ʻO nā hiʻohiʻona o nā kalai nui (1)

Wahi a nā hana ʻoihana i ka ʻāpana mīkini koʻikoʻi, hiki ke kapa ʻia kahi forging manuahi me ka hoʻohana ʻana i nā kaomi hydraulic me ka mana forging o luna o 1000 tons. Ma muli o ka mana forging o nā kaomi hydraulic no ka forging manuahi, pili like kēia me nā forging shaft ma luna o 5 tons a me nā forging disc ma luna o 2 tons.

ʻO nā hiʻohiʻona nui a me nā kumu nui o nā forgings nui ko lākou nui nui a me ke kaumaha kaumaha. No ka laʻana, ʻo ka nui o ka 600MW turbine generator rotor forging he φ1280mm × 16310mm, ʻo ke kaupaona ʻana he 111.5 tons. ʻO ka nui o ka 2200-2400MW mīkini hoʻoheheʻe mokuahi rotor forging ʻo φ1808mm × 16880mm, ʻo ke kaupaona ʻana he 247 tons.

Ma muli o ko lākou nui nui a me ke kaumaha, pono e hana pololei ʻia nā forgings nui mai nā ingots kila nui. Uaʻike nuiʻia he mau pilikia koʻikoʻi koʻikoʻi nā ingots nui e like me ka hoʻokaʻawale, porosity, shrinkage, non-metallic inclusions, a me nāʻano likeʻole o keʻano likeʻole. Loaʻa iā lākou ka ʻike kinoea ʻoi aku ka kiʻekiʻe, a paʻakikī kēia mau hemahema i ka wā o ka hana forging ma hope. ʻO ka hopena, ʻaʻole like ka like ʻole o ka haku mele ʻana, nā hemahema o ke kino, a me nā kiʻekiʻe kiʻekiʻe o ka ʻike kinoea ʻino i loko o nā forgings nui. Hana kēia i ke kaʻina hana wela no nā forgings nui paʻakikī, hoʻopau manawa, a pipiʻi. No laila, pono e nānā pono i ka wā o ka mālama wela.

Eia kekahi, ma muli o ko lākou nui nui a me ke kaumaha, ʻoi aku ka nui o ka wela o nā forgings nui, ʻo ia ka mea hiki ʻole ke hoʻokō i ka nui o ka wela a me ka hoʻomaha ʻana i ka wā o ka mālama ʻana i ka wela. No laila, no ka hoʻohalahala nui e koi ana i nā hoʻololi koʻikoʻi i ka hale o loko ma o ka hoʻoheheʻe ʻana a i ʻole ke kinai ʻana e hoʻokō i nā koi kiʻekiʻe a me ka maikaʻi, pono e hoʻohana ʻia nā austenite supercooled kiʻekiʻe. ʻO nā laʻana e like me Ni-Cr-Mo, Ni-Mo-V, a me Ni-Cr-Mo-V moʻo kila. Eia naʻe, hiki i nā kila me ke kūpaʻa kiʻekiʻe o ka austenite supercooled i ka hoʻoilina hoʻoilina, ka hopena i ka nui o ka palaoa a me ka like ʻole i nā mea hao hao. No ka hoʻoponoponoʻana i kēia pilikia, koi pinepineʻia nā kaʻina hana wela kūikawā a paʻakikī.

Inā makemake ʻoe i ʻike hou aʻe e pili ana i WELONG forgings no ka turbine mahu a me ka generator, e ʻoluʻolu e leka uila