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利用型内感应加热工艺铸造复合磨辊;针对磨辊高铬铸铁层在耐磨试验机上进行了磨料磨损试验;对不同形态的碳化物对基体的保护作用与碳化物的剥离进行了相关的分析。结果表明载荷在45N以下,磨损较为缓慢,当载荷超过45N时,磨损急剧加剧,这是由于在较大载荷的作用下碳化物开始脱离基体,使基体失去高硬度碳化物的保护和磨损机制的改变而造成的。高载荷增加到45N时,“尺寸较小”的碳化物首先剥离基体,载荷继续增大,“尺寸较大”的碳化物也剥离基体并有碎裂现象。这就要求磨辊高铬铸铁中的碳化物要分布均匀,尺寸也要合适。
The composite grinding roller was cast by induction induction heating process. Abrasive wear test was carried out on the wear-resistant test machine for the high-chromium cast iron layer of the grinding roller. The correlation between the protective effect of different forms of carbides on the substrate and the peeling of carbide was analyzed . The results show that the load is below 45N, the wear is relatively slow. When the load exceeds 45N, the wear rate increases sharply. This is because the carbide begins to detach from the matrix under the action of larger load and loses the protection and wear mechanism of the matrix with high hardness Change caused by. When the high load increases to 45N, the “smaller” carbides strip the matrix first, the loading continues to increase, and the “larger” carbides also peel off the matrix and fragment. This requires grinding roller high chromium cast iron in the carbide should be evenly distributed, the size should be appropriate.