求翻译：热处理后，同种碳含量合金的硬度都比铸态低，且组织变化不明显，但硬度发生变化，说明热处理后组织均匀化使其硬度都降低；同种碳含量合金的冲击韧性都比铸态高，更说明热处理后组织均匀化使硬度降低冲击韧性升高。是什么意思？

After heat treatment, the hardness of the alloy of the same carbon content than cast, and the organization did not change significantly, but the change in hardness, the hardness of the heat treatment even it decreased; than the cast of the same kind of impact toughness of the carbon content of alloy

After heat treatment, the concentration of the alloy same hardness is greater than normal low-cast, and that the Organization does not change significantly, but hardness changes after heat treatment organization, uniform hardness are all the same carbon is lower; impact toughness of the alloy than c

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After heat treatment, hardness of the alloy of the same carbon content lower than the cast, and organizational change is not obvious, but hardness changes indicate tissue homogenization reduce its hardness after heat treatment; impact toughness of the alloy of the same carbon content is higher than

After the heat treatment, homogeneous carbon content alloy degree of hardness is all lower than the cast condition, also the organization change is not obvious, but degree of hardness changes, after explained the heat treatment organizes the uniformization to cause its degree of hardness all to redu