Kev xaiv cov khoom pwm yuav tsum ua raws li ob lub hauv paus ntsiab lus
(1) cov pwm muaj raws li cov cai ntawm kev ua haujlwm
1. Thaum lub plhaub lawm tsis zoo rau hauv cov pwm ntawm lub pwm, nws ntws thiab swb raws cov pwm ntawm lub pwm, ua rau kev sib sib zog nqus ntawm qhov pwm thiab qhov seem, uas ua rau tsis ua rau pwm vim hnav. Yog li, ib qho tseem ceeb tshaj plaws thiab cov khoom tseem ceeb ntawm cov khoom hnav - tiv taus pwm.Hardness yog qhov tseem ceeb tshaj plaws uas cuam tshuam hnav rab peev xwm.Yog li, lub siab dua qhov nyuaj ntawm lub qhov pwm, qhov hnyav me me thiab zoo dua qhov hnav tsis kam .Tsis tas li ntawd, hnav lub cev ua haujlwm kuj muaj feem xyuam nrog hom, ntau, hom, qhov loj thiab kev faib tawm ntawm carbide hauv cov khoom.
2. Cov kev ua haujlwm ntawm cov pwm muaj zog thiab cov pwm uas muaj zog yog feem ntau hnyav, thiab qee tus neeg feem ntau muaj kev cuam tshuam loj heev, uas ua rau tawg puas ntsoog.Yuav xav kom tiv thaiv tau qhov pwm ntawm qhov tawg ntawm lub sijhawm ua haujlwm, lub pwm yuav tsum yog siab zog thiab toughness.Qhov toughness ntawm cov pwm mas nyob ntawm cov ntsiab lus ntawm cov ntsiab lus, pwm loj thiab microstructure.
3. Nkees nkig kev ua haujlwm thaum lub sijhawm ua haujlwm ntawm pwm, nyob rau hauv qhov kev txiav txim ntawm kev ntxhov siab cyclic, feem ntau ua rau qaug zog fracture.Nws cov ntaub ntawv muaj xws li rov ua rau qaug zog ntawm me zog, hu rau qaug zog ntawm tensile qaug zog tawg thiab khoov qaug zog nkig qaug zog thiab tawg ntawm cov pwm tuaj yeem nyob ntawm lub zog, lub zog, kev ua kom tawv thiab cov ntsiab lus ntawm cov ntaub ntawv ntawm cov khoom.
4. Kev kub kub thaum lub sijhawm ua haujlwm pwm siab dua, qhov nyuaj thiab lub zog yuav raug txo, ua rau thaum ntxov los yog yas deformation ntawm pwm thiab tsis ua hauj lwm.Yog li ntawd, cov khoom siv pwm yuav tsum muaj siab dua tempering stability cov pwm ntawm kev kub ua haujlwm muaj kev nyuaj siab thiab lub zog.
Qee cov pwm muaj nyob hauv lub xeev uas rov ua kom cua sov thiab cua txias dua thaum ua haujlwm, uas ua rau cov kabmob uas muaj teebmeem thiab kev hloov siab, ua rau qhov tawg ntho thiab txhaws, nce kev quab yuam, tiv thaiv cov yas deformation thiab txo qhov dimensional qhov tseeb, yog li ua rau txoj kev tsis muaj pwm.Koj - kub hnyiab yog ib hom kev ua haujlwm tsis ua haujlwm kub - ua haujlwm tuag.
6. Corrosion ua rau qee lub pwm, xws li cov pwm yas, ua kom zoo thiab ua kom muaj zog corrosive gases xws li HCI thiab HF tom qab kev kho cua sov vim muaj cov tshuaj chlorine, fluorine thiab lwm yam khoom hauv cov hnab yas thaum ua haujlwm, uas yuav ploj pwm qhov , nce qhov chaw npau taws thiab ua rau tsis ua hauj lwm hnav.
(ii) cov pwm ntsib cov txheej txheem kev ua haujlwm
Tuag feem ntau los ntawm forging, txiav ua, kub kev kho thiab lwm yam dab.Yuav kom tau lees tias qhov zoo ntawm puab pwm thiab txo cov nqi ntau lawm, cov ntaub ntawv yuav tsum ntawm forgick zoo, machinability, hardenability, hardenability thiab grindability.Muaj yuav tsum tau me me oxidation, decarburization rhiab heev thiab quenching deformation cracking tendency.
1. Tsawg malleability ntawm kub forging, zoo yas, ntau ntawm forging kub, tsawg tendency ntawm cracking thiab precipitated mesh carbide.
2. Lub tshuab hluav taws xob muaj ntau yam ntawm kev ua kom tsis muaj zog, kev tsis tshua muaj zog thiab kev ua kom tsis muaj zog tsawg, thiab kev siab khov siab.
3. Txiav kev loj loj, txo cov cuab yeej poob thiab tsis tshua muaj kev sib ntxub.
4. Oxidative thiab decarburizing rhiab heev: muaj peev xwm ua kom muaj cov kab mob antioxidant, qeeb decarburizing ceev, tsis hnov qab cua sov, me me ntawm pitting.
5. Kev hnav thiab ua kom siab tawv txaus tom qab hardening.
6. Tshaj quenching txheej tau tuaj yeem tau tom qab hardenability thiab hardenability tau tiav los ntawm kev siv cov npau taws quenching.
7. Qhov ntsuas quenching li qub hloov me ntsis, zoo li cov ntaub ntawv thiab cov distortion yog me ntsis, thiab qhov txawv txav deformation tsis yog tsawg.Conventional quenching tsis rhiab siab kub thiab workpiece puab.
8. Tias me me thiab hnav cov hniav sib tsoo, ntau npaum li kev sib tsoo uas tsis muaj qhov muag, tsis hnov qab zoo thiab txias txias ntawm kev sib tsoo, thiab tsawg dua kev sib tsoo thiab kev sib tsoo.