Munguva yekusimbisa maitiro ekukanda, pane kazhinji nzvimbo nhatu pachikamu chayo chemuchinjikwa, dzinoti nzvimbo yakasimba, nzvimbo yekusimbisa, uye nzvimbo yemvura.
Iyo solidification zone inzvimbo iyo "yakasimba uye yemvura inogarisana" pakati penzvimbo yemvura nenzvimbo yakasimba. Kufara kwaro kunonzi hupamhi hwezone yekusimbisa. Upamhi hwenzvimbo yekusimbisa ine simba guru pamhando yekukanda. Iyo nzira yekusimbisa yekukanda yakavakirwa pahupamhi hwenzvimbo yekusimbisa inounzwa pamuchinjikwa chikamu chekukanda, uye yakakamurwa kuita layer-by-layer solidification, paste solidification, uye yepakati kusimba.
Ngatitarisei maitiro enzira dzekusimba senge layer-by-layer solidification uye paste solidification.
Layer-by-layer solidification: Kana hupamhi hwenzvimbo yekusimbisa hwakanyanya kutetepa, ndeyeiyo layer-by-layer solidification nzira. Yayo yekusimbisa kumberi inosangana yakananga neyemvura simbi. Simbi dzenzvimbo yakatetepa yekusimbisa zvinosanganisira simbi dzakachena (mhangura yeindasitiri, zingi yeindasitiri, tani yemaindasitiri), eutectic alloys (aluminium-silicon alloys, pedyo-eutectic alloys senge grey cast iron), uye alloys ane nhete crystallization renji (senge. pasi kabhoni simbi). , aluminium bronze, ndarira ine diki crystallization range). Iwo ari pamusoro pesimbi makesi ese ndeeiyo layer-by-layer solidification nzira.
Kana iyo mvura yaoma ikava yakasimba uye ichidzika muhukuru, inogona kuramba ichizadzikiswa nemvura, uye katsika kekubudisa yakapararira shrinkage idiki, asi maburi ekudzika akaiswa anosara muchikamu chekupedzisira chakasimba chekukanda. Concentrated shrinkage cavities zviri nyore kubvisa, saka shrinkage properties yakanaka. Intergranular cracks inokonzerwa nekudzivirirwa shrinkage inozadzwa nyore nyore nesimbi yakanyungudutswa kuporesa kuputika, saka makanda ane maitiro mashoma ekupisa kupisa. Iyo ine zvakare iri nani yekuzadza kugona kana kuomeswa kunoitika panguva yekuzadza.
Chii chinonzi paste coagulation: Kana iyo coagulation zone yakakura kwazvo, ndeye nzira yekuisa coagulation. Masimbi enzvimbo yakafara yekusimba anosanganisira aluminium alloys, magnesium alloys (aluminium-copper alloys, aluminium-magnesium alloys, magnesium alloys), copper alloys (tin bronze, aluminium bronze, ndarira ine yakafara crystallization tembiricha), iron-carbon alloys. (yakakwirira kabhoni simbi, ductile iron).
Iyo yakakura nzvimbo yekusimbisa yesimbi, iyo yakanyanya kuoma kuti mabhubhu uye inclusions musimbi yakanyungudutswa iyangamire uye ichibvisa panguva yekukanda, uye zvakare yakaoma kudya. Castings inowanzopisa kuputika. Kana pakatsemuka pakati pemakristasi, haagone kuzadzwa nesimbi yemvura kuti avaporese. Kana iyi mhando yealloy ichisimba panguva yekuzadza, kugona kwayo kuzadza zvakare kwakashata.
Chii chinonzi kusimba kwepakati: Iko kusimba pakati penzvimbo yakatetepa yekusimbisa uye yakakura solidification zone inonzi iyo yepakati solidification zone. Alloys enzvimbo yepakati solidification zone anosanganisira kabhoni simbi, yakakwira manganese simbi, imwe yakakosha ndarira uye chena yakakanda simbi. Hunhu hwayo hwekudyisa, hutsi hwekupwanya hutsika uye kugona kuzadza mold zviri pakati pe layer-by-layer solidification uye paste solidification nzira. Kudzora kwekusimba kwerudzi urwu rwekukanda kunonyanya kugadzirisa maparamendi, kumisikidza yakanaka tembiricha gradient pamuchinjikwa chikamu chekukanda, kuderedza nzvimbo yekusimbisa pachikamu chekukanda, uye shandura iyo solidification mode kubva pasty solidification kuenda kune layer. -by-layer solidification kuti uwane vanokwanisa castings.
Nguva yekutumira: May-17-2024
