Zvivakwa, Zvakanakira uye Zvishandiso zveDuctile Iron

Ductile iron, inozivikanwawo se spheroidal kana nodular iron, iboka resimbi alloys ine yakasarudzika microstructure inovapa simba repamusoro, kuchinjika, kusimba, uye elasticity. Iine zvinopfuura zvikamu zvitatu kubva muzana kabhoni uye inogona kukotama, kumonyoroka, kana kuremara pasina kutyoka, nekuda kwechimiro chayo chegraphite flake. Ductile iron yakafanana nesimbi mumichina yayo uye yakasimba zvakanyanya kupfuura standard cast iron.

Ductile iron castings inogadzirwa nekudururira simbi yakanyungudutswa mu molds, apo simbi inotonhorera nekuoma kuita maumbirwo anodiwa. Kukandira uku kunoguma nezvinhu zvakasimba zvesimbi zvine kusimba kwakanyanya.

Chii Chinoita Kuti Ductile Iron Yakasiyana?

Ductile iron yakagadzirwa muna 1943 sekuvandudzwa kwemazuva ano pamusoro pechinyakare simbi yakakandwa. Kusiyana nesimbi yakaumbwa, apo graphite inoratidzika semaflakes, ductile iron ine graphite muchimiro chespheroids, saka shoko rokuti "spheroidal graphite." Chimiro ichi chinobvumira ductile iron kuti igone kumira nekukotama uye kuvhunduka pasina kutsemuka, ichipa kusimba kwakanyanya kupfuura yechinyakare simbi yakakandwa, iyo inowanzoitika kune brittleness uye kutyoka.

Ductile iron inogadzirwa zvakanyanya kubva kune yenguruve iron, yakakwirira-yakachena iron ine inopfuura 90% iron content. Nguruve iron inosarudzwa nekuti ine yakaderera yakasara kana inokuvadza zvinhu, inowirirana chemistry, uye inosimudzira yakakwana slag mamiriro panguva yekugadzirwa. Ichi chinyorwa ndicho chikonzero chikuru nei ductile iron foundries ichifarira simbi yenguruve pane mamwe masosi senge simbi yakakandwa.

Zvinhu zveDuctile Iron

Magiredhi akasiyana e ductile iron anogadzirwa nekushandisa matrix chimiro chakatenderedza graphite panguva yekukanda kana kuburikidza nekuwedzera kupisa kurapwa. Aya madiki ekuumbwa akasiyana akagadzirirwa kuti awane chaiwo mamicrostructures, ayo anozotarisa zvimiro zvegiredhi rega rega re ductile iron.

Ductile iron inogona kufungidzirwa sesimbi ine embedded graphite spheroids. Hunhu hwesimbi yesimbi yakatenderedza graphite spheroids inonyanya kupesvedzera zvimiro zve ductile iron, nepo graphite pachayo ichibatsira pakusimba kwayo uye kuchinjika.

Kune akatiwandei emhando dzematrices mu ductile iron, neanotevera ari akanyanya kuwanda:

1. 1. Ferrite-Iyo yakachena iron matrix iyo yakanyanya ductile uye inochinjika, asi ine simba rakaderera. Ferrite ine kushomeka kwekushomeka, asi kukwirira kwayo kupikisa uye nyore kwekugadzira machining kunoita kuti ive chinhu chakakosha mumagiredhi esimbi.
2. 2. Pearlite- Inoumbwa yeferrite uye iron carbide (Fe3C). Iyo yakaoma nepakati ductility, inopa yakakwirira simba, yakanaka kupfeka kuramba, uye zvine mwero kukanganisa kuramba. Pearlite inopawo yakanaka machinability.
3. 3. Pearlite / Ferrite-Chimiro chakavhenganiswa chine ese pearlite uye ferrite, inova ndiyo yakajairika matrix mumagiredhi ekutengesa e ductile iron. Inosanganisa hunhu hwezvose zviri zviviri, ichipa yakaenzana nzira yekusimba, ductility, uye machinability.

Iyo yakasarudzika microstructure yesimbi yega yega inoshandura maitiro ayo emuviri:

Common Ductile Iron Grades

Kunyange paine akawanda akasiyana ductile iron maratidziro, madhiri anogara achipa matatu akajairika mamakisi:

Zvakanakira zveDuctile Iron

Ductile iron inopa akawanda mabhenefiti kune vagadziri uye vagadziri:

• • Inogona kukandwa nyore nyore uye yakagadzirwa, kuderedza mari yekugadzira.
• • Iine simba guru-ku-kurema reshiyo, inobvumira kuti igare yakasimba asi isina kureruka zvikamu.
• • Ductile iron inopa hutano hwakanaka hwekuoma, kudhura, uye kuvimbika.
• • Kukanda kwayo kwepamusoro uye machinability inoita kuti ive yakakodzera kune zvikamu zvakaoma.

Zvishandiso zveDuctile Iron

Nekuda kwesimba rayo uye ductility, ductile iron ine huwandu hwakawanda hwemaindasitiri ekushandisa. Inowanzoshandiswa mupombi, zvikamu zvemotokari, magiya, dzimba dzepombi, uye mabhesi emuchina. Ductile simbi inopokana nekutyoka inoita kuti ive yakanaka kune yekuchengetedza maapplication, senge ma bollards uye kuchengetedzwa kwemhedzisiro. Inoshandiswawo zvakanyanya muindasitiri yesimba remhepo uye dzimwe nzvimbo dzakanyanya-kushushikana uko kusimba uye kuchinjika kwakakosha.