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发电车间与K型锅炉配套的锤击式磨煤机及与20吨锅炉配套的φ1000mm风扇式磨煤机中的易磨损件是鎯头、衬瓦和冲击板。过去鎯头采用普通白口铸铁,衬瓦和冲击板采用高锰钢。由于磨煤过程中并无使高锰钢获得加工硬化的工况条件,所以高锰钢寿命并不长。普通白口铸铁鎯头在使用煤渣的情况下也相形见拙。为了提高易损件的抗磨性,节约材质,提高工效,减少维修工时,我们尝试寻找更能适应此种磨损条件的新材质。为此,我们将衬瓦改用Cr4合金白口铸铁,寿命提高了约20～30%。但仍不理想,遂对国外牌号的Cr15Mo3合金铸铁进行试验,国外对此牌号采用电炉熔炼,基于本厂的实际情况.采用冲天炉熔炼Cr15Mo3的尝试.仅对现有的初步结果做一总结,供同行参考。
Power plant and K-type boiler supporting the hammer mill and 20 tons of boilers supporting φ1000mm fan mill in the wear parts is the head, lining tile and impact board. In the past, the use of ordinary white cast iron head, lining tile and impact board with high manganese steel. Due to the grinding process does not make the high manganese steel work hardening conditions, so high manganese steel life is not long. Ordinary white cast iron head in the use of cinder cases also see each other clumsy. In order to improve the wear resistance of wearing parts, save material, improve work efficiency, reduce maintenance man-hours, we try to find new materials that can better meet the wear conditions. To this end, we will switch tiles with Cr4 alloy white cast iron, life expectancy increased by about 20 to 30%. But still not ideal, then the foreign brands of Cr15Mo3 alloy cast iron for testing, the foreign brands of electric smelting, based on the actual situation of the factory. The use of cupola smelting Cr15Mo3 attempt only to the existing preliminary results to make a summary, For peer reference.