(太原理工大学 表面工程研究所，太原 030024)
摘 要: 为解决整体阻燃钛合金存在的比强度低、加工性差及价格昂贵等问题， 利用双层辉光离子渗金属技术， 在Ti-6Al-4V的表面渗入Cu元素， 在其表面形成Ti-Cu阻燃合金层。 研究了温度、 保温时间、源极电压、 工件电压、 极间距等工艺参数对渗层显微组织、 成分及厚度的影响， 得出了适合的工艺参数。 870 °C渗铜 3.5 h， 渗层厚度可达到200 μm以上。 阻燃合金层的成分呈梯度分布， 显微组织为基体组织加弥散分布的Ti2Cu金属间化合物。初步阻燃实验证明， 渗Cu合金层起到了预期的阻燃效果。
关键字: 阻燃钛合金；双层辉光离子渗金属技术； 表面合金化； 渗铜
（ 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
