稀土氧化钇对高强度钢焊条熔敷金属组织和性能影响

刘仁培; 蔡养川; 魏艳红; 成中庚

稀土氧化钇对高强度钢焊条熔敷金属组织和性能影响

南京航空航天大学材料科学与技术学院, 南京 211106

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- 收稿日期: 2013-10-07

Effect of yttrium oxide on microstructure and mechanical properties of in high strength steel weld metal

College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

摘要

摘要: 基于Ni-Cr-Mo-V合金体系,研究了稀土氧化钇对800 MPa高强度钢焊条焊缝微观组织和性能的影响.结果表明,Y₂O₃含量在0~0.02%范围内变化时,随着Y₂O₃含量的增加,焊缝熔敷金属组织中先共析铁素体逐渐降低,针状铁素体含量逐渐增加,强度和低温冲击韧性均逐渐增加,且当Y₂O₃含量为0.02%时,焊缝熔敷金属低温冲击韧性达到最大值;当Y₂O₃含量超过0.02%时,焊缝熔敷金属组织中针状铁素体含量下降,低温冲击韧性降低.综合考虑上述因素,该高强度钢焊条中Y₂O₃最佳添加量为0.02%左右.
- 稀土氧化钇 /
- 800MPa高强度钢焊条 /
- 针状铁素体 /
- 低温冲击韧性
Abstract: Based on Ni-Cr-Mo-V alloy system, the effect of yttrium oxide on microstructure and mechanical properties of weld made with 800 MPa high strength steel electrode was investigated. Experimental results show that, as the Y₂O₃ content changed in 0~0.02%, with the increase of Y₂O₃ content, the proeutectoid ferrite content reduced, the acicular ferrite content increased, and the strength and low-temperature impact toughness increased gradually. When the Y₂O₃ content was 0.02%, the low-temperature impact toughness of weld metal reached the maximum. When the Y₂O₃ content was over 0.02%, the acicular ferrite content in the weld reduced, and the low-temperature impact toughness decreased. Therefore, the optimum Y₂O₃ content for high strength steel electrode is about 0.02%.
- yttrium oxide /
- 800 MPa high-strength steel electrode /
- acicular ferrite /
- low-temperature impact toughness

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参考文献(13)

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稀土氧化钇对高强度钢焊条熔敷金属组织和性能影响

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Effect of yttrium oxide on microstructure and mechanical properties of in high strength steel weld metal

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