《Table 6:Mn-equivalent for several elements favoring (+) or preventing (-) pearlite[3]》

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《Selection of raw materials and control of trace elements for production of high-quality SG iron》

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However，tramp elements Bi，Sb，Pb and Sn are all strong pearlite stabilizers（see Table 6）and their addition can result in pearlite formation[3].Therefore，care must be taken to ensure addition rates are accurate and consideration must be given to the potential build-up of Bi and Sb in foundry SG iron returns.