TP321不锈钢无缝钢管晶间腐蚀问题研究

Research on Intergranular Corrosion of TP321 Seamless Stainless Steel Pipe

摘要: 对影响TP321不锈钢无缝钢管耐晶间腐蚀性能的因素进行分析，从化学成分、金相组织、工艺流程、热处理制度等方面研究可能导致耐蚀性降低的原因，并采取措施消除不利影响。通过控制化学成分、调整热处理制度以及优化脱脂工艺等一系列改进措施，使TP321不锈钢无缝钢管晶间腐蚀试验一次合格率稳定在95%以上水平。

Abstract: Analyzed here in the article are the factors affecting intergranular corrosion resistance of the TP321 seamless stainless steel pipe, involving such aspects as chemical composition, metallographic structure, process flow, heat treatment schedule, etc.Accordingly, relevant actions are taken to eliminate the negative effects.Thanks to implementation of improvement actions like chemical composition control, adjusting heat treatment schedule, and optimizing the degreasing process, etc., the primary qualification rate of intergranular corrosion test to the TP321 seamless steel pipes has been kept at the level above 95%.