| 摘要: |
| 采用光学金相、显微硬度计、X射线衍射仪、冲击试验机等方法研究了Na变质剂对铁铬碳堆焊合金组织及性能的影响。结果表明：随着Na变质剂加入量的增加，合金基体组织逐渐由共晶奥氏体和一定量马氏体全部转化为初生奥氏体且奥氏体显著硬化，碳化物尺寸逐渐减小，对基体的割裂作用大大减少且分布更为均匀，当钠变质剂添加量为2 %堆焊合金韧性最好，继续添加韧性下降。 |
| 关键词: 堆焊 Na变质剂 韧性 |
| DOI： |
| 分类号: |
| 基金项目:北京市教委服务北京创新人才团队建设项目(00900054R5004) |
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| The Influence of Na Modifier on the Structure and Performance of Fe–Cr–C Hardfacing Alloys |
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JIANG Jian–min, ZHAI Dong–xun, HE Ding–yong, WANG Zhi–hui, ZHOU Zheng, LIU Xu
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College of Materials Science and Engineering, Beijing University of Technology
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| Abstract: |
| The microstructure and properties were analyzed by means of optical microscopy (OM), microhardness tester，X–ray diffraction (XRD), impact testing machine. The result shows that with the content of Na–modifier increase, the matrix microstructure was changed from eutectic austenite and martensite to hardened austenite. The size of primary carbide became greatly fine, it dissevered matrix less seriously and distributed uniformity. The toughness of hardfacing alloys could be best with 2 % Na alloys. When it was added more, the toughness was decreased. |
| Key words: hardfacing Na–modifier toughness |
