The invention refers to a preparation method of titanium plate for deep drawing. Sponge titanium with O content ≤0.05%, N content ≤0.006% and Fe content ≤0.05% is used as raw material, which is smelted, cast and forged, and drawn and/or upset at least twice in the forging process, so as to prepare slabs with good microstructure and slight texture. After hot rolling, cold rolling, reverse rolling combined with annealing and subsequent treatment, pure titanium plates with suitable grain, qualified properties and high cup process value were obtained. This method can make the production process of pure titanium sheet shorter, higher efficiency and good deep drawing performance.
Titanium is the only metal that has an affinity to the human body among all metals. It has no harm to the human body and will not produce rejection reaction when combined with the human body. Titanium has many excellent properties, such as low density, high specific strength and corrosion resistance, titanium made of daily necessities have the advantages of light and firm, no rust, non-toxic and harmless, antibacterial and non-allergic, so it has a broad application prospect in the field of daily necessities.
Compared with other machining methods, stamping products have the advantages of stable quality, good interchangeability, direct use, low energy consumption and high production efficiency. Titanium is a kind of metal that is difficult to be stamped. The application of titanium sheet stamping parts is relatively few. The stamping technology of titanium sheet needs to be developed and improved, and the production process of titanium sheet for stamping is also less studied. Stamping titanium plate requires good process performance, that is, good stamping performance, to ensure that there is enough plasticity, no crack, because of the high strength ratio of titanium, plastic deformation zone is small, is not conducive to deep drawing forming. Titanium is a densely packed hexagonal structure, plasticity is far less than steel, aluminum and copper and other metals, stamping performance is relatively poor, titanium has obvious anisotropy, its formability is greatly affected by anisotropy.
There are many factors affecting the formability of titanium plate stamping, including the composition of titanium material, mechanical properties, technological properties and organization, external factors and die, stamping process parameters and lubricants, etc., need to be measured by comprehensive indicators. The mechanical properties include strength, flexure ratio, plasticity, strain ratio and hardening index. The process properties include cold bending, bending rebound, stamping limit and stamping performance.
