金属热处理 ›› 2025, Vol. 50 ›› Issue (4): 85-88.DOI: 10.13251/j.issn.0254-6051.2025.04.012

• 材料研究 • 上一篇    下一篇

C、N含量对NS1402耐蚀合金晶间腐蚀性能的影响

舒玮, 谷宇   

  1. 山西太钢不锈钢股份有限公司 技术中心, 山西 太原 030003
  • 收稿日期:2024-10-29 修回日期:2025-01-13 发布日期:2025-06-13
  • 作者简介:舒 玮(1982—),男,高级工程师,博士,主要研究方向为镍基合金材料,E-mail:Shuwei@tisco.com.cn
  • 基金资助:
    山西省科技创新人才团队(202204051002022)

Effect of C and N contents on intergranular corrosion property of NS1402 corrosion-resistant alloy

Shu Wei, Gu Yu   

  1. Technology Center of Shanxi Taiyuan Stainless Steel Co., Ltd., Taiyuan Shanxi 030003, China
  • Received:2024-10-29 Revised:2025-01-13 Published:2025-06-13

摘要: 研究了不同C、N含量对NS1402合金晶间腐蚀性能的影响。结果表明,NS1402合金试样经675 ℃和750 ℃敏化处理后的微观组织中无析出物产生。675 ℃敏化条件下,当N含量小于0.01%时,降低C含量对合金晶间腐蚀速率的影响较小。敏化温度升高至750 ℃后,C、N含量均在0.01%以上的晶间腐蚀试样表现出较为严重的腐蚀特征,平均腐蚀率为0.03 mm/月,腐蚀深度达24 μm。C、N含量降低至0.01%以下后,合金在750 ℃敏化条件下表现出优良的耐晶间腐蚀性能,平均腐蚀率只有0.01 mm/月。

关键词: NS1402耐蚀合金, C含量, N含量, 晶间腐蚀

Abstract: Effects of different C and N contents on intergranular corrosion property of NS1402 alloy was investigated. The results show that no precipitate is produced in the microstructure of the NS1402 alloy after sensitization at 675 ℃ and 750 ℃. When the sensitization temperature is 675 ℃, reducing the C content has little effect on the intergranular corrosion rate of the alloy with the N content of less than 0.01%. When raising the sensitization temperature to 750 ℃, the intergranular corrosion of the alloy with both the C and N contents above 0.01% shows relatively serious corrosion characteristics as the average corrosion rate is 0.03 mm/month and the corrosion depth is to 24 μm. However, the intergranular corrosion of the alloy with both the C and N contents below 0.01% exhibits excellent intergranular corrosion resistance under the sensitization temperature of 750 ℃, and the average corrosion rate is only 0.01 mm/month.

Key words: NS1402 corrosion-resistant alloy, C content, N content, intergranular corrosion

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