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Surface Strengthening of Ti-6Al-4V Alloy by Glow Plasma Carbonization Process
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Surface Strengthening of Ti-6Al-4V Alloy by Glow Plasma Carbonization Process
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    摘要:

    利用輝光等離子滲碳技術(shù)對Ti-6Al-4V進(jìn)行了表面強(qiáng)化處理。等離子氣體為氬氣，滲碳溫度和時間分別為950 ℃和3 h，工作壓力為30~35 Pa。為了避免傳統(tǒng)氣體滲碳過程中易于產(chǎn)生氫脆的現(xiàn)象，用固體石墨棒作為碳源。滲碳結(jié)束后，分別利用OM、FESEM和XRD對滲碳層做分析，并在壞-塊摩擦磨損試驗機(jī)上對處理和未處理樣品進(jìn)行摩擦磨損對比實驗。結(jié)果發(fā)現(xiàn)，滲碳層深度約為416 μm，其表面碳化物（TiC和V8C7）提高了合金表面的硬度和耐磨性能。

    Abstract:

    A glow plasma carburizing technique was applied to strengthen the surface of the Ti-6Al-4V alloy. The alloy was carburized at 950 oC and 30~35 Pa for 3 h using plasma of Ar gas. Graphite rod was employed as carbon supply to avoid the hydrogen brittleness which is common in traditional gas carbonization. The carburized layer was examined by an optical microscope (OM), field emission scanning electron microscope (FESEM), and X-ray diffractometer (XRD). The wear resistance under ring-block wear testing and the surface hardness were evaluated and compared to those for the untreated material. Results show that a carburized layer (416 μm thick), mainly composed of TiC and V8C7, is found. These hard carbides contributed to the imrovement of the hardness and wear resistance.

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邢亞哲,姜超平,郝建民. Surface Strengthening of Ti-6Al-4V Alloy by Glow Plasma Carbonization Process[J].稀有金屬材料與工程,2013,42(6):1101~1104.[Xing Yazhe, Jiang Chaoping, Hao Jianmin. Surface Strengthening of Ti-6Al-4V Alloy by Glow Plasma Carbonization Process[J]. Rare Metal Materials and Engineering,2013,42(6):1101~1104.]
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  • 收稿日期:2012-06-25
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