成分梯度钢铁材料的研究
Study on Composition-graded Steel
陈 婷, 徐 光
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作者单位：(武汉科技大学 钢铁及资源利用省部共建教育部重点实验室, 湖北 武汉 430081)
中文关键字：成分梯度钢； 回火； 拉伸性能； 韧性断裂
英文关键字：composition-graded steel; tempering; tensile property; toughness fracture
中文摘要：利用气体和材料表面碳分子的不同活性，对一种含碳量为0.40%的中碳钢进行成分梯度处理，并对成分梯度处理后的试样进行不同温度下的回火处理，回火处理后的材料具有良好的强度和伸长率。拉伸断口形貌表明，材料的断裂为韧性断裂。采用的热处理成分梯度处理方法是一种制备成分梯度钢铁材料的新方法，这种方法也为马氏体钢的大压下加工提供了一个实用手段。
英文摘要：A steel with 0.40%C was processed using different activity of carbon molecules in processing gas and materials to achieve a graded composition in steel. The tempering treatment for composition-graded steel was carried out. The tensile test results show that the tempered steel has good comprehensive property. The fracture morphology indicates that the fracture is toughness fracture for all samples tempered at different temperature. The method to achieve composition-graded materials by heat treatment is an effective and new technique. This method is also a practical means to process martensite steels with large reduction.