Establishment of SCC retardation model considered with potential aging degradation in low-carbon stainless steel welds

考虑低碳不锈钢焊缝潜在时效退化的SCC延迟模型的建立

• 批准号: 22760070
• 负责人: ABE Hiroshi
• 金额: $ 2.58万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22760070/
• 关键词: ステンレス鋼; 溶接部; 凝固モード; 応力腐食割れ; 熱時効; スピノーダル分解; δ-フェライト; 低温時効; オーステナイト系ステンレス鋼; 溶接金属; δーフェライト

Hardening rate of δ-ferrite in low-carbon austenitic stainless steel welds has been evaluated by thermal treatment at 310-410 oC. The hardening rate of that in boiling water reactor coolant temperature has been predicted based on the above results. Effect of aging on corrosion characteristics and stress corrosion cracking (SCC) behavior of welds have been evaluated by SCC experiments in high-temperature water. Crack growth rate in δ-ferrite has also been evaluated semi-quantitatively.

用310-410oC热处理方法评价了低碳奥氏体不锈钢焊缝中δ-铁素体的硬化速率。在此基础上，预测了沸水堆冷却剂温度下的硬化速率。通过高温水中应力腐蚀试验，评价了时效对焊缝腐蚀特性和应力腐蚀开裂行为的影响。还对δ铁素体的裂纹扩展速率进行了半定量评价。

项目成果

Effects of solidification mode and low-temperature aging on SCC behavior of type 316L SS welds in high-temperature water

凝固方式和低温时效对316L不锈钢焊缝在高温水中SCC行为的影响

• 发表时间: 2011
• 期刊: Proceedings of 19th International Conference on Nuclear Engineering
• 作者: Hiroshi Abe;Yutaka Watanabe;Takamichi Miyazaki
• 通讯作者: Takamichi Miyazaki

SUS316L溶接金属中δ-フェライトの310℃および335℃におけるスピノーダル分解速度の評価

SUS316L焊缝金属在310℃和335℃下δ-铁素体旋节线分解速率的评价

• 发表时间: 2011
• 作者: 寺尾俊彦;渡辺豊;阿部博志
• 通讯作者: 阿部博志

316系低炭素ステンレス鋼溶接金属の低温時効硬化現象に関する研究

316系低碳不锈钢焊缝金属低温时效硬化现象研究

• 发表时间: 2011
• 作者: 寺尾俊彦;阿部博志;渡辺豊
• 通讯作者: 渡辺豊