4Cr2MoVNi(代号B2)低合金热作模具钢(18562437778) 4Cr2MoVNi(代号B2)等大截面热锻模具钢。与5CrNiMo相比,45Cr2和5Cr2中既含有较高的Cr和Mo,又加入了少量的V,使CCT曲线上的高温转变区上移,低温转变区***右移,提高了钢的淬透性。截面尺寸在500*500mm以下的模具经970-990℃淬火,650~680℃回火后,硬度可达HRC36-44。45Cr2和5Cr2还具有二次硬化能力,它们的高温强度较5CrNiMo钢高50%,热稳定性高出100~150℃,冲击韧性则相当。另外,钢的热磨损性、热疲劳性及抗热裂纹扩展的能力也强于5CrNiMo。这二种钢用于12000t以下机械压力机模具及16t以下模锻模具,模具的使用寿命是5CrNiMo钢制造的同种模具寿命的数倍。 4cr2movni(B2)圆棒,4cr2movni(B2)钢棒,4cr2movni(B2)板材,4cr2movni(B2)板料,4cr2movni(B2)光圆,4cr2movni(B2)圆钢,4cr2movni(B2)锻圆,4cr2movni(B2)小圆棒,4cr2movni(B2)棒材,4cr2movni(B2)材料,4cr2movni(B2)厂家,4cr2movni(B2)批发,4cr2movni(B2)钢材,4cr2movni(B2)薄板,4cr2movni(B2)模具钢,4cr2movni(B2)模具材料,4cr2movni(B2)报价,4cr2movni(B2)价格,4cr2movni(B2)销售,4cr2movni(B2)加工,4cr2movni(B2)模具钢材,4cr2movni(B2)光板,4cr2movni(B2)精板,4cr2movni(B2)棒料,4cr2movni(B2)扁钢,4cr2movni(B2)切割,4cr2movni(B2)板,4cr2movni(B2)批发,4cr2movni(B2)棒,4cr2movni(B2)厂家,4cr2movni(B2)用途,4cr2movni(B2)圆料,4cr2movni(B2)批发,4cr2movni(B2)零售,4cr2movni(B2)现货,4cr2movni(B2)定尺切割,4cr2movni(B2)中厚板,4cr2movni(B2)大厚度,4cr2movni(B2)大圆棒,4cr2movni(B2)标准,4cr2movni(B2)什么材质,4cr2movni(B2)什么材料,4cr2movni(B2)精光板,4cr2movni(B2)毛料,4cr2movni(B2)多少钱一公斤,4cr2movni(B2)多少钱一吨。