904L不锈钢荒管开裂原因  

Reasons for cracking of 904L stainless steel pierced billet

作　　者：谢金宏 XIE Jinhong(Shanghai Key Laboratory of Engineering Materials Application and Evaluation,Shanghai Research Institute of Materials,Shanghai 200437,China)

机构地区：[1]上海材料研究所上海市工程材料应用与评价重点实验室,上海200437

出　　处：《理化检验（物理分册）》2024年第5期39-41,45,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：某904L不锈钢荒管在穿孔工艺后,其内壁发生开裂现象。采用宏观观察、化学成分分析、力学性能测试、扫描电镜及能谱分析、金相检验等方法分析了该荒管开裂的原因。结果表明:荒管穿孔前近内表面存在疏松缺陷,在穿孔工艺应力的作用下,沿疏松缺陷处萌生裂纹,最终导致荒管发生开裂。Cracking was found on the inner wall of a 904L stainless steel pierced billet after perforation process.The reason for the cracking of the pierced billet was analyzed using methods such as macroscopic observation,chemical composition analysis,mechanical property testing,scanning electron microscopy and energy spectrum analysis,and metallographic examination.The results show that there were loose defects on the inner surface of the pierced billet before perforation.Under the stress of the perforation process,cracks initiated along the loose defects,ultimately led to cracking of the pierced billet.

关 键 词：904L不锈钢 荒管 开裂 疏松缺陷 孔洞 

分 类 号：TB31[一般工业技术—材料科学与工程] TG115.2[金属学及工艺—物理冶金]