Microstructure refinement and equiaxed crystal transformation method for laser fuse additive manufacturing of titanium alloy components

Abstract

The invention provides a method for microstructure refinement and equiaxed grain transformation of titanium alloy components manufactured by laser fuse additive manufacturing, which specifically includes the following steps: coupling an ultrasonic impact micro-forging device with a laser fuse additive manufacturing device, and adopting laser fuse additive manufacturing Synchronous compound manufacturing is carried out in a composite way in which the material manufacturing device is in front and the ultrasonic impact micro forging device is in the back; the path is reasonably planned according to the shape of the workpiece and the parameters of the relevant ultrasonic impact micro forging device and laser fuse additive manufacturing system are set to achieve effective compatibility. , to control its composite manufacturing process; according to the path planning and system parameters, the ultrasonic impact micro-forging process is carried out layer by layer in the laser fuse process synchronously until the additive manufacturing process of titanium alloy components is completed; the method proposed by the invention is used for , but not limited to laser fuse deposition additive manufacturing technology, can be applied and promoted in additive manufacturing processes such as arc fuse, plasma arc fuse and electron beam fuse.

Description

technical field [0001] The invention relates to a method for microstructure refinement and equiaxed grain transformation of titanium alloy components, in particular to a method for microstructure refinement and equiaxed grain transformation of titanium alloy components manufactured by laser fuse additives, belonging to rapid prototyping and material addition of titanium alloy components field of manufacturing technology. Background technique [0002] Titanium alloy has the advantages of low density, high strength, high yield ratio, excellent corrosion resistance and high temperature mechanical properties, and has been widely used in aerospace, transportation, biomedical and other fields. However, in the process of rapid prototyping and additive manufacturing of titanium alloys, there are extremely large temperature gradients and heating and cooling rates, which usually lead to the formation of coarse columnar grains in the metal or alloy during forming. This phenomenon is ob...

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Problems solved by technology

[0010] The purpose of the present invention is to provide a method for microstructure refinement and equiaxed grain transformation of titanium alloy components manufactured by laser fuse additive manufacturing in order to solve the problems of coarse structure and poor fatigue performance of titanium alloys in the process of additive manufacturing of large and complex parts

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