摘要
通过运用金相及扫描电镜等手段,对厚规格低合金容器板探伤不合格钢板的内在组织及探伤不合格的原因进行了分析,分析表明,夹杂物导致的微裂纹是钢板探伤不合格的主要原因。提出了降低钢水过热度,采用动态轻压下技术,铸坯、钢板下线堆垛缓冷48h等工艺措施,可有效提高钢板探伤合格率。
Analysis was conducted on the internal structure of nonconformable heavy low alloy pressure vessel plate and the causes for nonconformity by means of metallographic and scanning electron microscope. Analysis showed that the micro crack due to the inclusion was the main reason for plate nonconformity at detection. The authors suggest metallurgical measures of reducing liquid steel superheat and adopting dynamic soft reduction and offline billet and plate 48-hour stack cooling in order to effectively increase the conformity rate at plate inspection.
出处
《天津冶金》
CAS
2011年第2期46-48,62,共3页
Tianjin Metallurgy
关键词
铸坯
规格
容器板
探伤
夹杂物
微裂纹
分析
billet, heavy pressure vessel plate, detection, inclusion, micro crack, analysis
