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对含微量合金元素V和Mo的新型建筑耐火耐候钢进行了不同温度和时间的热处理,并进行了高温力学性能和耐腐蚀性能的测试与分析。结果表明:随热处理温度从525℃提高至625℃或热处理时间从25 min延长至40min,600℃抗拉强度和屈服强度均先增大后减小,断后伸长率先减小后基本不变,240 h盐雾腐蚀的质量损失率前期减小。新型建筑耐火耐候钢的热处理温度和热处理时间分别优选为575℃和35 min。
The new construction fire-resistant and weathering steels containing trace amounts of alloying elements V and Mo were heat-treated at different temperatures and times, and the mechanical properties and corrosion resistance were tested and analyzed. The results show that with the increase of heat treatment temperature from 525 ℃ to 625 ℃ or the heat treatment time from 25 min to 40 min, the tensile strength and yield strength first increase and then decrease at 600 ℃, while the elongation at break decreases first and then remains basically unchanged, The mass loss rate of salt spray corrosion decreased in 240 h. Heat treatment temperature and heat treatment time of new building fire-resistant weathering steel are preferably 575 ℃ and 35 min respectively.