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为改善高铬白口铸铁的韧性以扩大其应用范围,作者采用沈阳1~#和沈阳3~#变质剂,对其进行变质处理,使铸态碳化物呈团球状+板条状,并且细化了基体组织,改善了晶界状态.经热处理后的高铬白口铸铁,其冲击值稳定在8~15J/cm~2,小能量多次冲击值在1.7负荷条件下稳定在3万次以上,K_(1c)值稳定达到85kg/mm~(3/2)以上.应用该材质生产的风扇磨打击板其寿命为高锰钢打击板的3~4倍,球磨机衬板的寿命可提高达5~7倍.
In order to improve the toughness of high-chrome white cast iron and expand its application scope, the author modified the treatment of 1 ~ # and Shenyang 3 ~ # modifiers in Shenyang so that the as-cast carbides are spherical and lath-like The matrix structure is improved and the grain boundary state is improved.The impact value of the high chromium white cast iron after heat treatment is stabilized at 8-15J / cm 2, and the small energy multiple impact value is stabilized at 30,000 under the condition of 1.7 load Above, K_ (1c) value of stable reached 85kg / mm ~ (3/2) above. The use of the material production of fan mill impact board life of high manganese steel plate 3 to 4 times the life of the ball mill liner can be increased Up to 5 to 7 times.