Nkoj phaj yog cov khoom siv los ua cov nkoj nkoj, feem ntau yog ua los ntawm steel, aluminium alloy, fiberglass thiab lwm yam ntaub ntawv. Ntawm lawv, steel nkoj daim hlau yog ib qho ntawm cov khoom siv ntau tshaj plaws, thiab lawv cov khoom siv thiab kev ua tau zoo muaj feem cuam tshuam rau lub zog, kev tiv thaiv corrosion thiab kev pabcuam lub neej ntawm lub nkoj. Cov hauv qab no yuav txheeb xyuas cov khoom siv nkoj nkoj thiab qhia txog nws cov khoom siv.
1. Steel nkoj daim hlau
Steel nkoj phaj yog ib qho ntawm feem ntau siv cov ntaub ntawv hull, feem ntau yog tsim los ntawm hlau, carbon thiab ib tug me me ntawm alloy ntsiab. Ntawm lawv, hlau yog cov khoom tseem ceeb ntawm lub nkoj phaj, cov pa roj carbon tuaj yeem ua rau lub zog thiab hardness ntawm lub nkoj phaj, thiab cov ntsiab lus alloying tuaj yeem txhim kho corrosion thiab lwm yam khoom ntawm lub nkoj phaj.
Cov txheej txheem tsim khoom ntawm steel nkoj daim hlau suav nrog ob txheej txheem: kub dov thiab txias dov. Cov txheej txheem kub dov yog smelt hlau ore rau hauv cov hlau molten ntawm qhov kub thiab txias, thiab tom qab ntawd ua tiav rau hauv ib lub phaj steel ntawm ib lub thickness ntawm ib lub rolling zeb; Cov txheej txheem txias dov yog ua kom kub-kuav los tiag steel phaj nrog ib lub thickness thiab nto zoo los ntawm pickling, txias dov, annealing thiab lwm yam txheej txheem. hlau phaj.
Qhov zoo ntawm steel nkoj daim hlau muaj xws li siab zog, hardness, thiab zoo corrosion kuj. Nws qhov tsis zoo yog qhov hnyav, uas tsis haum rau lub teeb yuag ntawm lub nkoj. Nyob rau tib lub sijhawm, tus nqi ntawm steel nkoj daim hlau kuj yog siab dua.
2. Aluminium alloy nkoj daim hlau
Aluminium alloy nkoj phaj yog lub teeb yuag, cov khoom siv lub zog siab, feem ntau yog ua los ntawm txhuas, magnesium, silicon thiab lwm yam khoom. Qhov zoo ntawm aluminium alloy nkoj daim hlau muaj xws li lub teeb yuag, zoo corrosion kuj, thiab zoo thermal conductivity. Nws qhov tsis zoo yog tus nqi siab dua thiab tsis muaj kev cuam tshuam tsis zoo.
Kev tsim cov txheej txheem ntawm aluminium alloy nkoj daim hlau suav nrog casting thiab extrusion. Cov txheej txheem casting yog smelt aluminium rau hauv cov kua thiab hliv rau hauv pwm kom txias thiab khov; Cov txheej txheem extrusion yog ua cov txheej txheem aluminium ingots rau hauv aluminium alloy profiles ntawm qee yam duab los ntawm lub tshuab extrusion.
