采用超快冷工艺提高高强超厚H型钢强韧性的研究与应用

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摘 要：采用超快冷工艺生产厚规格高强度H型钢，翼缘表面产生粒状或板条状贝氏体，使相变强化在H型钢中起着非常重要的作用，心部位置的晶粒更细小，同时带状组织的级别有效降低，有效提高H型钢的强度和韧性。

关键词：超快冷工艺；贝氏体；相变强化

RESEARCH AND APPLICATION OF TMCP TO IMPROVE THE STRENGTH AND TOUGHNESS OF HIGH STRENGTH AND SUPER THICK H-SHAPED STEEL

Wei Zhenzhou    Liu Chunying    Zhang Nianhua    Wang Hailong

（Rizhao Steel Co.， Ltd.    Rizhao    276806，China）

Abstract：The TMCP is used to produce thick high-strength H-beam steel. Granular or strip bainite is produced on the flange surface， so that phase transformation strengthening plays a very important role in H-beam steel. The grain at the core is smaller， and the grade of ribbon structure is effectively reduced， which effectively improves the strength and toughness of H-beam steel.

Key words： TMCP；bainite；phase transformation strengthening

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高强度厚规格H型钢典型牌号为英标打桩钢S460J0，规格尺寸H337.9 mm×325.7 mm×30.3 mm×30.4 mm，主要用于香港市场房屋建筑体系。（剩余3269字）