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Effect of aging on the impact toughness of 25Cr-20Ni-Nb-N steel

机译:时效对25Cr-20Ni-Nb-N钢冲击韧性的影响

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摘要

The impact toughness evolution of 25Cr-20Ni-Nb-N stainless steel during aging for different time at 973 K has been systematically investigated. It is found that the impact toughness of 25Cr-20Ni-Nb-N stainless steel declines sharply in the early stage of the aging (about 500 h). Thereafter, the impact toughness decreases slowly with the increase in aging time. The hardness on grain boundaries and within grains is analyzed by micro-indentation. The results of micro-indentation show that the hardness in grains during aging is higher than that on grain boundaries due to the precipitation of M_(23)C_6 and the decrease of the impact toughness of 25Cr-20Ni-Nb-N can be attributed to the reduction of the bonding interface strength when M_(23)C_6 precipitated on grain boundaries.
机译:系统研究了25Cr-20Ni-Nb-N不锈钢在973 K时效下不同时间的冲击韧性演变。结果表明,25Cr-20Ni-Nb-N不锈钢的冲击韧性在时效初期(约500 h)急剧下降。此后,冲击韧性随着时效时间的增加而缓慢降低。通过微压痕分析了晶界和晶粒内的硬度。显微压痕结果表明,由于M_(23)C_6的析出,时效时晶粒的硬度高于晶界的硬度,而25Cr-20Ni-Nb-N冲击韧性的降低可归因于M_(23)C_6析出在晶界上时,界面强度降低。

著录项

  • 来源
    《Materials Science and Engineering》 |2010年第8期|1957-1961|共5页
  • 作者单位

    School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai 200240, China;

    School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai 200240, China Steel Pipe Department, Baosteel Research Institute, Baoshan Iron & Steel Co., Ltd, Shanghai 201900, China;

    Steel Pipe Department, Baosteel Research Institute, Baoshan Iron & Steel Co., Ltd, Shanghai 201900, China;

    Steel Pipe Department, Baosteel Research Institute, Baoshan Iron & Steel Co., Ltd, Shanghai 201900, China;

    School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai 200240, China Steel Pipe Department, Baosteel Research Institute, Baoshan Iron & Steel Co., Ltd, Shanghai 201900, China;

    School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai 200240, China Steel Pipe Department, Baosteel Research Institute, Baoshan Iron & Steel Co., Ltd, Shanghai 201900, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    25Cr-20Ni-Nb-N; M_(23)C_6 carbides precipitation; impact toughness; aging; fracture;

    机译:25Cr-20Ni-Nb-N;M_(23)C_6碳化物沉淀;冲击韧性老化;断裂;

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