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对H1 3钢的CDC处理进行了研究 ,用金相显微镜及扫描电子显微镜分析了渗碳层的组织形貌 ,用X射线衍射分析了碳化物的组成。确定了H1 3钢在 95 0℃CDC处理的最佳碳势为w [C]=1 2 % ;可获得经水淬后的渗层组织为马氏体基体上弥散分布的碳化物 ,主要碳化物是颗粒平均尺寸为 2 5 0nm的Cr7C3,渗层厚度达到 5 5 0 μm ,最高硬度达到 1 2 5 0Hm .与氮化处理的H1 3钢模具做了耐磨性比较 ,其耐磨性能优于氮化处理
The treatment of H1C steel by CDC was studied. The microstructure of carburized layer was analyzed by metallographic microscope and scanning electron microscope. The composition of carbides was analyzed by X-ray diffraction. The optimal carbon potential of H1 3 steel at 95 0 ℃ CDC was determined to be w [C] = 12%. It was found that the infiltrated microstructure of the infiltrated layer after quenching was martensite matrix and the main carbonization The average grain size of Cr7C3 is 250 nm, the thickness of the layer is 550 μm and the maximum hardness is 125 000. Compared with the H1 3 steel with nitriding treatment, its wear resistance is better Nitriding treatment