摘要
分析得出了济钢厚规格LK490C钢板探伤不合的主要原因是由于钢板严重的中心偏析带附近出现的细小裂纹所致。通过控制钢中P、S等有害元素含量,采用铸坯及钢板缓冷工艺,并适当提高轧制道次压下量,使得钢板内部质量有了明显改善,保证了钢板的探伤合格率。
The article considered that the detection disqualification is resulted by small cracks nearby serious centerline segregation zone through ultrasonic flaw detection to LK490C heavy plate of Jinan Steel. By well controlling contents of the sulfur and phosphor in steel, adopting slab and plate slow-cooling process and increasing pass reduction, internal plate quality was greatly improved. It ensured the conformity rate in flaw detection.
出处
《山东冶金》
CAS
2012年第3期40-41,43,共3页
Shandong Metallurgy
