提高产品检验质量是保证铁路运输安全的一个重要措施。无损探伤技术是目前工业产品质量检验的主要手段之一,而磁粉探伤检验又是铁路机车车辆零部件探伤的主要方法。探伤磁粉的性能及成分直接影响到检测结果。根据路用探伤磁粉性能暂行技术条件,要求采用低碳钢的氧化物作为生产磁粉的原材料。若探伤磁粉中含碳量过高,则其矫顽力大,流动性差,所以路用探伤磁粉性能暂行技 Improving the quality of product inspection is an important measure to ensure the safety of railway transportation. Non-destructive testing is one of the main means of quality inspection of industrial products, and magnetic particle inspection is the main method of testing the parts of railway rolling stock. Magnetic particle testing performance and composition of a direct impact on test results. According to the road testing of magnetic properties of interim technical conditions require the use of low-carbon steel oxide as the raw material for the production of magnetic powder. If the testing of carbon content in the magnetic powder is too high, then its coercive force, poor mobility, so the road with magnetic permeability testing Interim Technology