硼对60 mm厚Q690D钢淬透性和力学性能的影响

doi:10.13228/j.boyuan.issn0449-749x.20140345

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摘要通过端淬试验、[Z]向硬度测试、显微组织和力学性能分析，研究了硼对60 mm厚Q690D钢淬透性和力学性能的影响。试验结果表明：微量固溶硼可显著提高60 mm厚Q690D钢的淬透性；和无硼的试验钢相比，含硼试验钢板厚1/4处的淬火组织由马/贝复相变成板条马氏体，淬火、回火态横截面上[Z]向最大硬度差分别由9、 5HRC降低到4、3HRC，提高了[Z]向硬度的均匀性，同时含硼试验钢淬火、回火态的强度和韧性得到提高。

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	杨维宇

关键词 ： Boron, Q690D, hardenability, Z direction hardness, microstructure

Abstract：By jominy test， [Z] direction hardness test， microstructure and mechanical properties analysis，the effects of boron on hardenability and mechanical properties of 60 mm Q690D steel were studied. The results show that the trace solution boron can significantly improve the hardenability of 60 mm Q690D steel; compared with the experimental steel without boron addition，quenching microstructure of experimental steel with boron addition was transformed from martensite/bainite complex phases to lath martensite at thickness of 1/4， the maximum hardness difference of [Z] direction at transverse section for quenching was reduced from 9HRC to 4HRC and that for tempering was reduced from 5HRC to 3HRC， which made the homogeneity of hardness at [Z] direction improved， as well as the strength and toughness for quenching and tempering of experimental steel with boron.

收稿日期: 2014-06-06 出版日期: 2015-02-02

引用本文:

杨维宇，董瑞峰，高峰，李智丽. 硼对60 mm厚Q690D钢淬透性和力学性能的影响[J]. 钢铁, 2015, 50(2): 76-80. YANG Wei-yu，DONG Rui-feng， GAO Feng，LI Zhi-li. Effects of boron on hardenability and mechanical properties of 60 mm Q690D steel. Iron and Steel, 2015, 50(2): 76-80.

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