【摘要】 测量了放置1年(1 a)的BNbRE和BNb钢供货(即热轧)态重轨踏面区样品及其700℃,30 min,水冷(W.C.)室温变形样品的内耗.结果表明,两种钢的热轧态样品均有Snoek—Ke-Koster(SKK)峰,但内耗有较明显的差异:BNb钢轨的SKK峰明显高于、也宽于BNbRE钢的SKK峰,前者的峰温较后者约高20℃;但前者没有Snoek峰,后者则有该峰.两种钢变形样品的SKK峰大体相同.同时,测量了放置2年(2a)的两种钢轨的供货样品和变形样品的内耗,结果与放置1a的样品有明显不同.更多还原

【Abstract】 The internal friction of the specimens from the tread area of BNb and BNbRE rail steels were measured, which are laid over one year after heat rolling, and RT deformed after treatment at 700℃, 30 min , W.C. It is found that exist Snoek-Ke-Koster (SKK) peaks for the tested specimens, however, their patterns are difference: the peak of the BNb rail steel is higher and wider than that of the BNbRE steel rail, and the peak temperature of the former is about 20℃ higher than one of the latter; in addition, a Snoek peak exists in the latter, but no this peak in the former. The SKK peaks of the deformed specimens of both the steels are similar. The internal frictions of the specimens from rolling steel laid over two years and deformed rail were also measured, which shows obvious difference from that laid over one year.更多还原