长期以来,火电厂的制粉和除灰设备磨损严重,寿命较短,备品需要量很大。我部许多厂过去一直沿用ZG50Mn2制造这些易磨损备件。实践表明,这种选材是不尽合理的,备品寿命不仅与国外先进水平相差甚远,就是与国内先进水平相比,差距也很大(表1)由于寿命短,不仅加大了电厂的检修工作量。消耗了很多的金属更直接威胁着电厂的安全、经济运行。特别是当大量推广使用石煤,煤矸石和油母页岩后 For a long time, power plant dusting and ash removal equipment, serious wear and tear, short life expectancy, a great demand for spare parts. Many of our mills have historically used these ZG50Mn2 parts to make these wearable parts. Practice shows that this material selection is not reasonable. The life span of spare parts is not only far away from the advanced level in foreign countries, but also has a great gap compared with the domestic advanced level (Table 1). Because of its short life span, it not only increases the overhaul of power plants Workload. Consumed a lot of more direct threat to the power plant safety, economic operation. Especially when a large number of promoting the use of stone coal, gangue and oil shale after