Niaj hnub no, cov xaim xaim txias yog cov xaim siv ntau heev, uas yog siv hauv ntau qhov kev lag luam. Nyob rau tib lub sij hawm, txias drawn hlau yog ib hom hlau txias ua hauj lwm. Cov khoom siv raw yog hlau qws, uas yog qhov peb feem ntau hu ua hlau. Cov khoom tsim los ntawm ntau cov txheej txheem xws li shelling. Nws yog peb hom hlau hlau. Ordinary round steel, yog tias nws raug yuam los ntawm lub qhov me dua nws txoj kab uas hla, txoj kab uas hla ntawm cov hlau puag ncig yuav me dua thiab qhov ntev yuav elongated. Rov ua cov txheej txheem no yuav ua rau cov hlau puag ncig me me dua.. Tom qab cov yas deformation no, qhov hardness ntawm cov hlau yuav nce, thiab cov plasticity yuav pib ploj mus.Cold draw wire yog siv ntau dua hauv cov khoom siv hauv tsev, thiab cov qauv ntsuas rau cov xaim txias. kuj txawv. Kuv feem ntau pom cov pawg loj ntawm cov hlau kos rau ntawm qhov chaw tsim kho. Cov khoom tsim nyog siv thaum tsim cov tsev siab siab yog cov xaim txias txias. Ib yam li cov xuab zeb, xuab zeb yog siv rau txhua square meter thiab txhua square meter ntawm phab ntsa. Qhov nruab nrab yog tsau nrog steel tuav thiab pob zeb. Yuav ua li cas muaj ntau yam steel tuav ruaj horizontally thiab vertically nyob rau hauv nruab nrab ntawm phab ntsa? Qhov no qhia txog qhov tseem ceeb ntawm kev taw qhia ntawm cov xaim txias. Lub zog ntawm qhov txias rub hlau yog siab thiab tuaj yeem siv tau ntau txoj hauv kev. Cov leeg pob txha prestressed yog siv ntau tshaj. Cov hlau no tuaj yeem siv tau qhov twg plasticity tsis xav tau, tab sis lub zog tsuas yog xav tau.
Cold drawn wire yog hom hlau txias ua haujlwm. Cov khoom siv yog hlau qws, uas yog qhov peb feem ntau hu ua hlau. Cov khoom tsim los ntawm ntau cov txheej txheem xws li shelling. Nws' yog cov hlau peb pom ntau zaus. Rau cov hlau puag ncig zoo tib yam, yog tias nws raug yuam kom rub los ntawm lub qhov me dua nws txoj kab uas hla, txoj kab uas hla ntawm cov hlau puag ncig yuav me dua thiab qhov ntev yuav elongated. Rov ua cov txheej txheem no yuav ua rau cov hlau puag ncig me dua.. Tom qab cov yas deformation no, lub hardness ntawm cov hlau yuav nce, thiab cov yas yuav tsis pom kiag li. Thaum plasticity tsis tas yuav tsum tau, tab sis lub zog tsuas yog xav tau, cov hlau no tuaj yeem siv tau.
