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对高碳中锰耐磨钢的铸态、１０５０℃×１ｈ水淬及再加３５０℃×４ｈ回火的组织及力学性能进行了研究。随碳（１．５８～２．２０％）量增加或锰（４．２７～６．２９％）量降低，铸态及热处理后的韧性下降而硬度升高。在合碳２．１～２．２％时，加工硬化能力较差。随铬（０．２７～３．０２％）量增加，铸态韧性增加，硬度降低，而１０５０℃×１ｈ水淬后的性能则相反，但铬达３．０４％时加工硬化能力变小。稀土变质处理可降低铸态韧性，增加硬度，同时提高热处理后的韧性及硬度。铬和稀土可减少或消除铸态针状碳化物，但却增加铸态晶间碳化物。
The microstructure and mechanical properties of as-cast high carbon medium manganese wear resistant steel, water quenching at 1050 ℃ × 1h and tempering at 350 ℃ × 4h were studied. With the amount of carbon (1.58 ~ 2.20%) increased or the amount of manganese (4.27 ~ 6.29%) decreased, the toughness after as-cast and heat treatment decreased while the hardness increased. In the co-carbon 2.1 ~ 2.2%, poor work hardening. With the increase of chromium (0.27 ~ 3.02%), the as-cast toughness increases and the hardness decreases, while the performance after 1050 ℃ × 1h water quenching is the opposite, but the work hardening ability becomes smaller when the chromium reaches 3.04%. Rare earth modification can reduce the as-cast toughness, increase hardness, while improving the toughness and hardness after heat treatment. Chromium and rare earth can reduce or eliminate as-cast acicular carbides, but increase as-cast intergranular carbides.