Nzira yekuvandudza sei mechanical properties ye cast grey iron?
Grey cast iron isimbi-carbon alloy umo chikamu chepamusoro chine grey. Kuburikidza nekutonga kwekuumbwa uye kusimba maitiro, iyo kabhoni inonyanya kuoneka muchimiro cheflake graphite. Iyo metallographic chimiro chegrey cast iron inonyanya kuumbwa neflake graphite, simbi matrix uye zviyo muganho eutectic.
Kuvapo kweflake graphite mune grey cast iron inoparadza kuenderera kwesimbi uye kunoita kuti grey cast iron ive brittle material. Asi grey cast iron ndeimwe yekutanga uye yakanyanya kushandiswa simbi zvinhu.Gray cast iron castingsvane zvinhu zvakawanda. Kwenguva yakareba, mukuita kwekugadzira, takapfupikisa mamwe matanho akajairwa ekuvandudza kusimba kwekusimba kwegrey cast iron. Pasi pemamwe mamiriro ezvinhu, isu tinokwanisa zvakare kuvandudza mashandiro ekucheka, kupfeka kuramba uye kubatwa kwekuvhunduka kwegrey cast iron.
Mukugadzirwa chaiko kwekukanda, iyo yakawanda yegrey cast iron ndeye hypoeutectic. Naizvozvo, kuti uvandudze simba rayo rekusimba, zvinotevera zvinofanirwa kuitwa zvakanyanya sezvinobvira:
1) Vimbiso iyo grey cast iron ine yakawanda uye yakawanda yakagadziridzwa yekutanga austenite dendrites panguva yekusimba
2) Deredza huwandu hweeutectic graphite uye ita kuti igove yakaenzana neakanaka A-mhando graphite.
3) Wedzera huwandu hwemasumbu eutectic
4) Munguva yeaustenite eutectoid shanduko, ese anoshanduka kuita yakanaka pearlite matrix
Mukugadzirwa chaiko kwegrey cast iron castings, tinowanzo shandisa matanho anotevera kuti tiwane mhedzisiro iri pamusoro:
1) Sarudza inonzwisisika makemikari kuumbwa
2) Shandura kuumbwa kwemhosva
3) Kupisa simbi yakanyungudutswa
4) Inoculation kurapwa
5) Tsananguro kana yakaderera alloying
6) Kurapa kwekupisa
7) Wedzera mwero wekutonhora panguva yekuchinja eutectoid
Iwo chaiwo matanho anotorwa anoenderana nerudzi rwegrey cast iron castings, iyo inodiwa zvivakwa uye chaiwo mamiriro ekugadzira. Zvisinei, zvinowanzodiwa kutora matanho maviri kana kupfuura kuti uwane kushanda kwaunoda kwesimbi yakakandwa.
Nguva yekutumira: Zvita-28-2020