Because of its excellent specific strength, corrosion resistance and high temperature properties, titanium alloys have been widely used in aerospace, medical, chemical and other fields. As an advanced plastic forming process, cold forging technology provides an efficient and economical way for the production of titanium alloy forgings. In this paper, the process and mechanical properties of cold forging of titanium alloy are deeply analyzed.
Cold forging process of titanium alloy
Material preparation
Selecting suitable titanium alloy blank is the primary task of cold forging process. The chemical composition, structure and mechanical properties of the billet shall meet the predetermined standards. Before cold forging, it is usually necessary to preheat the billet to improve its plasticity and reduce its deformation resistance.
Mold design and manufacturing
The design and manufacture of cold forging die is the key factor affecting the quality of forging. The shape, size and accuracy of the die directly determine the geometry and dimensional accuracy of the forging. The mold material should have high hardness, strength and wear resistance to ensure the integrity and life of the mold during cold forging.
Cold forging
In the process of cold forging, the blank is subjected to pressure in the die and plastic deformation occurs. Forming parameters such as pressure, speed, lubrication, etc. need to be precisely controlled to ensure the forming quality and performance of the forging. In addition, reasonable cold forging pass and process arrangement is also the key to improve production efficiency and reduce production costs.
Postprocessing
The forgings after cold forging usually require post-treatment procedures such as heat treatment, machining and inspection. Heat treatment can improve the mechanical properties and microstructure of forgings. Machining can further improve the dimensional accuracy and surface quality of forgings; The inspection can ensure that the quality of the forging meets the predetermined standards.
Mechanical properties analysis of titanium alloy cold forging parts
Strength and plasticity
Titanium alloy forgings processed by cold forging have high strength and plasticity. Due to the grain refinement of the material during cold forging, the strength and plasticity of the material are improved. In addition, cold forging can also eliminate some residual stresses and defects in the material, thereby further improving the mechanical properties of the material.
Toughness and corrosion resistance
Cold forging of titanium alloy has excellent toughness and corrosion resistance. Due to the crystal structure and chemical composition of titanium alloy itself, it has good toughness and corrosion resistance. At the same time, deformation and grain refinement during cold forging also help to improve the toughness and corrosion resistance of the material.
Fatigue and creep properties
Titanium alloy cold forging forging also has advantages in terms of fatigue and creep properties. The fatigue and creep properties of the materials are improved due to the grain refinement and the removal of residual stress during cold forging. This makes titanium alloy cold forging forgings have better service life and reliability in high temperature and high stress environments.
Through the in-depth analysis of the process and mechanical properties of titanium alloy cold forging, it can be found that cold forging technology provides an efficient and economical way for the production of titanium alloy forging. However, this technology also faces some challenges and problems, such as high difficulty in mold design and manufacturing, and complex control of forming process parameters. In order to solve these problems and challenges, it is necessary to further study and explore new process methods and technical means. For example, new mold materials and manufacturing techniques can be studied to improve mold life and reduce maintenance costs; New forming process parameter control technology and equipment can be developed to reduce forming difficulty and improve production efficiency. New titanium alloy materials and preparation technology can be explored to further improve the mechanical properties of materials and reduce costs. In short, through continuous research and innovation, titanium alloy cold forging technology can be promoted in a wider range of application fields.
