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3Cr2MoVNi(B2)模具鋼,圓棒,板材,零切,光板,精板

2022-06-14 08:49 作者:上海利佳特殊鋼公司  | 我要投稿

3Cr2MoVNi(代號B2)低合金熱作模具鋼(13524351833)

3Cr2MoVNi(代號B2)等大截面熱鍛模具鋼。與5CrNiMo相比,45Cr2和5Cr2中既含有較高的Cr和Mo,又加入了少量的V,使CCT曲線上的高溫轉(zhuǎn)變區(qū)上移,低溫轉(zhuǎn)變區(qū)顯著右移,提高了鋼的淬透性。截面尺寸在500*500mm以下的模具經(jīng)970-990℃淬火,650~680℃回火后,硬度可達HRC36-44。45Cr2和5Cr2還具有二次硬化能力,它們的高溫強度較5CrNiMo鋼高50%,熱穩(wěn)定性高出100~150℃,沖擊韌性則相當。另外,鋼的熱磨損性、熱疲勞性及抗熱裂紋擴展的能力也強于5CrNiMo。這二種鋼用于12000t以下機械壓力機模具及16t以下模鍛模具,模具的使用壽命是5CrNiMo鋼制造的同種模具壽命的數(shù)倍。


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