Microalloying thev naus laus zis yog kev qhuab qhia metallurgical tshiab uas tau tshwm sim hauv thoob ntiaj teb metallurgical zej zog hauv 1970s. Microalloyed steel yog cov khoom siv high-tech steel uas tsim los ntawm kev siv cov txheej txheem metallurgical niaj hnub no. Nws yog tsim los ntawm kev ntxiv cov lej (feem ntau tsawg dua 0.1% los ntawm huab hwm coj) ntawm cov khoom muaj zog carbonitride-forming (xws li niobium, vanadium, titanium, thiab lwm yam) rau C-Mn steel zoo tib yam lossis qis-alloy steel rau alloying. Cov hlau yog tsim los ntawm cov txheej txheem siab purity smelting (degassing, desulfurization thiab suav nrog morphology tswj). Thaum lub sij hawm ua, cov txheej txheem tshiab xws li tswj dov / tswj cua txias yog siv. Los ntawm lub cev metallurgical txheej txheem ntawm kev tswj cov nplej refinement ntawm steel thiab carbonitride nag lossis daus, ib qho kev tsim cov khoom siv nrog cov khoom siv zoo tshaj plaws xws li lub zog siab, siab toughness, siab weldability, thiab zoo formability yog tau nyob rau hauv lub kub dov lub xeev - microalloyed hlau.
(1) Cov ntsiab lus carbonitride-forming ntxiv ua rau lawv muaj kev cuam tshuam rau cov khoom siv hluav taws xob ntawm cov hlau los ntawm kev sib cais-ua nag lossis daus tus cwj pwm thaum cua sov thiab txias ntawm cov hlau.
(2) Tus nqi ntawm cov ntsiab lus ntxiv yog me me, thiab lub zog ntawm cov hlau yog feem ntau zoo nplej ntxiv dag zog thiab nag lossis daus.
(3) Kev tswj dov thiab tswj cov txheej txheem txias txias ntawm cov hlau yog qhov tseem ceeb rau cov hlau tsis muaj hlau, thiab tseem yog lub hauv paus rau microalloyed steel hu ua hom tshiab ntawm cov hlau tsis tshua muaj zog. Microalloying ntawm steel thiab tswj dov thiab tswj cov tshuab cua txias ua kom sib ntxiv thiab yog qhov tseem ceeb ua ntej rau kev tsim thiab tsim cov hlau microalloyed.
Seamless hydraulic raj
