ntej cua- txias sab nraum lub cub tawg. Cov txheej txheem txias qeeb no tso cai rau austenite kom tag nrho decompose rau hauv cov qauv ruaj khov ferrite thiab pearlite, tiv thaiv kev ntxhov siab ntau dhau. Thaum lub caij txias no, cov kev ntxhov siab uas seem yog maj mam tso tawm, ua kom cov kav dej zoo zoo.
(2) Tsis tiav Annealing Cooling
Qhov txias txias tom qab annealing tsis tiav kuj tseem qeeb. Rauv cua txias lossis xuab zeb txias yog feem ntau siv, nrog rau qhov txias txias tswj ntawm 30-50℃/ h kom txog thaum qhov kub thiab txias poob mus rau theem qis. Qhov no maj mam txias kom zoo ib yam microstructural transformation thiab txo cov kev ntxhov siab nyob rau hauv, stabilizing lub internal qauv rau kev ua ntxiv.
(3) Spheroidizing Annealing Txias
Qhov txias txias tom qab spheroidizing annealing yuav tsum tau ua tib zoo tswj. Feem ntau, qhov ntsuas kub tau txo qis ntawm tus nqi ntawm 10-20℃/ h kom txog thaum nws nce mus txog 500-600 degree, tom qab ntawd cua txias sab nraum lub cub tawg. Cov txheej txheem tswj cua txias no pab tswj cov txheej txheem spheroidized cementite, kom ntseeg tau tias cov khoom siv zoo heev thiab txhim kho machinability.
4. Lub tshuab cua sov cua tswj
Lub tshuab cua sov ua lub luag haujlwm tseem ceeb hauv cov txheej txheem annealing, cuam tshuam rau qhov zoo ntawm qhov chaw thiab kev ua haujlwm tag nrho ntawm cov kav hlau. Qhov nruab nrab lossis me ntsis oxidizing cua feem ntau yog siv los tiv thaiv decarburization decarburization, uas tuaj yeem ua rau cov khoom tsis zoo. Piv txwv li, nyob rau hauv gas furnace annealing, qhov piv ntawm cov pa roj rau huab cua yuav tsum tau ua tib zoo tswj kom tsis txhob muaj roj ntau ntau, uas tuaj yeem ua rau decarburization. Hloov pauv, qhov chaw oxidizing dhau heev tuaj yeem ua rau oxidation saum npoo thiab tsim cov nplai oxide, yog li kev hloov kho kom zoo rau lub tshuab cua sov yog tsim nyog.
5. Rauv Loading Method
Kev thauj khoom zoo ntawm cov pa roj carbon steel seamless kav hauv qhov cub yog qhov tseem ceeb rau cov cua sov sib xws. Cov kav dej yuav tsum tau npaj kom sib npaug thiab tsis sib npaug ntau dhau kom tsis txhob muaj qhov sib npaug ntawm qhov kub thiab txias, uas tuaj yeem cuam tshuam cov txiaj ntsig annealing. Feem ntau, cov txheej txheem txheej los yog qhov sib cais yog siv, kom ntseeg tau tias txhua cov yeeb nkab yog txaus rhuab thiab txias thoob plaws hauv cov txheej txheem.
Xaus
Kev xaiv qhov tsim nyog annealing tej yam kev mob rau carbon steel seamless kav yog ib qho tseem ceeb rau kev ua kom cov khoom zoo thiab kev ua tau zoo. Tsis muaj xws li qhov kub thiab txias, tuav lub sij hawm, txoj kev txias txias, thiab cua sov cua yuav tsum tau ua tib zoo optimized raws li cov khoom yuav tsum tau ua kom tiav cov khoom uas xav tau thiab tag nrho cov zoo.
