(太原理工大學(xué) 表面工程研究所，太原 030024)
摘 要: 為解決整體阻燃鈦合金存在的比強(qiáng)度低、加工性差及價(jià)格昂貴等問(wèn)題， 利用雙層輝光離子滲金屬技術(shù)， 在Ti-6Al-4V的表面滲入Cu元素， 在其表面形成Ti-Cu阻燃合金層。 研究了溫度、 保溫時(shí)間、源極電壓、 工件電壓、 極間距等工藝參數(shù)對(duì)滲層顯微組織、 成分及厚度的影響， 得出了適合的工藝參數(shù)。 870 °C滲銅 3.5 h， 滲層厚度可達(dá)到200 μm以上。 阻燃合金層的成分呈梯度分布， 顯微組織為基體組織加彌散分布的Ti2Cu金屬間化合物。初步阻燃實(shí)驗(yàn)證明， 滲Cu合金層起到了預(yù)期的阻燃效果。
關(guān)鍵字: 阻燃鈦合金；雙層輝光離子滲金屬技術(shù)； 表面合金化； 滲銅
（ Research Institute of Surface Engineering,
Taiyuan University of Technology, Taiyuan 030024, China）
Abstract: To avoid the shortages of body burn-resistant titanium alloy like lower ratio strength, poor work process property and expensive cost, Cu element was introduced into the Ti-6Al-4V substrate by using double glow plasma surface alloying technology and the burn-resistant alloyed layer was formed on the surface. The effects of source electrode voltage, cathode voltage, temperature, gas pressure, distance between two cathodes, duration on composition and case depth were studied. The best technological parameters were got. After 3.5 h alloying at 870 °C, the thickness of the alloyed layer reaches to 200 μm. The composition in the alloyed surface layer gradually changes in the depth direction of the substrate and the microstructure is substrate microstructure plus diffused Ti2Cu intermetallic. Preliminary tests reveal that the copperizing alloyed layer has the function of burn-resistance.
Key words: burn-resistant titanium alloy; double glow plasma alloying technology; surface alloying; copperizing
