磨煤机加载拉杆失效分析
Heat Treatment(2014)
Abstract
采用化学成分分析、硬度测试、光学显微镜、扫描电镜等手段对断裂的辊式磨煤机加载拉杆进行了检测。结果表明,加载拉杆的断裂为弯曲疲劳断裂。拉杆经调质处理后进行大深度的机加工降低了表面材料的强度,表面尖而深的车加工沟痕引起局部的强烈应力集中,使拉杆的承载能力大大下降,是造成拉杆疲劳断裂的主要原因。
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