Structural ígwè workpiece na kpo oku na jụrụ usoro, n'ihi inconsistencies jụrụ ọnụego n'elu oyi akwa na isi ngalaba na oge na-etolite a okpomọkụ dị iche, ọ ga-eduga na olu mgbasawanye na mkpirisi nke na-erughị eru nrụgide na okpomọkụ nrụgide. Na thermal nrụgide n'ihi na a okpomọkụ n'okpuru elu malitere isi ngalaba, nkwekọrịta bụkwa ukwuu karịa ịhapụ etiti isi ngalaba ngalaba nke erughị ala, mgbe ọgwụgwụ nke jụrụ, ebe ọ bụ na etiti akụkụ nke ikpeazụ jụrụ olu contraction enweghị ike. n'efu na-ahapụ akụkụ etiti nke nrụgide nrụgide elu. Nke ahụ bụ n'okpuru mmetụta nke thermal nchegbu n'ikpeazụ na workpiece elu mgbali na obi Ministry obi erughị ala. Ihe a na-eme ka ọ dị jụụ ngwa ngwa, ihe mejupụtara ihe na ọgwụgwọ okpomọkụ na ihe ndị ọzọ. Mgbe ọ dị mma, ngwa ngwa, na-abawanye ọdịnaya carbon na ihe ngwakọta alloy, usoro nju oyi na-enweghị isi nke nrụrụ plastik n'okpuru nrụgide okpomọkụ nke na-ebuwanye ibu, ụdị ikpeazụ nke nrụgide fọdụrụnụ ọ na-enweta.

N'aka nke ọzọ ígwè n'oge okpomọkụ ọgwụgwọ n'ihi mgbanwe nke anụ ahụ ie austenite ka martensite, na-esonyere na-abawanye nke kpọmkwem olu nke mgbasawanye nke workpiece, akụkụ dị iche iche nke workpiece nwere mgbanwe na-adọ, na-akpata enweghị nkwekọrịta. nke olu anụ ahụ toro nrụgide. Nsonaazụ ikpeazụ bụ nrụgide nhụsianya nke anụ ahụ dị n'elu, nrụgide nrụgide nke akụkụ obi, na nrụgide okpomọkụ n'ụzọ dị iche. The nchegbu na workpiece size na jụrụ ọnụego martensite mgbanwe mpaghara ihe, udi, chemical mejupụtara nke ihe onwunwe.