Kev siv Z-steel zoo
Tom qab smelting, z steel phaj muaj zoo ductility nyob rau hauv lub thickness kev taw qhia, thiab kuj muaj ib tug zoo muaj peev xwm los tiv thaiv lamellar tearing. Nws yog feem ntau haum rau siv nyob rau hauv high-sawv vaj tse thiab loj-span steel lug. Raws li ib txwm muaj, cov cim ntawm z steel phaj yog Z15, 225, Z35, thiab lwm yam. Lub ntsiab lus yog tias seem shrinkage tus nqi raws li thickness kev taw qhia yog ntau dua los yog sib npaug rau 15 feem pua, 25 feem pua, 35 feem pua.
z steel phaj tseem hu ua lamellar tear resistance steel, uas feem ntau yog hu ua Z kev xeem ntawv hlau. Nyob rau hauv lub welded steel qauv, thaum lub thickness ntawm cov hlau phaj yog tsawg tshaj li 40 hli thiab withstands lub nro raws lub thickness ntawm lub phaj, thiaj li tsis txhob lamination tearing thaum vuam, Z-directional steel yog siv. Lub steel phaj yog dov thiab tsim los ntawm steel phaj thiab seem steel. Feem ntau, cov hlau siv nyob rau hauv ntau lub tsev steel qauv yog kub dov, uas tuaj yeem rhuav tshem cov qauv casting ntawm cov khoom siv. Refining cov nplej ntawm steel, ingot nyob rau hauv lub casting, tsim npuas thiab tawg, yuav welded nyob rau hauv high kub thiab siab, thiaj li hais tias cov mechanical zog ntawm steel yuav zoo dua, vim hais tias cov non-metallic inclusions nyob rau hauv cov hlau yog nias rau hauv. Cov nplooj ntawv nyias tom qab dov, tseem nyob hauv cov phaj hlau, thiab cov phaj hlau zoo li stratification tshwm sim, qhov no tsis yog xim hlau sandwich phenomenon, Aggravates lub tensile zog ntawm cov hlau raws thickness kev taw qhia. Yog li ntawd, cov khoom siv ntawm cov hlau phaj nyob rau hauv peb cov lus qhia txawv, thiab qhov kev ua tau zoo yog me ntsis zuj zus raws li dov kev taw qhia perpendicular mus rau dov kev taw qhia; Nyob rau hauv cov kev taw qhia ntawm thickness, qhov kev ua tau zoo yog thib ob, thiab nws cov ntsiab lus sulfur yog tsawg tshaj li ib feem tsib ntawm cov hlau dav dav, thiab seem shrinkage tus nqi yog ntau tshaj 15 feem pua.
