a) Field of the Invention
The present invention relates to a titanium-alloy substrate, and more particularly to a titanium-alloy substrate, material properties of which can be easily adjusted through a simple machining treatment.
b) Description of the Prior Art
A conventional small metal fitting, such as sport equipment (Golf head, striking surface), a housing structure (housing of an electronic part, housing of a watch), a small hardware part, and automobile or motorcycle part, will be manufactured by a technology of precision casting or precision die forging to achieve the expected structural strength as well as to meet the processing cost and the capacity.
For example, a metallic material is prefabricated into an embryo in a predetermined shape by the method of precision casting or precision die forging. The embryo is used as a substrate for the product to be processed in accordance with a predetermined specification or the embryo is further implemented with a procedure of surface machining at least one time to form the substrate in the predetermined specification, so as to be further processed into all kinds of finished product (alloy product).
Among the existing metallic materials, as being provided with the advantages of noble metal and base metal (such as high strength, anti-corrosion, light weight, good bio-compatibility, low thermal conductivity, good ductility, and no harm to human bodies), titanium alloy is specially suitably processed into a titanium-alloy product, such as a Golf head, a striking surface, a housing of an electronic part, a housing of a watch, a small hardware part, an automobile or motorcycle part, and even an artificial implant.
Moreover, depending upon the function and the purpose of titanium-alloy products, in the application end of processing titanium alloy into the titanium-alloy products, the shape and dimension of the titanium-alloy products will be usually determined by the processing procedure of stamping, cutting, grinding, or even surface treatment. On the other hand, in addition to that the titanium-alloy substrate should be provided with the structural strength required by the final titanium-alloy product, it is preferred that the titanium-alloy substrate is also provided with the advantage of convenience in the processing. Accordingly, it has been always an issue to be solved eagerly by the industry and the academic society to provide a titanium-alloy substrate, with that the material properties of the titanium-alloy substrate can be easily adjusted according to the requirement through the simple machining treatment in the application end of the processing.
To solve the abovementioned issue in the prior art, the primary object of the present invention is to provide a titanium-alloy substrate, the material properties of which can be easily adjusted through the simple machining treatment.
Accordingly, the present invention discloses a titanium-alloy substrate which is formed plastically by performing cast molding to alloyed titanium at least one time, wherein this titanium-alloy substrate is provided with a first structure layer which is arranged in a configuration of long axis crystal structure, and a second structure layer which is disposed on a side in adjacent to the first structure layer and is arranged in a configuration of equiaxed crystal structure.
Accordingly, the present invention discloses a titanium-alloy substrate which is formed plastically by performing cast molding to alloyed titanium at least one time, wherein this titanium-alloy substrate is provided with a first structure layer which is arranged in a configuration of long axis crystal structure, and a second structure layer which is disposed on a side in adjacent to the first structure layer and is arranged in a configuration of equiaxed crystal structure, with an included angle of 30°˜90° being formed between the first structure layer and the substrate surface.
Accordingly, the present invention discloses a titanium-alloy substrate which is formed plastically by performing cast molding to alloyed titanium at least one time, wherein this titanium-alloy substrate is provided with a first structure layer which is arranged in a configuration of long axis crystal structure and takes up more than 10% of volume in all titanium-alloy substrate, as well as a second structure layer which is arranged in a configuration of equiaxed crystal structure and takes up more than 10% of volume in all titanium-alloy substrate.
By the abovementioned structures, the titanium-alloy substrate of the present invention can be manifested as a configuration of plate or slab in a predetermined thickness or as a configuration of embryo in a predetermined shape, according to the shipping or processing need. In using the titanium-alloy substrate, based upon the practical need of the titanium-alloy product to which the entire titanium-alloy substrate is applied, all of the first structure layers can be reserved optionally, or a part or all of the first structure layer can be removed at a specific location of the titanium-alloy product through a simple processing of grinding or cutting or through a gate design, so as to achieve the object of adjusting the material properties easily.
By the abovementioned structures, the thickness of the titanium-alloy substrate can be less than 3 mm, and the first structure layer can take up more than 40% of volume in all titanium-alloy substrate.
By the abovementioned structures, the first structure layer can take up 80% of volume in all titanium-alloy substrate, and the second structure layer can take up 20% of volume in all titanium-alloy substrate.
By the abovementioned structures, the thickness of the titanium-alloy substrate can be between 3 mm and 8 mm, and the first structure layer can take up more than 20% of volume in all titanium-alloy substrate.
