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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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2.25Cr-1Mo-0.25V钢焊缝中第二相高温回火转变
, PP. 51-57
Keywords: 焊缝,第二相,碳化物,回火,低合金钢2.25Cr--1Mo--0.25V
Abstract:
利用TEM和EDX技术,研究了2.25Cr-1Mo-0.25V钢焊缝中第二相在700℃下保温一系列时间段的转变.结果表明,焊后空冷焊缝中的第二相为M3C,回火过程中第二相主要组成为M3C+M7C3+M23C6.长时间回火后M3C发生球化并消失,初期析出的低wCr/wFe(Cr与Fe的质量比)的M7C3是亚稳相,M23C6只能在较低的回火参数范围内存在,后期形成了wCrwFe更高的M7C3稳定的第二相.M3C多呈球状,M7C3和M23C6多为长条状和块状.
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