AH40 steel phaj yog cov ntsiab lus dav dav rau hlau-carbon alloys nrog cov ntsiab lus carbon ntawm 0.02% thiab 2.11%. Cov tshuaj muaj pes tsawg leeg ntawm ntau yam ntawm AH40 shipbuilding steel daim hlau tuaj yeem sib txawv heev. Cov hlau uas muaj cov ntsiab lus tsuas yog hu ua carbon steel (carbon steel) lossis cov hlau zoo tib yam; Hauv kev tsim khoom tiag tiag, steel feem ntau muaj cov ntsiab lus sib txawv raws li kev siv sib txawv. , xws li: manganese, npib tsib xee, thiab lwm yam. Muaj ntau hom AH40 shipbuilding steel daim hlau.
Shaoguan hlau ore nqi muaj cov yam ntxwv ntawm "yooj yim nce tab sis nyuaj rau poob" thiab "ceev kom sawv thiab qeeb qeeb". Tom qab cov hlau ore tau muab tso rau hauv kev ua lag luam, ntau tshaj 100 lab tons ntawm cov hlau ore chaw cov khoom khaws cia los ntawm qhov chaw nres nkoj tau ntev tau muab tso rau hauv cov txheej txheem tsim nqi, ua rau tus nqi luv nqi rau Platts tus nqi ntev, uas muaj. muaj kev cuam tshuam zoo rau kev ua haujlwm ntawm Platts index. Tib neeg muaj keeb kwm ntev ntawm daim ntawv thov thiab kev tshawb fawb ntawm hlau. Txawm li cas los xij, kom txog rau thaum qhov kev tsim ntawm Baynest steelmaking txoj kev nyob rau hauv lub xyoo pua 19th, kev tsim cov hlau yog ib qho kev ua haujlwm siab thiab ua haujlwm tsawg. Niaj hnub no, steel tau dhau los ua cov khoom siv ntau tshaj plaws hauv ntiaj teb vim nws cov nqi qis thiab kev ua tau zoo. Nws yog ib qho tseem ceeb ntawm kev tsim kho kev lag luam thiab tib neeg lub neej txhua hnub. Nws tuaj yeem hais tias hlau yog lub hauv paus ntawm lub neej niaj hnub.
Qhov tso cai sib txawv ntawm qhov chaw thiab cov duab geometric ntawm AH40 steel daim hlau yog tshwj xeeb hauv. Nws teev tus nqi tso cai ntawm corrugated khoov (sickle khoov) ntawm cov channel steel thiab qhov cuam tshuam tsis zoo ntawm cov duab ntawm cov channel steel ntawm txhua qhov tshwj xeeb (h, b, d, t, thiab lwm yam) tus nqi thiab kam rau ua tus nqi. Lub ntsiab yog vim li cas rau qhov tsis raug geometric duab ntawm cov channel steel yog: cov ces kaum, ceg nthuav dav thiab ceg kev sib koom ua ke, thiab lwm yam. Muaj ntau hom AH40 nkoj tsim steel daim hlau, thiab cov hauv paus ntsiab lus ntawm "oversupply" nyob rau hauv Shaoguan ib zaug dua dragged down ore nqi. . Cov laj thawj tseem ceeb rau qhov kev poob qis no yog qhov sib sau ntawm cov khoom muag ntawm cov chaw nres nkoj thiab qhov poob ntawm cov khoom siv hluav taws xob ua haujlwm ntawm cov nroj tsuag qis qis.
