2014年3月8日星期六

Tsingtek grade 1 titanium tube

Titanium tube normalizing the purpose and characteristics
Tsingtek grade 1 titanium tube in Ac3 transformation point ( usually Ac3 +50 ℃). Organization of hot rolled steel S355 ferrite - pearlite purpose , normalizing process is to refine the organization , so that even the organization , improve the toughness of the steel.
    Refinement of the original degree of organization and related organizations . For rolled steel can not be controlled , especially thick section steel, by normalizing the grain refinement can be achieved very good results. For thin section of steel , may not reach the normalized object refinement , in this case , the rolling process can be considered to control the rolling process , usually called " normalizing rolling " , zirconium plate organization and the hot-rolled microstructure and properties similar performance after normalizing .
    Usually normalized Nb improve the tensile strength of steel , grade 2 titanium wire tube can prevent austenite grain growth , expansion of γ -phase region . In steels containing Si , this effect is particularly evident. Normalizing temperature between 900 ℃ and 1050 ℃, Nb content of 0.02% to 0.04%, enough to make the grain size reaches 10 . On the contrary , when the Si -containing steels contain Nb, normalizing temperature is 1000 ℃ , the grain size of 7 .
    Nb carbonitrides and nitrides of Al , as in 1050 ℃ still be able to prevent austenite grain growth , this effect is particularly important , even in a non-uniform furnace temperature heat treatment furnace can be obtained fine ferrite body - pearlite .

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