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 ℃渗铜 3.5 h, 渗层厚度可达到200μm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。
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 3.5h alloying at 870℃, the thickness of the alloyed layer reaches to 200μm. The composition in the alloyed surface layer gradually changes in the depth direction of the substrate and the microstructure is substrate microstructure plus diffused Ti_2Cu intermetallic. Preliminary tests reveal that the copperizing alloyed layer has the function of burn-resistance.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2005年第1期110-115,共6页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(50271045)
关键词
阻燃钛合金
双层辉光离子渗金属技术
表面合金化
渗铜
burn-resistant titanium alloy
double glow plasma alloying technology
surface alloying
copperizing