作者简介:夏云峰(1985－)，男，本科，高级工程师;E-mail:haiwen0602@126．com;收稿日期:2022-10-08DOI:10．20057/j．1003-8620．2022-00127WB36厚壁无缝钢管低倍组织气泡分析及工艺研究夏云峰，周仲成，胡永平，林雨(内蒙古北方重工业集团有限公司特钢事业部，包头014033)摘要:采用扫描电镜、磁粉和超声探伤以及性能测试等方式对WB36厚壁无缝钢管低倍“气泡”形成的原因和实际影响进行了分析研究。结果表明:低倍组织气泡产生的原因主要有脱氧不良、浇注温度高、钢包和耐火材料受潮等，气泡在宏观下呈短线状暗色条纹，微观下为圆形或椭圆形孔洞，主要分布于对应钢锭头部接近冒口端部的钢管近内壁至1/2壁厚处。轻微的气泡采用磁粉、渗透、超声波探伤均无法检出，对钢管的室温力学性能影响较小。WB36钢浇注温度控制在1590℃以下，保证VD精炼67Pa保持时间不少于15min、发热剂和保温材料水分含量小于0．1%能够有效防止低倍组织气泡缺陷产生。关键词:WB36无缝钢管;低倍组织;气泡;性能BubbleAnalysisofMacrostructureofWB36ThickWallSeamlessSteelPipeandProcessＲesearchXiaYunfeng，ZhouZhongcheng，HuYongping，LinYu(Specialsteeldivision，InnerMongoliaNorthHeavyIndustryGroupCo．，Ltd．，Baotou014033)Abstract:Thecausesandpracticaleffectsofmacrostructure“bubbles”inWB36thickwallseamlesssteelpipeareana-lyzedandstudiedbymeansofscanningelectronmicroscope，magneticparticleandultrasonicflawdetectionandperform-ancetest．Theresultsshowthatthemainreasonsfortheformationofmacrostructurebubblesarepoordeoxidation，highpouringtemperature，anddampofladleandrefractorymaterialsetc，thebubblesareshortlineardarkstripesatthemacro，andcircularorellipticalholesinthemicro，itismainlydistributedneartheinnerwallto1/2wallthicknessofthesteelpipecorrespondingtoingotheadnearhottop．Slightbubblescannotbedetectedbymagneticparticle，penetrationandul-trasonicflawdetection，whichhaslittleimpactonthemechanicalpropertiesofthesteelpipeatroomtemperature．WithcontrollingcastingtemperatureofWB36steelbelow1590℃，holdingtimeofVDrefiningat67Pashouldnotbelessthan15min，andmoisturecontentofheatingagentandthermalinsulationmateriallessthan0．1%，thegenerationofmacro-structurebubbledefectscanbeeffe...
