Pwmxaiv cov khoom siv yog ib qho tseem ceeb heev nyob rau hauv tag nrho cov molding txheej txheem.
Kev xaiv cov khoom pwm yuav tsum ua kom tau raws li peb txoj cai.Cov pwm ua tau raws li qhov xav tau ntawm kev ua haujlwm xws li hnav tsis kam thiab toughness, pwm ua tau raws li cov txheej txheem yuav tsum tau ua, thiab pwm yuav tsum ua kom tau raws li kev siv nyiaj txiag.
(1) Covpwmua tau raws li cov kev cai ntawm kev ua haujlwm
1. Hnav tsis kam
Thaum qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoobYog li ntawd, qhov hnav tsis kam ntawm cov khoom siv yog ib qho tseem ceeb tshaj plaws thiab tseem ceeb ntawm cov pwm.
Hardness yog lub ntsiab tseem ceeb cuam tshuam rau hnav tsis kam.Feem ntau, qhov siab dua qhov hardness ntawm pwm qhov chaw, qhov tsawg dua qhov hnav thiab qhov zoo dua qhov hnav tsis kam.Tsis tas li ntawd, hnav tsis kam kuj tseem muaj feem xyuam rau hom, ntau, cov duab, qhov loj thiab kev faib tawm ntawm carbides hauv cov khoom.
2. Muaj zog toughness
Feem ntau ntawm kev ua haujlwm ntawm lubpwmyog qhov phem heev, thiab qee qhov feem ntau dais qhov cuam tshuam loj, uas ua rau tawg tawg.Txhawm rau tiv thaiv kev tawg sai sai ntawm pwm qhov chaw thaum lub sijhawm ua haujlwm, pwm yuav tsum muaj lub zog siab thiab toughness.
Lub toughness ntawm pwm mas nyob ntawm cov ntsiab lus carbon, grain loj thiab lub koom haum lub xeev ntawm cov khoom.
3. Kev qaug zog tawg ua haujlwm
Thaum lub sij hawm ua hauj lwm ntawm cov pwm, qaug zog tawg yog feem ntau tshwm sim nyob rau hauv lub sij hawm ntev kev txiav txim ntawm cyclic kev nyuaj siab.Nws cov ntaub ntawv muaj xws li me-zog ntau yam cuam tshuam qaug zog tawg, tensile qaug zog tawg, hu rau qaug zog tawg thiab khoov qaug zog tawg.
Kev qaug zog tawg ua haujlwm ntawm lubpwmFeem ntau yog nyob ntawm nws lub zog, toughness, hardness, thiab cov ntsiab lus ntawm kev suav nrog hauv cov khoom.
4. Kev ua haujlwm siab kub
Thaum cov pwm ua haujlwm kub siab dua, qhov hardness thiab lub zog yuav txo qis, ua rau cov pwm pwm thaum ntxov los yog cov yas deformation thiab tsis ua haujlwm.Yog li ntawd, cov khoom siv pwm yuav tsum muaj kev ruaj ntseg los tiv thaiv kev kub ntxhov kom ntseeg tau tias cov pwm muaj siab hardness thiab lub zog ntawm kev ua haujlwm kub.
5. Thaum tshav kub kub thiab txias qaug zog tsis kam
Qee cov pwm yog nyob rau hauv ib lub xeev ntawm rov ua cua sov thiab txias thaum lub sij hawm ua hauj lwm, uas ua rau lub nto ntawm cov kab noj hniav yuav raug kev nro, siab thiab kev ntxhov siab, ua rau nto tawg thiab tev, ua rau kev sib txhuam, cuam tshuam cov yas deformation, thiab txo qhov raug qhov. , ua rau Pwm tsis ua haujlwm.Kub thiab txias qaug zog yog ib qho tseem ceeb ntawm kev ua haujlwm kub tsis ua haujlwm, thiab cov tuag no yuav tsum muaj kev tiv thaiv kom txias thiab kub kub.
