钢管2025，Vol.54Issue(4)：31-36,6.DOI:10.19938/j.steelpipe.1001-2311.2025.4.31.36
加工工艺对304不锈钢管材晶间腐蚀行为的影响
Influences of Different Process Technologies on Intergranular Corrosion Behavior of 304 Stainless Steel Tubular Product
严国标 1林宏辉 2郭琦 1李传强 2章争荣2
作者信息
- 1. 广州美亚股份有限公司,广东 广州 511356
- 2. 广东工业大学材料与能源学院,广东 广州 510006
- 折叠
摘要
Abstract
Systematically investigated here in the article are the intergranular corrosion behaviors of the 304 stainless steel tubular product as going through different processing technologies.Also comparatively analyzed are the influences on the microstructure and corrosion resistance of the material by such process steps as tube cutting and bending,water expa-nding,heat treatment and polishing,etc.,and then it is revealed that in case of the macro size,i.e.,10～200 magnifi-cation,none of the process specimen presents any intergranular corrosion,being up to the requirement of applicable specification;while in case of the micro size,i.e.,500 magnification,the post-bending heat treatment specimen pres-ents slight intergranular corrosion;the corrosion is getting more and more serious with the water-expanding process,and even after the water-expanding plus the heat treatment,the corrosion still remains obviously;the polishing process leads to the most serious intergranular corrosion;the analysis of the deformation structure shows that the deformation structure in the external layer of the elbow as being flattened is easy to crack;however heat treatment can eliminate such structure,and get the cracking trend improved.It is finally recommended to improve the polishing process parameters,and add the passivation treatment so as to remarkably enhance the corrosion resistance of the tubular product.关键词
304不锈钢/管材加工/晶间腐蚀/耐蚀性Key words
304 stainless steel/tubular product processing/intergranular corrosion/corrosion resistance引用本文复制引用
严国标,林宏辉,郭琦,李传强,章争荣..加工工艺对304不锈钢管材晶间腐蚀行为的影响[J].钢管,2025,54(4):31-36,6.
