| 厚规格船板钢拉伸断口分层的原因分析 |
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| 引用本文： | 卢忠良,王晶,张婷,刘品,姜鸿亮.厚规格船板钢拉伸断口分层的原因分析[J].山东冶金,2011,33(2):49-51. |
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| 作者姓名： | 卢忠良 王晶 张婷 刘品 姜鸿亮 |
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| 作者单位： | 莱芜钢铁集团有限公司品质保证部,山东莱芜,271104 |
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| 摘 要： | 针对莱钢厚规格船板钢DH36拉伸试样表面出现麻点、裂纹,拉伸断口分层,断后伸长率低的问题,利用低倍、金相及扫描电镜等分析手段,对问题试样的显微组织及断口情况进行分析。结果表明,钢板中心部位碳和合金元素偏析及夹杂物在晶界处析出导致的带状组织、魏氏组织及微裂纹是断口分层的主要原因。制定合适的加热温度,减小成分偏析,抑制心部魏氏组织,可减缓这种分层现象。
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| 关 键 词： | 船板钢 拉伸断口 分层 偏析 魏氏组织 |
Reason Analysis of Tensile Fracture Demixing of Thick Gauge Ship Plate |
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| LU Zhong-liang,WANG Jing,ZHANG Ting,LIU Pin,JIANG Hong-liang.Reason Analysis of Tensile Fracture Demixing of Thick Gauge Ship Plate[J].Shandong Metallurgy,2011,33(2):49-51. |
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| Authors: | LU Zhong-liang WANG Jing ZHANG Ting LIU Pin JIANG Hong-liang |
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| Affiliation: | (The Quality Department of Laiwu Iron and Steel Group Corporation,Laiwu 271104,China) |
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| Abstract: | Because pockmarks and cracks appeared in the tensile simple of thick gauge ship plate DH36 produced by Laiwu Steel,demixing phenomena appeared in the fracture and the percentage elongation after fracture was low,the microscopic structure and the fractography were analyzed by means of macro check,metallographic and SEM.The results showed that it is main reasons of the fracture demixing that banded structure,Widmanstatten structure and fine cracks resulted in the segregation of carbon and alloy elements and the grain boundary precipitation of inclusion.Reducing composition segregation and restraining Widmanstatten structure in the center by appropriate heat temperature can cut levels of this demixing. |
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| Keywords: | ship plate steel tensile fracture demixing segregation widmanstatten structure |
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