中厚板超声波探伤不合格的影响因素研究

炼钢

中厚板超声波探伤不合格的影响因素研究

安阳钢铁股份有限公司，河南安阳 455004

接受日期:1900-01-01 出版日期:2014-06-05

Study on factors affecting the disqualification of heavy and medium plate by ultrasonic detection

Accepted:1900-01-01 Online:2014-06-05

摘要/Abstract

摘要： 在宏观统计探伤合格率的基础上，通过对比分析探伤合格与不合格钢板试样的低倍、微观组织和能谱成分等试验结果，发现影响该厂中厚板探伤不合格的主要因素为严重的中心偏析和钢中氢共同作用在钢板心部产生的微裂纹。通过采取降低钢中氢含量、减轻铸坯中心偏析、分规格分钢种优化生产组织与工艺流程等措施，使钢板探伤合格率得到显著提高，25 mm及以上厚度钢板探伤合格率由88.61 %提高到96.27 %，薄规格钢板由97.08 %提高到98.44 %。

关键词: 探伤, 偏析, 氢, 裂纹

Abstract: On the basis of statistical analysis of qualified ratio for ultrasonic detection, the qualified and unqualified samples of heavy and medium plates by ultrasonic detection were analyzed through macrostructure examination，metallographic examination and SEM analysis etc. Results showed that the main factor affecting the disqualification of heavy and medium plate by ultrasonic detection were the small cracks in the center of steel plates, which resulted from the combined action of center segregation and the hydrogen of steel. The qualified ratio of steel plates 25 mm or above by ultrasonic detection were increased evidently by reducing the content of hydrogen in steel, improving the center segregation of slabs simultaneously and optimizing the production plan and process flow for different steel grades with different thickness, and then the qualified ratio of heavy steel plates（25 mm or above） and sheet steel by ultrasonic detection were increased from 88.61 % to 96.27 % and from 97.08 % to 98.44 %.

Key words: ultrasonic detection, segregation, hydrogen, crack

裴凤娟，段贵生，徐筱芗，黄重. 中厚板超声波探伤不合格的影响因素研究[J]. 炼钢.

[1]	付雨潇1,2,朱立光2,3,孙立根1,2,周景一1,2,胡海亮1,2. 含Nb高强钢高温凝固特性与物性参数的计算[J]. 炼钢, 2020, 36(2): 34-41.
[2]	徐旺1,2，刘增勋1,2，肖鹏程1,2,朱立光2,3. 方坯表面纵裂的数值模拟研究[J]. 炼钢, 2020, 36(2): 48-52.
[3]	张利民,2，朱立光1,,田鹏1,2，肖鹏程1,2，刘增勋1,2，张彩军1,2. 65Mn钢冷轧起皮缺陷分析与控制[J]. 炼钢, 2020, 36(2): 63-69.
[4]	张洪才，林鹏，许正周，印传磊，翟万里，许光乐. Φ380 mm 40Cr钢连铸圆坯结晶器电磁搅拌器电流参数优化 [J]. 炼钢, 2019, 35(6): 41-45.
[5]	周庆龙，蒋一，竺安果，江来珠. 节镍奥氏体不锈钢表面质量改善研究[J]. 炼钢, 2019, 35(6): 72-76.
[6]	李强，赵家七，蔡小锋，邹长东. 管线钢钙处理工艺优化[J]. 炼钢, 2019, 35(5): 37-42.
[7]	孙江波，翟晓毅，徐斌，陈晓辉. HRB400E棒材堆钢原因分析及控制措施[J]. 炼钢, 2019, 35(5): 54-56.
[8]	从俊强1，仇圣桃1，米进周2，张兴中1，杨文峰2，康健英3. 基于LMBP-MIV的板坯表面纵裂纹成因在线判定[J]. 炼钢, 2019, 35(4): 59-65.
[9]	苏瑞先1，陈志平2. 16MnCr5连铸板坯中心偏析的控制研究[J]. 炼钢, 2019, 35(3): 42-46.
[10]	付振坡1，李双江1，2，龙杰1，付东阳1，孔祥丽1，甄光楠1. 超厚板长度定尺探伤不合原因分析[J]. 炼钢, 2019, 35(3): 68-73.
[11]	刘启龙1，朱伦才2，曹成虎1，崔磊2，舒宏富2,郑晴1. 超高强汽车用钢QP980铸坯质量控制[J]. 炼钢, 2019, 35(2): 46-50.
[12]	康伟1，2，吕志升1，2，孙群3，王洪涛3，栗红1，2，廖相巍1，2. 连铸坯角部裂纹控制技术研究[J]. 炼钢, 2019, 35(1): 66-70.
[13]	王向红，张建斌，屠兴圹，张正林. 轻压下对220 mm×260 mm大方坯轴承钢内部质量的改善[J]. 炼钢, 2018, 34(6): 34-39.
[14]	翟晓毅，徐斌，孙彩凤，孙江波，冯忠贤，李海斌，高建. 10.9级高强螺栓面缩率不合格原因分析及改进 [J]. 炼钢, 2018, 34(6): 51-56.
[15]	张萌1，岳峰1，孙忠权2，曾令宇2,钟凡2，郭峻宇2. 电磁搅拌对42CrMo矩形坯宏观碳偏析的影响研究[J]. 炼钢, 2018, 34(5): 57-63.