Zinthu Zapamwamba Zamkuwa Zamkuwa

Choyamba, ubwino wa zinthu zopangidwa ndi mkuwa wa lead

Mkuwa wa lead uli ndi mphamvu zabwino kwambiri zodzipaka mafuta. Tinthu ta lead timapanga filimu yopaka mafuta panthawi ya kukangana, ndipo coefficient ya kukangana imatha kukhala yotsika kufika pa 0.01-0.05, zomwe zimachepetsa kwambiri kuwonongeka kwa ziwalo zoyenda.

Ponena za mphamvu yonyamula katundu, bronze wa lead amachita bwino. Kupanikizika kovomerezeka kumatha kufika pa 25MPa, zomwe zimakwaniritsa zofunikira zogwiritsidwa ntchito pansi pa katundu wolemera.

Mkuwa wa lead ulinso ndi kukana dzimbiri kwabwino. Uli ndi kukana dzimbiri kwabwino m'madzi a m'nyanja, m'madzi abwino ndi m'zinthu zina kuti ukhale ndi moyo wautali wa ntchito ya chinthucho.

2. Magawo aukadaulo a mkuwa wa lead

Mankhwala omwe amapezeka mu bronze wopangidwa ndi lead ndi awa: mkuwa wa 60-80%, tin wa 5-10%, lead wa 5-25%. Chiŵerengero cholondola cha kapangidwe kameneka chimatsimikizira kukhazikika ndi kusasinthasintha kwa zinthu.

Ponena za makhalidwe enieni, kuchuluka kwa bronze wa lead ndi 8.5-9.0g/cm³, malo osungunuka ndi 850-950℃, ndipo coefficient of thermal expansion ndi 18.0×10⁻⁶/℃. Magawo awa amatsimikizira kukhazikika kwake ndi kudalirika kwake m'malo otentha kwambiri.

Magawo a magwiridwe antchito a makina akuwonetsa kuti mphamvu yokoka ya bronze ya lead ndi yoposa 300MPa ndipo kutalika kwake ndi koposa 10%, zomwe zimatsimikizira chitetezo ndi kulimba kwa zinthuzo panthawi yogwiritsa ntchito.

3. Zitsanzo za kugwiritsa ntchito mkuwa wa lead

Mu ntchito zamakina amigodi, bronze wa lead amagwiritsidwa ntchito kwambiri popanga ma bearing a ball mill, crusher bushing ndi zinthu zina zofunika. Mphamvu zake zabwino kwambiri zopewera kuwonongeka komanso kudzipaka mafuta okha zimathandiza kuti zipangizozi zizigwira ntchito bwino kwa nthawi yayitali.

Mu zida zachitsulo, bronze wa lead amagwiritsidwa ntchito popanga zinthu zofunika monga ma rolling mill bearing ndi ma continuous casting machine bearing. Mphamvu yake yonyamula katundu wambiri komanso magwiridwe antchito oletsa kutopa zimapereka chitsimikizo chodalirika cha magwiridwe antchito otetezeka a zidazo.

Pankhani ya makina omanga, bronze wa lead nthawi zambiri amagwiritsidwa ntchito popanga zinthu zofunika kwambiri monga ma bearing ofukula ndi ma bushing a bulldozer. Kukana kwake kugwedezeka ndi kukana kukalamba kumakwaniritsa zofunikira kwambiri za makina omanga.