Lub luag haujlwm ntawm kev kho cua sov hauv Saw Tip Vuam

    Vuam tungsten carbide (WC) pom cov lus qhia rau kev txiav cov cuab yeej yog cov txheej txheem tseem ceeb uas cuam tshuam rau kev ua tau zoo thiab kev ua haujlwm ntev ntawm cov cuab yeej. Txawm li cas los xij, cov txheej txheem vuam tuaj yeem qhia cov kev ntxhov siab seem thiab hloov cov microstructure ntawm cov ntaub ntawv koom nrog. Qhov no yog qhov kev kho cua sov ua lub luag haujlwm tseem ceeb. Los ntawm kev ua tib zoo siv cov txheej txheem kev kho cua sov tom qab vuam, cov neeg tsim khoom tuaj yeem txhim kho cov khoom siv ntawm cov pob qij txha welded, kom ntseeg tau tias kev ua haujlwm zoo nyob rau hauv kev ua haujlwm. Kab lus no tshawb txog qhov tseem ceeb ntawm kev kho cua sov hauv cov saw hlau vuam, cov txheej txheem cuam tshuam, thiab cov txiaj ntsig nws muab.

1. Nkag siab txog kev kho cua sov

    Kev kho cua sov yog cov txheej txheem tswj nrog cov cua sov thiab cua txias ntawm cov ntaub ntawv kom ua tiav cov khoom xav tau. Nyob rau hauv cov ntsiab lus ntawm welding, kev kho cua sov ua hauj lwm pab daws cov residual stresses, txhim kho hardness, thiab txhim kho toughness. Cov txheej txheem kev kho cua sov tshwj xeeb xaiv nyob ntawm cov khoom siv thiab cov yam ntxwv xav tau ntawm cov khoom kawg.

2. Qhov tseem ceeb ntawm kev kho cua sov hauv vuam

2.1 Residual Stress Relief

    Vuam qhia txog cov thermal gradients tseem ceeb uas tuaj yeem ua rau muaj kev ntxhov siab nyob hauv qhov sib koom ua ke thiab qhov chaw kub ntxhov (HAZ). Cov kev ntxhov siab no tuaj yeem ua rau warping, tawg, lossis ua tsis tiav ntxov ntawm cov khoom siv welded thaum ua haujlwm. Kev kho cua sov yog qhov tseem ceeb rau kev tshem tawm cov kev ntxhov siab no, txhawb kev ruaj ntseg ntawm qhov ntev, thiab ua kom muaj kev ncaj ncees ntawm kev sib koom ua ke.

2.2 Microstructure Optimization

    Cov txheej txheem vuam tuaj yeem hloov kho qhov microstructure ntawm ob lub tswv yim tungsten carbide thiab cov hlau substrate. Cov cua kub ntau dhau tuaj yeem ua rau carbide coarsening, uas cuam tshuam qhov hardness thiab hnav tsis kam ntawm cov lus qhia. Kev kho cua sov tso cai rau kev ua kom zoo ntawm microstructure, txhawb kev faib tawm ntau dua ntawm carbides thiab txhim kho tag nrho cov kev ua tau zoo ntawm cov lus qhia pom.

2.3 Txhim kho cov cuab yeej cuab tam

    Los ntawm kev kho cua sov, cov tuam txhab tsim khoom tuaj yeem kho cov khoom siv ntawm cov welded sib koom ua kom tau raws li cov ntawv thov tshwj xeeb. Cov txheej txheem xws li tempering thiab annealing tuaj yeem txhim kho toughness thaum tuav hardness. Qhov kev sib npaug no yog qhov tseem ceeb rau kev ua kom ntseeg tau tias cov lus qhia pom tuaj yeem tiv taus qhov kev ntxhov siab siab thiab abrasive tej yam kev mob tshwm sim thaum lub sijhawm ua haujlwm.

