Recently, HTKJ Titanium Alloy Technology Group's first near-net shape titanium alloy full-size shell hydraulic blasting test was successful. The blasting strength has been increased by more than 10% compared with the original thick pipe machine + assembly welding scheme, which fully meets the design performance improvement requirements. The success of the near-net shape titanium alloy shell hydraulic pressure has further expanded the metal shell forming scheme, and also laid the foundation for improving the performance of the model products and subsequent batch production.
In order to achieve a high quality ratio of aero engines, in recent years, thin-walled titanium alloy shells have become an important design option. However, there are two major problems in this scheme: one is low raw material utilization rate, low machining efficiency, and long processing cycle; second, product safety margin is small, welding of external components of thin-walled shells is difficult, and welding quality directly restricts the pressure-bearing capacity of the shell . To this end, the basic research on applied materials was strengthened, and the near-net forming technology was adopted to realize the integration of raw material blank refinement and external component forming, so that the problems in the design of thin-walled titanium alloy shells were effectively solved.
Compared with the original plan, this plan uses near-net-shape technology to achieve a 40% reduction in the weight of raw material blanks and a 30% reduction in blank turning hours under the requirement that the total cost is basically unchanged. This greatly improves production efficiency and production efficiency.