The results show that the carbon content and carbusintering temperature are the main parameters that influence the formation of gradient structure.

结果表明：在本实验条件下，初始碳含量与渗碳温度是影响梯度结构的主要参数；

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GDS testing results indicate the carbon content of the surface reaches 29.8%, the carbon content in the alloyed layer emerges in gradient distribution too.

辉光放电光电子谱仪（GDS）渗层成分检测结果表明表面含碳量可达29.8%，合金渗层的碳含量也呈梯度分布；

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The higher the carbon content is, the more apparent and the thicker the gradient structure are;

在其它条件相同的情况下， 初始碳含量越高， 梯度结构越明显， 厚度越大；

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