6. corrosion kuj
Thaum ib copwmxws li cov pwm yas ua haujlwm, vim muaj cov tshuaj chlorine, fluorine thiab lwm yam khoom hauv cov yas, muaj zog corrosive gases xws li HCI thiab HF yog decomposed tom qab cua sov, uas erodes saum npoo ntawm pwm kab noj hniav, tsub kom nws nto roughness, thiab aggravates hnav tsis ua hauj lwm.
(2) Cov pwm ua tau raws li cov txheej txheem kev ua tau zoo
Kev tsim cov pwm feem ntau yuav tsum dhau los ntawm ntau cov txheej txheem xws li forging, txiav, thiab kho cua sov.Txhawm rau ua kom cov pwm tsim tau zoo thiab txo cov nqi tsim khoom, cov khoom yuav tsum muaj forgeability zoo, machinability, hardenability, hardenability thiab grindability;nws kuj yuav tsum muaj me me oxidation, decarburization rhiab heev thiab quenching.Deformation thiab cracking nyiam.
1. Forgeability
Nws muaj tsawg kub forging deformation tsis kam, zoo plasticity, dav forging kub ntau, tsis tshua muaj siab rau forging cracking thiab txias cracking thiab nag lossis daus ntawm network carbides.
2. Annealing tshuab
Lub spheroidizing annealing kub ntau yog dav, lub annealing hardness yog tsawg thiab tus fluctuation ntau yam me me, thiab tus nqi spheroidizing yog siab.
3. Machineability
Cov nyiaj txiav yog loj, cov cuab yeej poob qis, thiab lub tshuab ua qhov roughness tsawg.
4. Oxidation thiab decarburization rhiab heev
Thaum rhuab ntawm qhov kub siab, nws muaj qhov zoo oxidation tsis kam, qeeb decarburization, insensitivity rau cua sov nruab nrab, thiab me me nyiam pitting.
5. Hardenability
Nws muaj ib tug uniform thiab siab hardness tom qab quenching.
6. Hardenability
Tom qab quenching, ib tug sib sib zog nqus hardened txheej yuav tau, uas yuav hardened los ntawm kev siv ib tug me ntsis quenching nruab nrab.
7. Quenching deformation cracking nyiam
Lub ntim hloov ntawm cov pa quenching me me, cov duab yog warped, lub distortion yog me ntsis, thiab qhov txawv txav deformation nyiam yog tsawg.Pa quenching muaj tsawg tawg rhiab heev thiab tsis rhiab rau quenching kub thiab workpiece puab.
8. Grindability
Cov txheeb ze poob ntawm lub sib tsoo log yog me me, qhov txwv kev sib tsoo tus nqi tsis muaj qhov kub hnyiab yog qhov loj, thiab nws tsis rhiab rau qhov zoo ntawm kev sib tsoo lub log thiab cua txias, thiab nws tsis yooj yim rau kev puas tsuaj thiab sib tsoo tawg.
(3) Cov pwm ua tau raws li kev xav tau ntawm kev lag luam
Hauv kev xaiv ntawmpwmcov ntaub ntawv, lub hauv paus ntsiab lus ntawm kev lag luam yuav tsum tau txiav txim siab los txo cov nqi tsim khoom ntau li ntau tau.Yog li ntawd, nyob rau hauv qhov kev txaus siab ntawm kev ua tau zoo, ua ntej xaiv tus nqi qis, yog tias koj tuaj yeem siv cov pa roj carbon steel, koj tsis xav tau cov hlau alloy, thiab yog tias koj tuaj yeem siv cov khoom siv hauv tsev, koj tsis tas yuav cov khoom siv txawv teb chaws.
Tsis tas li ntawd, kev tsim khoom thiab cov khoom siv hauv khw yuav tsum tau txiav txim siab thaum xaiv cov khoom siv.Cov qib steel xaiv yuav tsum yog tsawg thiab muaj zog li sai tau thiab yooj yim rau kev yuav khoom.