Standard tempering ho txhim kho tag nrho cov khoom ntawm H13 cov khoom, stabilizing nws hardness ntawm 48 ~ 52 HRC thiab nws toughness ntawm 15 ~ 20 J / cm², thaum zoo tso cov residual kev nyuaj siab thiab xyuas kom meej uniform microstructure thiab ruaj khov kev pab cuam.
1.Qhov cuam tshuam zoo rau kev ua haujlwm tseem ceeb
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Qhov taw qhia |
Kev ua tau zoo tom qab Standard Tempering |
Mechanism ntawm Action |
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Hardness |
Nyob ruaj khov ntawm 48 ~ 52 HRC. |
Ob lub voj voog tempering kom txaus martensite tempering, ua rau cov dej ntws tawm ntawm carbide, tsis txhob siab dhau los yog tsis tshua muaj zog. |
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Toughness |
Nce rau 15 ~ 20 J / cm² |
Residual stress yog tso tawm tag nrho, thiab lub microstructure hloov mus rau hauv ib qho tempered martensite, uas ua rau pom qhov cuam tshuam tsis zoo. |
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Hnav Resistance |
Txhim kho qhov tseem ceeb |
Fine, dispersed carbides yog sib npaug sib npaug, txhawb cov matrix thiab qeeb tus nqi hnav. |
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Thermal Fatigue Lub Neej |
Txuas ntxiv los ntawm ntau dua 30% |
High microstructure uniformity ua kom zoo ib yam kev nthuav dav thaum lub sij hawm thermal cycling, ncua kev pom ntawm cov kab nrib pleb (thermal tawg). |
2. Optimization ntawm Microstructure thiab Structure
Tshem Tawm Kev Nyuaj Siab: Sab hauv kev ntxhov siab tuaj yeem ncav cuag 800 MPa tom qab quenching, tab sis txo qis dua los yog sib npaug li 100 MPa tom qab tempering kom zoo, tiv thaiv kev pab cuam - cuam tshuam kev tawg;
Hybridizing Microstructure: zam qhov chaw mos thiab qhov chaw nyuaj; metallographically, nws qhia tau hais tias zoo li tempered martensite + dispersed carbides;
Tiv thaiv kev sib tsoo thib ob: Kev ua kom txias (cua txias) tsis txhob qhia qhov kev ntxhov siab tshiab, txo qhov kev pheej hmoo ntawm microcrack pib.
Metallographic Verification: Kev soj ntsuam raws li 400 × microscope qhia tias tsis muaj carbides network, tsis muaj oxidation ciam teb, thiab lub microstructure huv.
3. Tus nqi hauv kev ua kom muaj kev tsim khoom thiab zoo
High Batch Consistency: Ib leeg ib feem hardness variation Tsawg dua los yog sib npaug rau 2 HRC, tag nrho batch standard deviation Tsawg dua los yog sib npaug rau 0.8 HRC;
Strong Traceability: Ua ke nrog rau qhov cub kub qhov nkhaus kaw thiab kuaj cov ntaub ntawv khaws cia, ua tau raws li tus qauv CQI-9;
Tsawg Rework Rate: Raws li cov txheej txheem txheej txheem, tus nqi rov ua haujlwm yog<2%, significantly reducing production costs.
Cov qauv kev nyab xeeb: "Kev tswj qhov kub thiab txias, qhov tseeb ntawm cov ntawv xeem, thiab cov ntaub ntawv khaws cia" kom ntseeg tau tias tag nrho cov txheej txheem tswj tau thiab rov tsim dua.
