锻压技术

建筑用热轧耐候钢组织和性能研究

英文标题：Study on structure and properties of hot rolling weathering steel used in building

作者：任非

单位：三门峡职业技术学院

关键词：热轧耐候钢 P含量

分类号：

出版年,卷(期):页码：2016,41(1):142-145

摘要：

采用金相显微镜、扫描电镜、万能试验机、冲击试验等研究方法，对热轧后建筑耐候钢进行了组织和性能的研究，探讨P含量对耐候钢组织和性能的影响。结果表明，热轧耐候钢中P具有细化晶粒尺寸的作用，耐候钢晶粒尺寸随着P含量增加先减小后增加；耐候钢屈服强度和抗拉强度随着P含量增加先增加后减小，P含量为0.100%时，两个强度分别达到最大值573.2和734.4 MPa；耐候钢20 ℃纵向冲击功随着P含量增加先减小后增加，P含量0.100%时，耐候钢冲击断口解理单元尺寸急剧增大，断口韧窝大量减少，耐候钢冲击性能达到最低值为105 J。

The structure and properties of hot rolling weathering steel were researched by metallographic microscope, scanning electron microscope, universal tester and impact toughness, and the influence of P content on the microstructure and properties of weathering steel was investigated. The results show that P existing in hot rolling weathering steel can refine the grain size of weathering steel. With the increase of P content, the grain size of weathering steel decreases first and then increases. With the increase of P content, the yield strength and tensile strength of weathering steel increase firstly and then decrease, and the maxmimum values are 573.2 and 734.4 MPa respectively with P content 0.100%. The impact performance of the weathering steel at 20 ℃ decreases firstly and then increases with the increase of P content. When the P content is 0.100%, the weathering steel impact fracture unit size increases rapidly, and the dimples decrease, and the impact property of weathering steel reaches the minimum 105 J.

基金项目：

河南省高等学校“专业综合改革试点”项目（豫教高〔2015〕33号）

任非（1980-），男，硕士，讲师

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