BNb与BNbRE钢轨踏面区的内耗

测量了BNb钢和BNbRE钢重轨踏面区使用(热轧)态及其700℃、30min WC、室温变形态试样的内耗。发现,两种钢轨热轧态试样都有Snoek—Kê—Kster(SKK)峰;但这两种钢热轧态样品的内耗,有较明显的差异:未加稀土的BNb钢轨的SKK峰明显地大于加丁稀土的BNbRE钢轨的峰,前者的峰温度也较后者高约20℃;但后者有可测的Snoek峰,而前者则没有此峰。两种钢变形态样品的SKK峰大致相同。对结果做了讨论。

Internal Friction in the Area Nearing Tread for the Rail Steels BNb and BNbRE

The internal friction in the specimens nearing the tread of commearcial rail and in the same one which were water cooled after held at 700C for 30min and then deformed for the steels BNb and BNbRE have been measured. It is found that there are all Snoek - Ke - Koster (SKK ) peak in the specimens of the two commercial rails, however,exist obvious difference of the peak patterns for two steels: the peak of the BNb rail steel without rare earth is distinctly higher and more wide than that of the BNbRE steel rail with rare earth,and the peak temperature of the former is about 20C higher than one of the latter too;in addition,there exists Snoek peak in the latter,but there is not this peak in the former. There is roughly the same SKK peak in the deformed pecimens of two steels . The discu-sion to the results was made.