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首页> 外文会议>Iron Steel Supplement 2005 vol.40: The Joint International Conference of HSLA Steels 2005 and ISUGS 2005 >Microstructure and Mechanical Properties of Fire-Resistant Steel
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Microstructure and Mechanical Properties of Fire-Resistant Steel

机译：耐火钢的组织和力学性能

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摘要

The microstructure and mechanical properties of fire-resistant (FR) steels were investigated through industrial trial-production. The effects of tempering temperature on microstructure were searched. At the same time, high-temperature strengthening mechanism of FR steels is discussed with the help of phase analysis. Multiphase microstructure of FR steels was basically consisted of polygonal ferrite, pearlite and granular bainite. The fine distribution of martensite-austenitic(M-A) was favorable to maintain significant high-temperature properties of FR steels for construction. At high-temperature, the stability of microstructure was essential to enhance high-temperature properties of FR steels. The Mo_2C precipitate at high-temperature was the most important factor to keep major strength in elevated temperature.
机译：通过工业试生产研究了耐火（FR）钢的组织和力学性能。研究了回火温度对显微组织的影响。同时，在相分析的基础上探讨了FR钢的高温强化机理。 FR钢的多相组织主要由多边形铁素体，珠光体和粒状贝氏体组成。马氏体-奥氏体（M-A）的精细分布有利于保持建筑用FR钢的显着高温性能。在高温下，显微组织的稳定性对于提高FR钢的高温性能至关重要。高温下Mo_2C的析出是保持高温强度的最重要因素。

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