铁路车辆使用的铅基轴承白合金,经过多次加热熔化,易产生烧损、氧化。为了保证旧白合金再用时符合成分比例要求,应坚持每锅旧白合金都要进行化验,发现其成分不符合标准时,应进行调整。但在现场调整成分时,往往没有什么根据,随便增加。所以,不是加多,就是加少,反复多次。既影 Lead-based bearings used in railway vehicles white metal, after repeated heating and melting, easy to produce burning, oxidation. In order to ensure the reuse of old white metal in line with the requirements of the proportion of ingredients, should adhere to each pot of old white metal to be tested and found that the composition does not meet the standards, it should be adjusted. However, when adjusting the composition on the spot, there is often no basis for arbitrarily increasing. Therefore, it is not more, less and less repeated. Both video