摘要
２０ＭｕＳｉ、２０钢和４５钢铸坯内部裂纹与偏析带相互混杂分布在柱状品区。偏析带有较高的磷含量及ＭｎＳ夹杂。而这些ＭｎＳ夹杂在低倍酸蚀时由于选择腐蚀而造成了“裂纹”的假象，这些裂纹无法用超声进行预检。当轧制比在１５～２０时可基本消除这种缺陷。
It is observed that the internal cracks together with segregated narrow- band were developed at columnar zone of steel 20,45,20MuSt continuous casting billets. As MnS inclusions were eaten out at segregated narrow- band on macroetched sample, the imitative cracks were appeared, that couldn't be detected using ultrasonic testing. This defect eliminated essentially after rolling with forging ratio from 15 to 20.
出处
《特殊钢》
北大核心
1994年第4期45-47,共3页
Special Steel
关键词
内部裂纹
偏析带
连铸坯
internal Cracks,Segregated Band,Concasting Billet
