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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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O,N和Ni含量对0Cr25Ni7Mo4N双相不锈钢热轧塑性的影响*
DOI: 10.11900/0412.1961.2014.00057, PP. 905-912
Keywords: 0Cr25Ni7Mo4N双相不锈钢,相比例,氧化物夹杂,热塑性
Abstract:
对不同O,N和Ni含量的0Cr25Ni7Mo4N双相不锈钢进行了1200℃,4道次热轧实验.利用OM,SEM和EBSD观察分析了实验钢的组织和夹杂物.结果表明,低O,N和Ni含量的实验钢热轧塑性良好.O含量为0.0059%的实验钢中夹杂物主要为Al2O3和MgO·Al2O3,分布于晶粒内部,未对热塑性造成不良影响.O含量为0.038%和0.046%的实验钢则发生了轧制边裂,开裂处为α/γ相界,相界内的大颗粒Cr2O3和MnO2夹杂是造成开裂的主要原因.其中O含量较低(0.038%)的实验钢,由于N和Ni含量过高,使钢中γ相体积分数在热轧状态时高达60%.过多的γ相降低了γ晶粒内部的总应变量,使其不足以发生再结晶软化,最终造成更严重的热轧开裂.
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