N'oge usoro siri ike nke nkedo, a na-enwekarị mpaghara atọ na mpaghara obe ya, ya bụ ebe siri ike, ebe siri ike, na mpaghara mmiri mmiri.
Mpaghara siri ike bụ ebe "ihe siri ike na mmiri mmiri na-ebikọ ọnụ" n'etiti mpaghara mmiri mmiri na mpaghara siri ike. A na-akpọ obosara ya obosara mpaghara solidification. Obosara nke mpaghara siri ike nwere mmetụta dị ukwuu n'ịdị mma nke nkedo. Usoro nkedo siri ike nke nkedo na-adabere na obosara nke mpaghara siri ike nke a na-egosi na mpaghara obe nke nkedo ahụ, a na-ekewakwa ya n'ime oyi akwa oyi akwa, mado siri ike, na nkwụsi ike nke etiti.
Ka anyị leba anya na njirimara nke ụzọ isi ike dị ka oyi akwa oyi akwa na mado siri ike.
Layer-by-layer solidification: Mgbe obosara nke mpaghara ebe siri ike dị warara nke ukwuu, ọ bụ nke usoro nhazi oyi akwa-site-layer. Ya solidification n'ihu bụ kpọmkwem kọntaktị na mmiri mmiri metal. Ọla ndị dị na mpaghara siri ike dị warara gụnyere ọla dị ọcha (ọla kọpa ụlọ ọrụ, zinc ụlọ ọrụ, tin ụlọ ọrụ), eutectic alloys (aluminom-silicon alloys, nso eutectic alloys dị ka nkedo isi awọ), na alloys nwere oke kristal dị warara (dịka. obere carbon ígwè). , Aluminom ọla kọpa, ọla na obere crystallization nso). Ihe ọla ndị a dị n'elu bụ nke usoro siri ike nke oyi akwa-site-layer.
Mgbe mmiri mmiri ahụ na-agbake n'ime ọnọdụ siri ike ma na-adaba na olu, ọ nwere ike na-ejupụta ya mgbe niile site na mmiri mmiri ahụ, na ọchịchọ nke ịmepụta shrinkage gbasasịrị dị ntakịrị, ma a na-ahapụ oghere nkwụsịtụ na njedebe ikpeazụ siri ike nke nkedo. Oghere mkpọda gbadoro ụkwụ na-adị mfe ikpochapụ, ya mere ihe eji eme ihe dị mma. A na-eji ígwè a wụrụ awụ na-eju ihe mgbawa intergranular nke ihe mgbochi mgbochi kpatara na-adị mfe iji gwọọ mgbawa ahụ, ya mere ihe nkedo adịghị enwekarị mmasị ịgbawa ọkụ. Ọ nwekwara ikike njuputa ka mma mgbe siri ike na-eme n'oge usoro njuputa.
Kedu ihe bụ coagulation tapawa: Mgbe mpaghara coagulation dị obosara nke ukwuu, ọ bụ nke usoro nchikota nke mado. Ọla ndị dị na mpaghara ahụ siri ike gụnyere aluminum alloys, magnesium alloys (aluminom-copper alloys, aluminum-magnesium alloys, magnesium alloys), ọla kọpa alloys (tin bronze, aluminum bronze, brass with a wide crystallization temperature range), ígwè-carbon alloys. (elu carbon ígwè, ductile ígwè).
Ka obosara mpaghara nke siri ike nke metal, ka ọ na-esikwu ike maka egosipụta na ntinye na ọla a wụrụ awụ ka ọ na-ese n'elu ma wepụ ya n'oge nkedo, ọ na-esikwa ike inye nri. Ihe nkedo na-adịkarị mfe mgbawa ọkụ. Mgbe mgbawa na-ada n'etiti kristal, ha enweghị ike ijupụta na igwe mmiri iji gwọọ ha. Mgbe ụdị alloy a na-eme ka ọ sie ike n'oge usoro ndochi, ikike njuputa ya adịghịkwa mma.
Gịnị bụ etiti siri ike: A na-akpọ ebe siri ike dị n'etiti mpaghara siri ike dị warara na mpaghara obosara siri ike. Alloys nke dị na etiti solidification mpaghara gụnyere carbon ígwè, elu manganese ígwè, ụfọdụ pụrụ iche ọla na ọcha nkedo ígwè. Njirimara nri ya, àgwà mgbawa ọkụ na ike imeju ebu bụ n'etiti oyi akwa-site-layer solidification na mado ụzọ siri ike. Njikwa nke siri ike nke ụdị nkedo a bụ tumadi iji dozie usoro usoro, guzobe gradient okpomọkụ dị mma na mpaghara obe nke nkedo, belata ebe siri ike na nkedo nkedo, ma gbanwee ọnọdụ siri ike site na pasty solidification na oyi akwa. -site-layer solidification iji nweta nkedo tozuru oke.
Oge nzipu: Mee-17-2024
