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SAF2205雙相不銹鋼織構與沖壓特性

Texture and stamping properties of SAF 2205 duplex stainless steel

  • 摘要: 研究SAF 2205雙相不銹鋼冷軋退火板的沖壓特性以及冷軋和退火織構對其沖壓性能的影響.實驗鋼冷軋退火板表現出較差的深沖性能和明顯的45°制耳,其r平均值和Δr值分別為0.7和-0.27,這主要與其在冷軋及退火后形成的織構有關.ODF圖顯示,退火后SAF 2205雙相不銹鋼中鐵素體相未形成γ纖維再結晶織構,仍然為分散的α纖維織構.實驗鋼中鐵素體相的織構強度明顯高于奧氏體相,其對鋼板成形性的影響更顯著,即其各種〈110〉退火織構組分均不利于實驗鋼r平均值的提高,并且使得Δr<0.此外,奧氏體相的110〈001〉織構也對鋼板成形性能產生一定程度的影響.

     

    Abstract: The effects of cold rolling and annealing texture on the drawability of SAF 2205 duplex stainless steel were investigated. It is found that the deep drawability of SAF 2205 duplex stainless steel is poor with an average r value of 0.7 and the earing appears at 45° with a Δr value of -0.27,which is related with the texture formed during cold rolling and annealing. ODF results show that no γ fiber recrystallization texture forms in ferritic phase and the scattered α fiber texture still remains after annealing. Moreover,the ferritic texture exhibits a higher intensity than the austenitic one,thus it has more significant effect on the formability of the tested steel. It means that various components of the 〈110〉texture cause low average r values and make Δr<0. Furthermore,the 110〈001〉texture of austenite exerts some effect on the formability of the sheet.

     

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