3. Cov txheej txheem kho cua sov

3.1 Kev ntxhov siab

    Kev daws kev ntxhov siab yog txheej txheem kev kho cua sov uas muaj cov cua sov ntawm cov khoom siv welded mus rau qhov kub thiab txias, feem ntau qis dua qhov kub ntawm cov khoom siv hauv paus, thiab tom qab ntawd cia nws txias maj mam. Cov txheej txheem no yuav pab txo qis cov kev ntxhov siab uas tsis muaj kev hloov pauv ntawm microstructure ntawm tungsten carbide lossis steel substrate.

3.2 Tempering

    Tempering feem ntau ua tom qab quenching kom txo brittleness. Hauv cov ntsiab lus ntawm tungsten carbide pom cov lus qhia, tempering tuaj yeem pab ua kom muaj qhov sib npaug ntawm hardness thiab toughness. Cov tivthaiv yog rhuab mus rau ib tug predetermined kub thiab ces txias, tso cai rau lub redistribution ntawm carbon thiab txo cov kev ntxhov siab nyob rau hauv.

3.3 Kev sib tw

    Annealing yog txheej txheem kev kho cua sov ntau dua uas tuaj yeem siv rau cov hlau substrate. Nws suav nrog cua sov cov khoom mus rau qhov kub thiab txias thiab maj mam txias nws los txhawb recrystallization. Cov txheej txheem no txhim kho ductility thiab txo hardness, ua rau nws yooj yim dua rau tshuab los yog ntxiv cov txheej txheem welded sib koom.

4. Kev txiav txim siab rau kev kho cua sov kom zoo

4.1 Kev tswj qhov kub thiab txias

    Kev tswj qhov kub thiab txias yog qhov tseem ceeb thaum kho cua sov. Overheating tuaj yeem ua rau cov kev hloov pauv tsis zoo hauv microstructure, thaum cua sov tsis txaus yuav tsis txaus los txo kev ntxhov siab. Kev siv cov tshuab ntsuas kub siab tshaj plaws tuaj yeem pab xyuas kom meej tias cov txheej txheem kho cua sov ua tiav nyob rau hauv cov txheej txheem teev tseg.

4.2 Txias tus nqi

    Tus nqi txias tom qab kev kho cua sov kuj tseem ua lub luag haujlwm tseem ceeb hauv kev txiav txim siab qhov kawg ntawm cov khoom sib koom ua ke. Kev ua kom txias nrawm tuaj yeem ua rau muaj kev ntxhov siab ntxiv, thaum txias qeeb txhawb kev sib xws hauv microstructure. Cov neeg tsim khoom yuav tsum ua tib zoo xaiv cov txheej txheem txias raws li cov khoom siv thiab cov txiaj ntsig xav tau.

4.3 Quality Assurance

    Kev ua raws li kev ntsuas kev ruaj ntseg zoo yog qhov tseem ceeb los xyuas qhov ua tau zoo ntawm cov txheej txheem kho cua sov. Kev kuaj tsis muaj kev puas tsuaj (NDT) cov txheej txheem, xws li kev sim hardness thiab microstructural tsom xam, tuaj yeem pab ntsuam xyuas qhov zoo ntawm cov vuam thiab qhov ua tau zoo ntawm kev kho cua sov.

Xaus

    Kev kho cua sov yog ib kauj ruam tseem ceeb hauv kev vuam ntawm tungsten carbide pom cov lus qhia, ua haujlwm kom txo qis kev ntxhov siab, txhim kho microstructure, thiab txhim kho cov khoom siv kho tshuab. Los ntawm kev siv cov txheej txheem kho cua sov kom tsim nyog, cov tuam ntxhab tuaj yeem txhim kho kev ua tau zoo thiab ua haujlwm ntev ntawm lawv cov cuab yeej txiav. Raws li kev lag luam hardmetal txuas ntxiv mus, kev sib koom ua ke ntawm cov txheej txheem kho cua sov yuav tseem yog qhov tseem ceeb rau kev tsim cov khoom lag luam zoo tungsten carbide uas ua tau raws li qhov xav tau ntawm cov ntawv thov niaj hnub no..