The characteristics of complete and partial decarburizations in spring steel 60Si2MnA were systematically investigated,including the microstructure,the hardness gradient,and the formation mechanism.The relation between decarburized types and heating temperature of the steel was comprehensively discussed.It is found that heating temperature has an important influence on the decarburized types.With the rise of heating temperature,the decarburized types change from no decarburization to complete decarburization,complete and partial decarburizations,partial decarburization,and no decarburization. The characteristics of complete and partial decarburizations in spring steel 60Si2MnA were systematically investigated, including the microstructure, the hardness gradient, and the formation mechanism. The relation between decarburized types and heating temperature of the steel was comprehensively discussed. It is found that the heating temperature has an important influence on the decarburized types. What the rise of heating temperature, the decarburized types change from no decarburization to complete decarburization, complete and partial decarburizations, partial decarburization, and no decarburization.