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首页> 外文会议>International Symposium on Nitrides; 20060403-05; Eskisehir(TK) >Characterization of Niobium Carbonitride Coating on AISI D2 Steel
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Characterization of Niobium Carbonitride Coating on AISI D2 Steel

机译：AISI D2钢上碳氮化铌涂层的特性

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摘要

Thermo-diffusion coatings containing Nitrogen, Carbon and Niobium (N+C+Nb) on AISI D2 steel have been carried out by an initial tufftriding process followed by saturation with Niobium. The properties of the diffusion layer, namely microstructure, phase composition and micro-hardness of the Niobium carbonitride layer, have been studied. The influence of treatment time of Niobizing on the thickness of the metallized layer and its phase composition has been studied. Nitriding treatment was performed at 575℃ for 2 h. Then, the Niobizing treatment was performed by pack method in the powder mixture consisting of ferro-Niobium, ammonium chloride and alumina at 1000℃ for 1-4 h. The phases formed on the Niobium carbonitride coated steel were NbN and NbC, confirmed by X-ray diffraction (XRD) analysis. The longer the treatment times, the thicker the Niobium carbonitride layer became. The thickness of Niobium carbonitride layer was changing between 6.53 μm and 17.45 μm, depending on treatment time and temperature. The microhardness of Niobium carbonitride layer formed on the AISI D2 steel was changing between 2132±203 and 2814±245 HV_(0.01) from surface to interior.
机译：AISI D2钢上的含氮，碳和铌（N + C + Nb）的热扩散涂层已通过最初的加脂工艺进行了处理，然后用铌饱和。研究了扩散层的性质，即碳氮化铌层的组织，相组成和显微硬度。研究了铌化处理时间对金属化层厚度及其相组成的影响。在575℃下进行氮化处理2 h。然后，在1000℃下通过填充法对由铌铁，氯化铵和氧化铝组成的粉末混合物进行铌化处理1-4小时。通过X射线衍射（XRD）分析确认，在碳氮化铌涂层钢上形成的相为NbN和NbC。处理时间越长，碳氮化铌层越厚。取决于处理时间和温度，碳氮化铌层的厚度在6.53μm和17.45μm之间变化。 AISI D2钢上形成的碳氮化铌层的显微硬度从表面到内部在2132±203和2814±245 HV_（0.01）之间变化。

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