Txhua yam khoom siv hauv kev lag luam muaj keeb kwm ntev, tab sis hnub no peb tab tom tham txog keeb kwm kev loj hlob ntawmhlau forgings.
Los ntawm kev ua tsov rog ntiaj teb thib ob mus rau xyoo 1960,hlau forgingsfeem ntau yog lub sijhawm ntawm txoj kev loj hlob ntawm high-strength steel thiab ultra-high-strength steel.Vim tias qhov kev xav tau ntawm kev lag luam aviation thiab kev tsim cov foob pob hluav taws thev naus laus zis, ntau lub zog tshiab steels thiab ultra-high-strength steels tau tshwm sim Cov qib steel, xws li nag lossis daus hardening high-strength stainless hlau thiab ntau yam low-alloy high-strength steels, yog nws cov neeg sawv cev ntawm qib steel.Tom qab xyoo 1960, ntau yam tshiab metallurgical thev naus laus zis, tshwj xeeb tshaj yog cov thev naus laus zis thev naus laus zis, tau siv dav dav.Alloy steel pib tsim nyob rau hauv cov kev taw qhia ntawm siab purity, siab precision thiab ultra-low carbon.Maraging steel thiab ultra-ntshiab ferrite tau tshwm sim dua.New steel qib xws li stainless hlau.