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Hot die forging forming method for titanium material cartridge shape cover

A technology of medicine type cover and hot mold, applied in metal processing equipment and other directions, can solve the problems of difficult one-time forming, poor fluidity, large deformation, etc., and achieve the effect of being beneficial to forging, avoiding grain growth and dense organization.

Inactive Publication Date: 2017-05-31
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for the preparation of thin-walled titanium drug-type covers by hot die forging, there are still the following problems: the temperature range of titanium and titanium alloy hot-die forging is narrow, the fluidity is poor, and it is easy to stick to the mold; the wall of the drug-type cover is thin, The amount of deformation is large, it is difficult to form at one time

Method used

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  • Hot die forging forming method for titanium material cartridge shape cover
  • Hot die forging forming method for titanium material cartridge shape cover

Examples

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Effect test

Embodiment 1

[0016] A hot die forging forming method for a titanium drug-type cover, comprising the following steps: ①Insulate the columnar blank at 890°C for 1 hour and apply a lubricant, and then put it into the preheated (650°C) prefabricated blank that has been applied with the lubricant. In the mold, the columnar blank pier is roughly formed into a preform on a hydraulic press; ②The preform is taken out of the prefabrication mold and placed in a preheated (650°C) final forging die that has been coated with lubricant, and forged on a hydraulic press to form a preform. Forgings of drug-masks; ③ Annealing treatment of forgings of drug-masks at 600°C for 0.5h. The grain size of the forging is 7, the elongation A(%)=29.5%, and the reduction of area Z(%)=70%.

Embodiment 2

[0018] A hot die forging forming method for a titanium drug-type cover, comprising the following steps: ①Insulate a columnar blank at 950°C for 1.5 hours and apply a lubricant, then put it into a preheated (750°C) mold that has been applied with a lubricant In the prefabricated mold, the columnar blank pier is roughly formed into a preform on a hydraulic press; ②The preform is taken out of the prefabricated mold and placed in a preheated (750°C) final forging die that has been coated with lubricant, and forged on a hydraulic press It becomes a drug-shape forging; ③The drug-shape forging is annealed at 500°C for 1h. The grain size of the forging is 6.5, the elongation A(%)=26.5%, and the reduction of area Z(%)=64%.

Embodiment 3

[0020] A hot die forging forming method for a titanium drug-type cover, comprising the following steps: ①Insulate the columnar blank at 850°C for 1 hour and apply a lubricant, then put it into the preheated (700°C) prefabricated blank that has been applied with the lubricant In the mold, the columnar billet pier is roughly formed into a preform on a hydraulic press; ②The preform is taken out of the prefabrication mold and placed in a preheated (700°C) final forging die that has been coated with lubricant, and forged on a hydraulic press to become Forgings of drug-masks; ③ Annealing treatment of forgings of drug-masks at 550°C for 0.5h. The grain size of the forging is 7, the elongation A(%)=28%, and the reduction of area Z(%)=69%.

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Abstract

The invention belongs to a hot die forging forming method for a titanium material cartridge shape cover. The method includes the following steps that firstly, a column-shaped blank material is subjected to heat preservation for 1-2 h at 850-950 DEG C, and is placed into a preheated prefabricated mold, and the column-shaped blank material is subjected to heading forming on a hydraulic machine to form a prefabricated blank; secondly, the prefabricated blank is taken out of the prefabricated mold and placed into a preheated final forging die, and is forged on the hydraulic machine into a cartridge shape cover forged piece; and thirdly, the cartridge shape cover forged piece is subjected to annealing treatment for 0.25-1.25 h under 500-700 DEG C. The grain size of the forged piece is larger than 6.5, the elongation percentage A (%) is larger than 26%, and the percentage reduction of area Z (%) is larger than 60%.

Description

technical field [0001] The invention belongs to the technical field of drug-shape processing, and in particular relates to a hot die forging forming method for a titanium drug-shape. Background technique [0002] The drug-shaped shield is the main element that forms the jet or projectile. Among the various factors that determine the penetration performance of the hollow charge warhead, the material of the drug cover plays a key role. At present, pure copper is a widely used material for common drug-type covers and explosive-molded projectile drug-type covers. In order to adapt to the development of high-penetrating performance warheads and further improve the destructive power of the shaped charge structure on the concrete medium, higher requirements are put forward for the opening aperture under the condition of being able to penetrate the limited thick target. Studies have shown that not only the geometric size, precision and surface quality of the cover have an impact o...

Claims

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Application Information

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IPC IPC(8): B21J5/02B21J5/08C21D1/26
CPCB21J5/025B21J5/08C21D1/26
Inventor 吴立鸿何瑞良徐国强朱世杰
Owner ZHENGZHOU UNIV
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