论文部分内容阅读
车轴钢经正火处理,在机械性能和晶粒度合格的条件下,逐根铣头后进行超声波探伤。目前,一次超探合格率较低,严重浪费能源和影响任务的完成。一次超探合格率低的因素是多方面的,有待深入分析。但从超探透声性不良与晶粒粗大、金相组织不均直接有关一点来看,可以认为主要与正火处理因素有关。为使工艺人员和生产工人正确掌握车轴钢的正火工艺和了解正火温度、保温时间与
Axle steel is normalized, mechanical properties and grain size qualified conditions, the root by milling head after ultrasonic flaw detection. At present, the passing rate of a super-exploration is relatively low, seriously wasting energy and affecting the completion of the task. There are many factors that lead to the low passing rate of a super-exploration, which needs further analysis. However, poor sounding and ultra-sounding coarse grains, uneven microstructure directly related point of view, can be considered mainly related to normalizing elements. In order to make craft workers and production workers correctly master the normalizing process of axle steel and know the normalizing temperature, holding time and