Siab zog steel kub-dip galvanizing tshuab rau hluav taws xob cua sov kav
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Siab zog steel kub-dip galvanizing tshuab rau hluav taws xob cua sov kav
Lub peev xwm plating ntawm high-strength steel yeej ib txwm yog lub hom phiaj ntawm kev tshawb fawb. Lub zog muaj zog hlau feem ntau muaj ntau cov ntsiab lus xws li Si thiab Mn, uas yooj yim ntxiv rau saum npoo ntawm substrate, uas ua rau muaj ntau yam tsis xws luag thaum kub dip galvanizing. Nyiv tau ua tiav kev lag luam ntawm ob theem steel alloy kub dip galvanizing los ntawm kev hloov kho tshuaj lom neeg, tshwj xeeb tshaj yog ntxiv ntawm Mo lub caij. Tsawg Si cov ntsiab lus dual theem steel tau ua lag luam ua lag luam ntawm cov kab kub-dip galvanizing ntau lawm, xws li DP600: 0.07 feem pua ~{{13 }}.10 feem pua C, 1.0 feem pua ~ 1.8 feem pua Mn, 0.4 feem pua Si, 0.6 feem pua ~ 1.2 feem pua (CR plus Mo),<0.01% S,<0.06% P, 0.02%~0.06% Al,<0.03% (Ti+Nb). Its yield strength and tensile strength reached 320MPa and 630MPa, respectively, with a total elongation of 26% and an n value of 0.18. High strength steel with high Si content is still one of the main research directions at present, which requires research on the atmosphere and dew point control in the annealing furnace. Pretreatment of the substrate can also solve the surface enrichment problem of Si and other elements. On the basis of alloyed hot-dip galvanized dual phase steel, Kawasaki Steel Company of Japan has developed 590-980MPa low-carbon equivalent alloyed hot-dip galvanized steel plates with good spot welding performance. Recently, JFE Steel Company in Japan has successfully developed a higher strength grade alloyed hot-dip galvanized dual phase steel.
TRIP steel (tseem hu ua theem transformation induced plasticity steel) muaj qhov zoo heev formability, lub zog, thiab kev cuam tshuam tsis kam, ua rau nws yog ib qho zoo tagnrho steel rau qhov hnyav thiab kev txuag hluav taws xob hauv tsheb. Txawm li cas los xij, ib txwm muaj siab Si cov ntsiab lus TRIP steel tsis haum rau kev tsim khoom ntawm cov kab hluav taws xob kub-dip galvanizing uas twb muaj lawm, vim tias kev nplua nuj ntawm Si tuaj yeem yooj yim ua rau plating tsis xws luag hauv txheej. Txawm hais tias tswj cov dej lwg hauv lub qhov cub annealing tuaj yeem hloov cov tshuaj lom neeg muaj pes tsawg leeg ntawm cov sawb hlau, yog li txhim kho cov txheej txheem zoo, nws tsis tuaj yeem tshem tawm tag nrho cov plating cheeb tsam. Tsis tas li ntawd, qhov kub hloov pauv isothermal siab dhau lawm vim qhov txwv ntawm zinc lauj kaub kub, uas ua rau nws tsis yooj yim sua kom tau txais cov austenite txaus. Kev tshawb fawb tau pom tias TRIP steel tau los ntawm kev hloov Si nrog Al tuaj yeem muaj cov khoom sib piv rau cov tsoos CMnSi hom TRIP steel, thiab nws tsim nyog rau cov txheej txheem kub dip plating thiab muaj cov khoom zoo plating. Txawm li cas los xij, qhov sib ntxiv ntawm Al keeb tau coj ntau yam teeb meem rau steelmaking thiab kub dov txheej txheem, thiab yuav ua li cas los daws cov teeb meem no yog ib qho tseem ceeb ntawm TRIP steel kub dip galvanizing kev tshawb fawb. XVanDenEynDe et al. npaj cov txheej txheem tshiab ntawm preheating Si uas muaj TRIP steel los tsim ib txheej oxide txheej, ua raws li tus kheej txo. Hauv kev tshawb fawb hauv chav kuaj, nws tau pom tias kub-dip galvanized TRIP steel tsim los ntawm cov txheej txheem no muaj kev ua haujlwm zoo plating.
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