Research on Damages Caused by Valve Quenching Cracks
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摘要: 对裂纹损伤的阀门开展化学成分分析、扫描电子显微镜(SEM)分析、断口裂纹分析及洛氏硬度分析,得出以下结论:阀门材料的化学成分和洛氏硬度均满足设计要求,阀芯裂纹是由于材料中碳化物的大小及分布不均匀所产生的带状偏析现象造成的淬火裂纹,其现象产生于锻轧过程。Abstract: Work carried out with chemical analysis, microstructure analysis, crack fracture analysis and Rockwell hardness analysis find out that the materials chemistry and Rockwell hardness of the value meet the design requirements. The spool crack result of the ribbon of segregation in course of the size and the uneven distribution of carbides materials in the forging rolling producing is quenching crack.
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Key words:
- Quenching crack /
- Valve damage /
- Crack fracture analysis
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