钛及钛合金的新型多级深度热还原技术

A Novel Multi-stage Deep Thermal Reduction Technology for Titanium and Its Alloys

摘要:

提出了"多级深度热还原"的理念,即镁/铝热自蔓延-多级深度还原制备钛及钛合金技术,利用该技术成功制备出纯度为99.69%的高纯还原钛粉,氧含量<0.15%的Ti6Al4V合金粉;制备出20 kg级的Ti Al合金铸锭,其Ti/Al原子比为1∶1,氧含量为0. 09%。该研究成果已在山东淄博傅山企业集团推广应用,所建成的200 t/a钛粉生产线于2019年12月全线贯通投产。实践证明,该技术有效解决了传统金属热还原无法彻底还原TiO_2直接制备钛及钛合金的难题,可使钛材生产成本降低30%左右,为钛材低成本清洁制备与应用奠定了工业化基础。

Abstract:

The concept of 'multi-stage deep thermal reduction' was proposed,the technology of magnesium/aluminum thermal self-propagating high-temperature synthesis( SHS) multi-stage deep reduction to prepare titanium and its alloys.The high purity reduced titanium powder with purity of 99. 69%,Ti-6Al-4V powder with oxygen content less than 0. 15% and TiAl alloy ingot of 20 kg scale( the atomic ratio of Ti/Al was 1∶1) with oxygen content 0. 09% were successfully prepared with this technology. The achievements have been successfully transformed and applied in Shandong Fushan Group. The 200 t/a reduced titanium powder industrial demonstration line was successfully put into operation on December,2019. This technology solves the problem that traditional metallothermic reduction can not completely reduce TiO_2 to directly prepare titanium and its alloys,which can reduce the production cost of titanium by about 30%,and lay an industrial foundation for low-cost clean preparation and application of titanium materials.