本文關(guān)鍵詞： 融滲法 高壓 低鈷粗晶 液相鈷 碳化鎢骨架　出處：《高壓物理學(xué)報(bào)》2017年01期 　論文類型：期刊論文

【摘要】：用含鈷量為16%(質(zhì)量分?jǐn)?shù))的硬質(zhì)合金YG16作為基體提供鈷源,對(duì)平均粒度為8μm的WC初始材料進(jìn)行氫氣還原脫氧處理,以減少合成樣品中的雜質(zhì),通過高壓融滲法燒結(jié)低鈷粗晶硬質(zhì)合金。重點(diǎn)研究了燒結(jié)壓力、溫度和燒結(jié)時(shí)間等條件對(duì)燒結(jié)體性能的影響,通過控制適當(dāng)?shù)墓に嚄l件得到高硬度值的低鈷粗晶合金,并對(duì)合成的硬質(zhì)合金層進(jìn)行X射線衍射(XRD)、掃描電鏡(SEM)及硬度檢測(cè)。實(shí)驗(yàn)結(jié)果表明,在4.5GPa、1 400℃、40min下合成樣品的碳化鎢晶粒形貌呈現(xiàn)球形或橢球形,其硬度值可達(dá)17.4GPa,表面鈷含量為5.7%。
[Abstract]:In order to reduce the impurity in the synthesized samples, a cemented carbide (YG16) with cobalt content of 16 (mass fraction) was used as the base to provide cobalt source, and the initial WC material with an average particle size of 8 渭 m was treated by hydrogen reduction deoxidation in order to reduce the impurity in the synthesized samples. The effects of sintering pressure, temperature and sintering time on the properties of low cobalt coarse crystal cemented carbides were studied by means of high pressure thawing method. The low cobalt coarse crystal alloys with high hardness were obtained by controlling the proper process conditions. X-ray diffraction (XRD), scanning electron microscopy (SEM) and hardness test were carried out on the cemented carbide layer. The results showed that the morphology of tungsten carbide grain was spherical or ellipsoid at 4.5 GPa1 400 鈩，

本文編號(hào)：1494516