Thaum txiav txim siab ntawm cov khoom siv ntawmmuaj zog screws, cov kev xav tseem ceeb yog qhov kev thov ib puag ncig thiab kev xav tau ntawm kev ua haujlwm. Cov khoom siv feem ntau muaj xws li carbon steel, tshwj xeeb alloy steel, stainless hlau, thiab titanium hlau. Kev xaiv ntawm txhua yam khoom siv lub hom phiaj kom ua tiav qhov zoo sib npaug ntawm lub zog, toughness, hnav thiab corrosion kuj, thiab nqi-zoo.
Cov pa roj carbon steel: Raws li cov khoom siv dav siv cov khoom siv muaj zog, cov pa roj carbon steel paub txog nws qhov kev ua tau zoo tshaj plaws, tshwj xeeb tshaj yog tsim rau cov ntawv thov uas yuav tsum muaj lub zog tsis tshaj qib kaum. Txawm hais tias nws zoo heev lub zog thiab hardness, nws qis toughness txhais tau tias nws yuav tawg thaum muaj kev cuam tshuam loj heev.
Kev ua haujlwm siab alloy steel: Hom hlau no, nrog rau kev hnav zoo heev thiab qib siab tensile lub zog, ua haujlwm ruaj khov hauv qhov kub thiab txias thiab yog qhov kev xaiv zoo tshaj plaws rau kev ua haujlwm siab tshaj qib kaum. Txawm li cas los xij, kev ua haujlwm siab tuaj nrog cov nqi siab.
Corrosion resistant stainless hlau: Hauv marine engineering, khoom siv kho mob, thiab kev lag luam khoom noj khoom haus, muaj zogstainless hlau screwsmuaj kev tiv thaiv corrosion zoo heev, uas tuaj yeem tiv thaiv xeb thiab tswj tau lub sijhawm ntev. Tsis tas li ntawd, nws zoo formability thiab antioxidant zog kuj yog vim li cas rau nws tej chaw.
Titanium alloy: Nyob rau hauv aerospace thiab aviation kev lag luam, high-strength screws ua los ntawm titanium alloy yog heev nyiam vim lawv lub teeb yuag, siab zog, tsis tshua muaj hardness, kub kuj, thiab zoo heev corrosion kuj. Txawm hais tias qhov nyuaj thiab tus nqi siab ntawm kev ua haujlwm, nws ua haujlwm tsis zoo nyob rau hauv huab cua.
Noj rau hauv tus account lub chaw ua hauj lwm ntawm screws, xws li huab cua kub kam rau ua, tshwj xeeb corrosion kuj yuav tsum tau, raws li zoo raws li lawv plasticity, cuam tshuam toughness, thiab muaj peev xwm los tiv thaiv ncua kev puas tsuaj, yog ib qho tseem ceeb kauj ruam nyob rau hauv kev xaiv cov khoom. Raws li qib thiab cov qauv kev ua haujlwm tshwj xeeb ntawmntsia hlau, kev xaiv meej ntawm cov qauv khoom siv tuaj yeem ua kom zoo tshaj plaws ntawm kev siv cov khoom siv zoo, kom ntseeg tau tias lub zog muaj zog screws uas tsim tau tuaj yeem ua tau raws li cov txheej txheem nruj hauv txhua yam ntawm kev ua haujlwm.
