Muzvigadzirwa zvemaindasitiri, giya resimbi rinoshandiswa zvakanyanya mumagetsi ekufambisa masisitimu emhando dzakasiyana dzemichina nekuda kwesimba rayo rakakura, kupfeka kuramba uye kuneta kuramba. Hunhu hwayo hunobata zvakananga hutano uye hupenyu hwemidziyo. Naizvozvo, kutonga kwemhando yegiya simbi kwakakosha. Pakusarudza, kusimba kwayo, kusimba uye kupfeka kuramba kunofanirwa kutariswa. Tisati tagadzirisa simbi yegiya, isu tinofanirwa kuongorora iyo metallographic chimiro, kuomarara, kuumbwa kwemakemikari, nezvimwe zvezvinhu. Iyo metallographic chimiro uye kuoma kwegiya simbi zviratidzo zvakakosha zvekuongorora zvimiro zvayo zvemuchina, kupisa kurapwa uye hupenyu hwesevhisi. Iyo metallographic ongororo uye kuoma bvunzo yegiya simbi inofanirwa kunyatso kutevedzera yakajairwa maitiro, uye kugadzira chirongwa chekuyedza chinoenderana nehunhu hwezvinhu uye mamiriro ekushanda:
Kutanga, metallographic analysis. Iyo metallographic chimiro chegiya simbi ine simba rakakura pakuita kwayo, sekudzika kweiyo carburized layer, saizi yezviyo, kugovera carbide, etc. Izvo zvinodikanwa kuti uone matanho ekuongorora, akadai sampling, kugadzirira sampuli, corrosion, uye wozocherechedza chimiro. Zvinogona zvakare kuve zvakafanira kutaura zvakajairwa matishu mhando, senge martensite, bainite, pearlite, uye maitiro ekuongorora kana aya matishu achisangana nezviyero.
Ipapo kunouya bvunzo yekuoma. Kuoma kwesimbi yegiya kwakanangana nekupfeka kuramba uye simba. Dzakajairwa kuomarara nzira dzekuyedza dzinosanganisira Rockwell kuomarara, kuomarara kweBrinell, kuomarara kweVickers, uye pamwe kuomarara kweRockwell kune akaiswa carburized layers. Izvo zvinodikanwa kutsanangura mamiriro anoshanda emhando dzakasiyana dzekuedza, seVickers kana pamusoro Rockwell yecarburized layers, uye Brinell kana Rockwell yekuomarara kwese. Panguva imwecheteyo, zviyero zvekuedza, seASTM kana GB, uye matanho panguva yekuyedzwa, senge kusarudzwa kwenzvimbo dzekuyedza, kurapwa kwepamusoro, nezvimwe, zvinofanirwa kutaurwa.
Tisati taongorora, tinofanira kutanga tacheka uye kuenzanisa simbi yegiya. Pazasi isu tinoshandisa iyo chaiyo metallographic sampuli yekucheka muchina semuenzaniso wekuratidza sampuli yekucheka maitiro.
1. Bvisa workpiece uye uisungirire nechimbichimbi chinokurumidza.
2. Mushure mekugadzirisa workpiece, pfeka chivharo chekudzivirira.
3. Isa zvigadziro zvekucheka pahwindo uye tanga purogiramu yekucheka
4. Vhura chivharo chepamusoro uye tora sampuli yakachekwa kuti upedze muenzaniso wekucheka maitiro.
Iwo akachekwa masampuli anogona kushandiswa kune inotevera sampu yekugadzirira maitiro senge kukwira, kukuya, uye kupukuta, mushure meiyo giya kuomarara bvunzo kana metallographic ongororo inogona kuitwa.
Nguva yekutumira: Kubvumbi-02-2025
