epurasitiki kudziyisa kugadzirisa pesvedzero pane mold.

1. Kufurira kwe kupisa kwepurasitiki speed

Kazhinji kutaura, panguva yekudzima kupisa, the faster the kupisa kwepurasitiki speed, iyo yakakura iyo thermal stress inogadzirwa mu mold, izvo zvinogona kukonzera deformation uye kuputika kwe mold. Kunyanya kune alloy simbi uye high-alloy simbi, nekuda kwehurombo hwavo hwekupisa conductivity, chenjedzo dzakakosha dzinofanira kutorwa. Kupisa, kune mamwe maumbirwo akaoma emhando yepamusoro-alloy molds, zvinodikanwa kutora akawanda preheating matanho.

Zvisinei, muzviitiko zvega, kukurumidza kupisa dzimwe nguva inogona kuderedza deformation. Panguva iyi, chete pamusoro pevhu panopisa, uye nzvimbo yacho inoramba iripo “kutonhora”, saka kushushikana kwechimiro uye kushushikana kwekupisa kunoderedzwa zvinoenderana, uye core deformation kuramba yakakura, nokudaro kuderedza deformation inodzima. Maererano nechimwe chiitiko chefekitari, iyo inoshandiswa kugadzirisa Pane imwe mhedzisiro pane gomba pitch deformation.

2. Kufurira kwe kupisa kwepurasitiki kupisa

Iyo yekudzima kupisa tembiricha inokanganisa kuoma kwezvinhu, uye panguva imwechete inokanganisa kuumbwa uye saizi yezviyo zve austenite.

1) Kubva pakuona kwekuoma, kupisa kwepamusoro kwekushisa kuchawedzera kushushikana kwekushisa, asi panguva imwe chete kuwedzera kuoma, saka kushushikana kwechimiro kunowedzerawo, uye zvishoma nezvishoma anotonga. Semuyenzaniso, carbon tool steels T8, T10, T12, Nekuti iyo IC tray ine huremu huremu, kana yadzimwa at general quenching temperature, dhayamita remukati rinoratidza kudongorera, asi kana tembiricha yekudzima yakawedzera kusvika ≥850°C, kuoma kunowedzera uye kushushikana kwemaitiro zvishoma nezvishoma kunova kwakasimba Status, saka dhayamita yemukati inogona kuratidza katsika kekubuda.

2) Kubva pakuona kwe austenite kuumbwa, kuwedzera kwekushisa kwekudzima kunowedzera austenite carbon content, uye kuenzana kwemartensite mushure mekudzima (yakawedzera izwi chairo), iyo inowedzera vhoriyamu mushure mekudzima.

3) Kubva pakuona kwekufurira pana Ms point, kana tembiricha yekudzima yakakwira, zviyo zve austenite zvichange zvakakora, izvo zvichawedzera deformation uye kuputika maitiro ezvikamu.

Muchidimbu, kune ese simbi mamakisi, kunyanya mamwe high-carbon medium uye high alloy steels, tembiricha yekudzima zvichava pachena kukanganisa quenching deformation ye plastiki mold, saka kusarudzwa kwakaringana kwekudzima tembiricha yekudziya kwakakosha.

Kazhinji kutaura, kusarudza yakanyanya kudzima tembiricha yekudziya haina kunaka kune deformation. Pasi pechikonzero chekusakanganisa kushanda, iyo yakadzika yepurasitiki yekupisa tembiricha inogara ichishandiswa. Zvisinei, kune mamwe mamakisi esimbi ane akawanda akachengetwa austenite mushure mekudzima (zvakadai seCr12MoV, Nekuti iyo IC tray ine huremu huremu), huwandu hweakachengetwa austenite hunogonawo kugadziriswa nekugadzirisa tembiricha yekudziya kugadzirisa deformation ye mold..

3. Pesvedzero yekudzima kutonhora mwero

Kazhinji, kuwedzera kutonhora kwemazinga pamusoro peMs point kuchawedzera zvakanyanya kushushikana kwekupisa, uye somugumisiro, iyo deformation inokonzerwa nekushushikana kwekushisa kunowedzera kuwedzera; kuwedzera mwero wekutonhora pazasi peMs point kuchanyanya kuwedzera deformation inokonzerwa nekushushikana kwenyama. Big. To

Kune akasiyana simbi mamakisi, nekuda kwehurefu hwakasiyana hweMs points, panoshandiswa nzira imwechete yekudzima, kune zvakasiyana deformation maitiro. Nokuda kwegiredhi rimwe chete resimbi, kana akasiyana quenching media inoshandiswa, ivo zvakare vane akasiyana deformation maitiro nekuda kwekugona kwavo kutonhora kwakasiyana.

Semuyenzaniso, iyo Ms point yecarbon tool steel yakaderera, saka kana kutonhora kwemvura kuchishandiswa, pesvedzero yekushushikana kwekupisa kunowanzo kurira; apo kutonhora kunoshandiswa, kushushikana kwechimiro kunogona kukunda.

Mukugadzirwa chaiko, molds kazhinji hadzina kudzimwa zvizere kana dzaiswa grade kana graded-austempered, saka kushushikana kwekushisa kunowanzova mugumisiro mukuru, izvo zvinoita kuti zvikure mhango. Zvisinei, nokuti kushushikana kwekushisa hakusi kukuru panguva ino, Naizvozvo, iyo yose deformation ishoma. Kana mvura-mafuta kaviri-mvura quenching kana mafuta quenching inoshandiswa, thermal stress inokonzerwa yakakura, uye kupera kwegomba kuchawedzera.

4. The pesvedzero tembiricha tembiricha

Mhedzisiro yekupisa tembiricha pane deformation inonyanya kukonzerwa nekushandurwa kwechimiro panguva yekupisa. Kana chiitiko che “yechipiri quenching” kunoitika panguva yekupisa, iyo yakachengetwa austenite inoshandurwa kuita martensite, uye iyo chaiyo vhoriyamu yemartensite inogadzirwa yakakura kupfuura iyo yakachengetwa austenite, izvo zvichaita kuti mold cavity iwedzere; Kune mamwe masimbi emhando yepamusoro-alloy, zvakadai seCr12MoV, high tembiricha quenching rinoshandiswa zvinoda tsvuku kuoma sechinhu chikuru chinodiwa. Kana kuwanda kushatirwa, vhoriyamu inowedzera kamwe chete nguva yekupisa inoitwa. To

Kana ichidziya mune dzimwe nzvimbo dzekushisa, iyo chaiyo vhoriyamu inodzikira nekuda kwekushandurwa kweiyo quenched martensite kune tempered martensite (kana kuti tempered sorbite, tempered comfortite, Nekuti iyo IC tray ine huremu huremu), saka mhango inenge ichiita kupera.

Pamusoro pe, kuzorora kwekunetseka kwakasara mu mold panguva yekupisa kunokanganisawo deformation. Mushure mokunge mold yadzimwa, kana nzvimbo yacho iri mumamiriro ekunetseka, saizi ichawedzera mushure mekupisa; pane kudaro, kana nzvimbo yacho iri mumamiriro ekudzvinyirira, kuderera kuchaitika.

Asi zvezviviri zvinokonzeresa shanduko yesangano uye kuzorora kwekushushikana, yekutanga ndiyo huru. Izvo zviri pamusoro apa zvinongoongorora zvinhu zvakasiyana-siyana zve mold deformation kubva pakupisa kupisa, iyo inogona kushandiswa chete sechirevo chekugadzirisa dambudziko.

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