I loko o ke kaʻina hana paʻa o ka hoʻolei ʻana, ʻekolu mau ʻāpana ma kāna ʻāpana keʻa, ʻo ia ka ʻāpana paʻa, ka ʻāpana paʻa, a me ka ʻāpana wai.
ʻO ka ʻāpana paʻa ka wahi i "paʻa a hui pū ka wai" ma waena o ka ʻāpana wai a me ka ʻāpana paʻa. Kapa ʻia kona laula ʻo ka laula o ka ʻāina paʻa. ʻO ka laulā o ka solidification zone ka hopena nui i ka maikaʻi o ka hoʻolei ʻana. Hoʻokumu ʻia ke ʻano o ka paʻa ʻana o ka hoʻoheheʻe ʻana ma luna o ka laulā o ka wahi paʻa i hōʻike ʻia ma ka ʻāpana keʻa o ka hoʻoheheʻe ʻana, a ua māhele ʻia i loko o ka paʻa paʻa, ka paʻa paʻa, a me ka paʻa waena.
E nānā kākou i nā hiʻohiʻona o nā ʻano paʻa paʻa e like me ka hoʻopaʻa paʻa ʻana a me ka paʻa paʻa.
Layer-by-layer solidification: Ke haiki loa ka laula o ka wahi solidification, pili ia i ke ʻano hoʻopaʻa paʻa. ʻO kona alo paʻa e pili pono ana me ka metala wai. ʻO nā metala e pili ana i ka ʻāpana paʻa paʻa paʻa, ʻo ia nā metala maʻemaʻe (ke keleawe ʻoihana, zinc industrial, tin industrial), eutectic alloys (aluminium-silicon alloys, kokoke-eutectic alloys e like me ka hao hina hina), a me nā alloys me kahi ākea crystallization haiki (e like me hao kalapona haʻahaʻa). , keleawe aluminika, keleawe me ka laulā crystallization liʻiliʻi). ʻO nā pahu metala ma luna aʻe nei no ke ʻano hoʻopaʻa paʻa papa-i-papa.
Ke paʻa ka wai i kahi kūlana paʻa a emi i ka nui, hiki ke hoʻopiha hou ʻia e ka wai, a liʻiliʻi ka manaʻo o ka hoʻopuehu ʻana, akā waiho ʻia nā lua shrinkage concentrated i ka ʻāpana paʻa hope o ka hoʻolei ʻana. He mea maʻalahi ka hoʻopau ʻana i nā lua shrinkage concentrated, no laila ua maikaʻi nā waiwai shrinkage. Hoʻopiha maʻalahi ʻia nā māwae waena ma muli o ka hōʻemi ʻana i ka metala i hoʻoheheʻe ʻia e hoʻōla ai i nā māwae, no laila ʻaʻole liʻiliʻi ka hoʻoheheʻe ʻana i ka māwae wela. ʻOi aku ka maikaʻi o ka hoʻopiha piha ʻana i ka wā e paʻa ai ka hoʻopiha ʻana.
He aha ke ʻano coagulation: Ke ākea loa ka ʻāpana coagulation, aia ia i ke ʻano coagulation paste. ʻO nā metala i loko o ka palena paʻa ākea e pili ana i nā alumini alumini, nā alumini magnesium (aluminium-copper alloys, aluminum-magnesium alloys, magnesium alloys), keleawe keleawe (tin bronze, alumini keleawe, keleawe me ka laulā crystallization temperature range), hao-carbon alloys. (ke kila kalapona kiʻekiʻe , hao ductile).
ʻOi aku ka paʻakikī o ka paʻa ʻana o kahi metala, ʻoi aku ka paʻakikī o nā ʻōhū a me nā hoʻokomo ʻana i loko o ka metala i hoʻoheheʻe ʻia e lana a wehe i ka wā e hoʻolei ʻia ai, a paʻakikī hoʻi ka hānai ʻana. Hiki ke hoolei i ka poha wela. Ke puka mai nā māwae ma waena o nā kristal, ʻaʻole hiki ke hoʻopiha ʻia me ka metala wai e hoʻōla iā lākou. Ke paʻa nei kēia ʻano alloy i ka wā o ka hoʻopiha piha ʻana, ʻilihune hoʻi kona hiki ke hoʻopiha.
He aha ka hoʻopaʻa paʻa waena: ʻO ka hoʻopaʻa ʻana ma waena o ka ʻāpana paʻa paʻa a me ka ʻāpana paʻa ākea i kapa ʻia ʻo ka ʻāpana paʻa waena. ʻO nā huila e pili ana i ka ʻāpana paʻa waena e pili ana i ke kila kalapona, ke kila manganese kiʻekiʻe, kekahi keleawe kūikawā a me ka hao keʻokeʻo. ʻO kāna mau hiʻohiʻona hānai, ke ʻano hoʻoheheʻe wela a me ka hiki ke hoʻopiha piha ʻia ma waena o ka hoʻopaʻa paʻa ʻana o ka papa-e-layer a me nā ʻano paʻa paʻa. ʻO ka mana o ka paʻa ʻana o kēia ʻano o ka hoʻolei ʻana ʻo ia ka mea nui e hoʻoponopono i nā ʻāpana kaʻina hana, e hoʻokumu i kahi gradient wela maikaʻi ma ka ʻāpana keʻa o ka hoʻolei ʻana, e hoʻemi i ka wahi solidification ma ka ʻāpana keʻa hoʻolei, a hoʻololi i ke ʻano solidification mai pasty solidification i papa. -by-layer solidification e kiʻi i nā castings kūpono.
Ka manawa hoʻouna: Mei-17-2024