By the abovementioned structures, the first structure layer can take up 40% of volume in all titanium-alloy substrate, and the second structure layer can take up 60% of volume in all titanium-alloy substrate.
By the abovementioned structures, the thickness of the titanium-alloy substrate can be larger than 8 mm, and the second structure layer can take up more than 50% of volume in all titanium-alloy substrate.
By the abovementioned structures, the first structure layer can take up 10% of volume in all titanium-alloy substrate, and the second structure layer can take up 90% of volume in all titanium-alloy substrate.
By the abovementioned structures, the second structure layer can be disposed on an outer surface layer at a side in adjacent to the first structure layer.
By the abovementioned structures, the second structure layer can be disposed on a local outer surface layer in adjacent to the first structure layer.
By the abovementioned structures, the second structure layer can be disposed on a neighboring side inside the first structure layer.
Accordingly, the titanium-alloy substrate of the present invention is provided with the advantage of adjusting the material properties of the application end easily, thereby reducing the difficulty in processing and the processing cost of the application end. In particular, the titanium-alloy substrates in various thickness grades and the percentages of the second structure layers corresponding to the various thickness grades can be prefabricated depending upon the processing need of various titanium-alloy products, in order to facilitate choosing directly the titanium-alloy substrate in a proper thickness grade to be used in the application end. Therefore, the processing cost of the titanium-alloy product can be reduced and the processing quality of the titanium-alloy product can be assured by using a more aggressive and reliable means.
To enable a further understanding of the said objectives and the technological methods of the invention herein, the brief description of the drawings below is followed by the detailed description of the preferred embodiments.
Referring to
Upon implementation, a metallic mold is provided and assembled into a casting chamber, and then the alloyed titanium is put into a smelting chamber. The alloyed titanium in the smelting chamber is heated up in vacuum, and when the metallic material in the smelting chamber is melted down, the casting chamber is vacuumized. After that, the melted alloyed titanium is filled into the metallic mold and a hinge press system is activated to drive the metallic mold to press the melted alloyed titanium, thereby forming the alloyed titanium plastically through the abovementioned cast molding. After the alloyed titanium has been cooled down, the titanium-alloy substrate 10 will be formed as shown in
In principle, the titanium-alloy substrate 10 of the present invention can be manifested as a configuration of plate or slab in a predetermined thickness or as a configuration of embryo in a predetermined shape, depending upon the shipping or processing need. In using the titanium-alloy substrate 10, based upon the practical need of the titanium-alloy product to which the entire titanium-alloy substrate 10 is applied, all of the first structure layers 11 can be reserved optionally, or a part or all of the first structure layers 11 can be removed at a specific location of the titanium-alloy product through a simple processing of grinding or cutting or through a gate design, so as to achieve the object of adjusting the material properties easily.
For example, if the titanium-alloy product to be processed requires a higher mechanical structure strength, all of the second structure layers 12 of the titanium-alloy substrate 10 can be reserved optionally, and then the titanium-alloy substrate 10 is processed into the titanium-alloy product in a predetermined size by a machine cutting method, such as a Golf club striking surface in
Moreover, if the titanium-alloy product to be processed does not require specifically the mechanical structure strength but instead focuses on other material advantages of titanium alloy, then a part or all of the second structure layers can be removed through a simple treatment of grinding or cutting, allowing the titanium-alloy substrate 10 to be more suitable for being fabricated into the titanium-alloy product in a predetermined size by stamping or sheet-metal working equipment which is equipped with a low kinetic energy.
It is worthy of mentioning that the titanium-alloy substrates in various thickness grades, various locations for disposing the second structure layers and the percentages of the second structure layers corresponding to the various thickness grades can be prefabricated based upon the processing need of various titanium-alloy products, in order to facilitate choosing directly a proper titanium-alloy substrate to be used in the application end. For example, as shown in
Comparing with the prior art, the titanium-alloy substrate disclosed by the present invention is equipped with the advantage of adjusting the material properties of the application end easily. Therefore, the difficulty in processing and the processing cost of the application end can be reduced. In particular, the titanium-alloy substrates in various thickness grades and with the percentages of the second structure layers corresponding to the thickness grades can be even prefabricated based upon the processing need of various titanium-alloy products, so as to facilitate choosing directly the titanium-alloy substrate in a proper thickness grade to be used in the application end. Accordingly, the processing cost of the titanium-alloy product can be reduced and the processing quality of the titanium-alloy product can be assured by using a relatively more aggressive and reliable means.
It is of course to be understood that the embodiments described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.
Number | Date | Country | |
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20170081744 A1 | Mar 2017 | US |