Ka ọ dị ugbu a China nnukwu dayameta enweghị nkebi ọkpọkọ ọkpọkọ, isi mmepụta usoro na-ekpo ọkụ na-ekpo ọkụ na okpomọkụ mgbasawanye nke nnukwu-dayameta enweghị nkebi ọkpọkọ ọkpọkọ, na-ekpo ọkụ gbasaa enweghị nkebi ígwè pipe nkọwa maka 325mm-1220mm kacha thickest nke 120mm, nwere ike na-enweghị nkebi ígwè ọkpọkọ thermal mgbasawanye. Ndị na-abụghị mba ọkọlọtọ akụkụ, thermal mgbasa enweghị enweghị nkebi bụ ihe anyị na-ekwukarị na thermal mgbasa, njupụta dịtụ ala ma ike contraction akpọrepu ígwè na oblique usoro ma ọ bụ ịbịaru usoro ịgbasa a ụkọ ọkpọkọ dayameta ọkpọkọ finishing Filiks.N'ime oge dị mkpirikpi maka nchara nchara na-emepụta ihe na-abụghị ọkọlọtọ na ụdị pụrụ iche nke ọkpọkọ na-enweghị ntụpọ, na ọnụ ala dị ala, nrụpụta mmepụta dị elu, usoro mmepe nke ubi na-agbagharị ụwa taa.
Nnukwu dayameta enweghị nkebi nchara ọkpọkọ site oyi ịbịaru, oyi-akpọrepu ígwè ngwaahịa, dị ka oyi akpụ akpụ, okpomọkụ ọgwụgwọ na-enweghị ihe ọ bụla kpọmkwem nnyefe nke steeti a na-akpọ oyi-adọta ma ọ bụ oyi akpọrepu ọnọdụ.Tụnyere na-ekpo ọkụ akpọrepu (forging) ala, elu akụkụ ziri ezi oyi-adọta ígwè (akpọrela) steeti, ezi elu àgwà, ala ala roughness, na a elu n'ibu Njirimara, n'ihi oyi adọta (akpọrela) ígwè nnyefe ọnọdụ oxide elu bụ. adịghị ekpuchi, na e nwere a otutu nke nchegbu, ngwangwa corrosion ma ọ bụ nchara, na otú ígwè oyi adọta (akpọrela) ala, ya nkwakọ, nchekwa chọrọ ndị ọzọ stringent, n'ozuzu mkpa ka a na-na ụlọ nkwakọba ihe, na kwesịrị ịṅa ntị. mkpuchi okpomọkụ na iru mmiri.
